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| 1 | Fatigue behavior of Ti-6Al-4V cellular structures fabricated by additive manufacturing technique显示文摘Porous titanium and its alloys have been considered as promising replacement for dense implants, as they possess low elastic modulus comparable to that of compact human bones and are capable of providing space for in-growth of bony tissues to achieve a better fixation. Recently, the additive manufacturing(AM) method has been successfully applied to the fabrication of Ti-6 Al-4 V cellular meshes and foams.Comparing to traditional fabrication methods, the AM method offers advantages of accurate control of complex cell shapes and internal pore architectures, thus attracting extensive attention. Considering the long-term safety in the human body, the metallic cellular structures should possess high fatigue strength.In this paper, the recent progress on the fatigue properties of Ti-6 Al-4 V cellular structures fabricated by the AM technique is reviewed. The various design factors including cell shapes, surface properties, post treatments and graded porosity distribution affecting the fatigue properties of additive manufactured Ti-6 Al-4 V cellular structures were introduced and future development trends were also discussed. | Dechun Ren Shujun Li Hao Wang Wentao Hou Yulin Hao Wei Jin Rui Yang R.Devesh K.Misra Lawrence E.Murr | 2019 | Journal of Materials Science & Technology2019，35，2： | 15 |
| 2 | Biofunctional magnesium coated Ti6Al4V scaffold enhances osteogenesis and angiogenesis in vitro and in vivo for orthopedic application显示文摘The insufficient osteogenesis and osseointegration of porous titanium based scaffold limit its further application.Early angiogenesis is important for scaffold survival.It is necessary to develop a multifunctional surface on titanium scaffold with both osteogenic and angiogenic properties.In this study,a biofunctional magnesium coating is deposited on porous Ti6Al4V scaffold.For osseointegration and osteogenesis analysis,in vitro studies reveal that magnesium-coated Ti6Al4V co-culture with MC3T3-E1 cells can improve cell proliferation,adhesion,extracellular matrix(ECM)mineralization and ALP activity compared with bare Ti6Al4V cocultivation.Additionally,MC3T3-E1 cells cultured with magnesium-coated Ti6Al4V show significantly higher osteogenesisrelated genes expression.In vivo studies including fluorochrome labeling,micro-computerized tomography and histological examination of magnesium-coated Ti6Al4V scaffold reveal that new bone regeneration is significantly increased in rabbits after implantation.For angiogenesis studies,magnesium-coated Ti6Al4V improve HUVECs proliferation,adhesion,tube formation,wound-healing and Transwell abilities.HUVECs cultured with magnesium-coated Ti6Al4V display significantly higher angiogenesis-related genes(HIF-1αand VEGF)expression.Microangiography analysis reveal that magnesium-coated Ti6Al4V scaffold can significantly enhance the blood vessel formation.This study enlarges the application scope of magnesium and provides an optional choice to the conventional porous Ti6Al4V scaffold with enhanced osteogenesis and angiogenesis for further orthopedic applications. | Peng Gao Bo Fan Xiaoming Yu Wenwen Liu Jie Wu Lei Shi Di Yang Lili Tan Peng Wan Yulin Hao Shujun Li Wentao Hou Ke Yang Xiaokang Li Zheng Guo | 2020 | Bioactive Materials2020，5，3： | 15 |
| 3 | Electron Beam Melted Beta-type Ti–24Nb–4Zr–8Sn Porous Structures With High Strength-to-Modulus Ratio显示文摘Electron beam melting(EBM)has been used to manufactureβ-type Ti–24Nb–4Zr–8Sn porous components with 70%porosity.EBM-produced components have favorable structural features(i.e.smooth strut surfaces,fewer defects)and an(α+β)-type microstructure,similar to that subjected to aging treatment.EBM-produced components exhibit more than twice the strength-to-modulus ratio of porous Ti–6Al–4V components having the same porosity.The processing–microstructure–property relationship and deformation behavior of EBM-produced components are discussed in detail.Such porous titanium components composed of non-toxic elements and having high strength-to-modulus ratio are highly attractive for biomedical applications. | Yujing Liu Shujun Li Wentao Hou Shaogang Wang Yulin Hao Rui Yang Timothy B.Sercombe Lai-Chang Zhang | 2016 | Journal of Materials Science & Technology2016，32，6： | 9 |
| 4 | Electroactive barium titanate coated titanium scaffold improves osteogenesis and osseointegration with low-intensity pulsed ultrasound for large segmental bone defects显示文摘For large segmental bone defects,porous titanium scaffolds have some advantages,however,they lack electrical activity which hinders their further use.In this study,a barium titanate(BaTiO3)piezoelectric ceramic was used to modify the surface of a porous Ti6Al4V scaffold(pTi),which was characterized by scanning electron microscopy,energy dispersive spectroscopy,X-ray photoelectron spectroscopy,and roughness and water contact angle analyses.Low intensity pulsed ultrasound(LIPUS)was applied in vitro and in vivo study.The activity of bone marrow mesenchymal stem cells,including adhesion,proliferation,and gene expression,was significantly superior in the BaTiO3/pTi,pTi+LIPUS,and BaTiO3/pTi+LIPUS groups than in the pTi group.The activity was also higher in the BaTiO3/pTi+LIPUS group than in the BaTiO3/pTi and pTi+LIPUS groups.Additionally,micro-computed tomography,the mineral apposition rate,histomorphology,and the peak pull-out load showed that these scaffold conditions significantly enhanced osteogenesis and osseointegration 6 and 12 weeks after implantation in large segmental bone defects in the radius of rabbits compared with those resulting from the pTi condition.Consequently,the improved osteogenesis and osseointegration make the BaTiO3/pTi+LIPUS a promising method to promote bone regeneration in large segmental bone defects for clinical application. | Bo Fan Zheng Guo Xiaokang Li Songkai Li Peng Gao Xin Xiao Jie Wu Chao Shen Yilai Jiao Wentao Hou | 2020 | Bioactive Materials2020，5，4： | 9 |
| 5 | Heat treatment enhancing the compressive fatigue properties of open-cellular Ti-6Al-4V alloy prototypes fabricated by electron beam melting显示文摘In this work, we report the effect of annealing in α+β phase field on the fatigue properties of Ti-6 Al-4 V alloy meshes fabricated by electron beam melting. The results show that annealing at high temperature near the phase boundary enhances the ductility of the brittle mesh struts due to the formation of coarseα lamellas with a large thickness/length ratio. Accordingly, the fatigue endurance ratio of the studied meshes increases to up to ~0.6, which is much superior to that of the as-fabricated counterparts and comparable to those of dense materials. | Wei Yuan Wentao Hou Shujun Li Yulin Hao Rui Yang Lai-Chang Zhang Yue Zhu | 2018 | Journal of Materials Science & Technology2018，34，7： | 5 |
| 6 | Fast DOA estimation algorithm for MIMO sonar based on ant colony optimization显示文摘The maximum likelihood (ML) estimator demonstrates remarkable performance in direction of arrival (DOA) estimation for the multiple input multiple output (MIMO) sonar.However,this advantage comes with prohibitive computational complexity.In order to solve this problem,an ant colony optimization (ACO) is incorporated into the MIMO ML DOA estimator.Based on the ACO,a novel MIMO ML DOA estimator named the MIMO ACO ML (ML DOA estimator based on ACO for MIMO sonar) with even lower computational complexity is proposed.By extending the pheromone remaining process to the pheromone Gaussian kernel probability distribution function in the continuous space,the proposed algorithm achieves the global optimum value of the MIMO ML DOA estimator.Simulations and experimental results show that the computational cost of MIMO ACO ML is only 1/6 of the MIMO ML algorithm,while maintaining similar performance with the MIMO ML method. | Wentao Shi Jianguo Huang Yunshan Hou | 2012 | Journal of Systems Engineering and Electronics2012，23，2： | 4 |
| 7 | Metal-Organic Framework Materials for Electrochemical Supercapacitors显示文摘Exploring new materials with high stability and capacity is full of challenges in sustainable energy conversion and storage systems.Metal-organic frameworks(MOFs),as a new type of porous material,show the advantages of large specific surface area,high porosity,low density,and adjustable pore size,exhibiting a broad application prospect in the field of electrocatalytic reactions,batteries,particularly in the field of supercapacitors.This comprehensive review outlines the recent progress in synthetic methods and electrochemical performances of MOF materials,as well as their applications in supercapacitors.Additionally,the superiorities of MOFs-related materials are highlighted,while major challenges or opportunities for future research on them for electrochemical supercapacitors have been discussed and displayed,along with extensive experimental experiences. | Ziwei Cao Roya Momen Shusheng Tao Dengyi Xiong Zirui Song Xuhuan Xiao Wentao Deng Hongshuai Hou Sedat Yasar Sedar Altin Faith Bulut Guoqiang Zou Xiaobo Ji | 2022 | Nano-Micro Letters2022，14，11： | 4 |
| 8 | Mechanism of keyhole pore formation in metal additive manufacturing显示文摘During metal additive manufacturing,the porosity of the as-built part deteriorates the mechanical property and even hinders the further application of metal additive manufacturing.Particularly,the mechanisms of keyhole pores associated with the keyhole fluctuation are not fully understood.To reveal the mechanisms of the keyhole pores formation,we adopt a multiphysics thermal-fluid flow model incorporating heat transfer,liquid flow,metal evaporation,Marangoni effect,and Darcy’s law to simulate the keyhole pore formation process,and the results are validated with the in situ X-ray images.The simulation results present the instant bubble formation due to the keyhole instability and motion of the instant bubble pinning on the solidification front.Furthermore,comparing the keyhole pore formation under different laser scanning speeds shows that the keyhole pore is sensitive to the manufacturing parameters.Additionally,the simulation under a low ambient pressure shows the feasibility of improving the keyhole stability to reduce and even avoid the formation of keyhole pores. | Lu Wang Yanming Zhang Hou Yi Chia Wentao Yan | 2022 | npj Computational Materials2022，，1： | 3 |
| 9 | Longitudinal Compression Behavior of Functionally Graded Ti–6Al–4V Meshes显示文摘The compressive deformation behavior in the longitudinal direction of graded Ti–6Al–4V meshes fabricated by electron beam melting was investigated using experiments and finite element methods(FEM).The results indicate that the overall strain along the longitudinal direction is the sum of the net strain carried by each uniform mesh constituent and the deformation behavior fits the Reuss model well. The layer thickness and the sectional area have no effect on the elastic modulus, whereas the strength increases with the sectional area due to the edge effect of each uniform mesh constituent. By optimizing3 D graded/gradient design, meshes with balanced superior properties, such as high strength, energy absorption and low elastic modulus, can be fabricated by electron beam melting. | Shangzhou Zhang Cong Li Wentao Hou Shuo Zhao Shujun Li | 2016 | Journal of Materials Science & Technology2016，32，11： | 3 |
| 10 | The movement features analysis of Laohugou Glacier No.12 in Qilian Mountains显示文摘The Laohugou Glacier No.12 is the largest valley glacier in Qilian Mountains,which is located in northern Qinghai-Tibet Plateau.Movement is the basic characteristic of glaciers,and is also an important distinction from other terrestrial natural ice.Glacier changes not only reflect climate change,but also play an important role in humanity society.In the arid regions of western China,glaciers are becoming an important water source.We use the GPS receiver (South-Lingrui S82) as data platform with the aid of RTK measurement technology to observe the surface velocity of Laohugou Glacier No.12.Surface velocity data shows that the maximum value appears at an altitude of 4,750-4,850 m during the period of 2008-2009.During this period,the west branch surface velocity reached 32.6 m per year at an altitude near 4,830 m,the east branch surface velocity reached 32.4 m per year at the altitude near 4,770 m.Comparing the surface velocity data during 2008-2009 with observation results in 1959,the glacier velocity slowed down about 11%. | YuShuo Liu Xiang Qin WenTao Du WeiJun Sun DianJiong Hou | 2011 | Research in Cold and Arid Regions2011，3，2： | 3 |
| 11 | Crack-free single-crystalline Co-free Ni-rich LiNi_(0.95)Mn_(0.05)O_(2) layered cathode显示文摘The rapid growth in global electric vehicles(EVs)sales has promoted the development of Co-free,Ni-rich layered cathodes for state-of-the-art high energy-density,inexpensive lithium-ion batteries(LIBs).However,progress in their commercial use has been seriously hampered by exasperating performance deterioration and safety concerns.Herein,a robust single-crystalline,Co-free,Ni-rich LiNi_(0.95)Mn_(0.05)O_(2)(SC-NM95)cathode is successfully designed using a molten salt-assisted method,and it exhibits better structural stability and cycling durability than those of polycrystalline LiNi_(0.95)Mn_(0.05)O_(2) (PC-NM95).Notably,the SC-NM95 cathode achieves a high discharge capacity of 218.2 mAh g^(-1),together with a high energy density of 837.3 Wh kg^(-1) at 0.1 C,mainly due to abundant Ni^(2+)/Ni^(3+) redox.It also presents an outstanding capacity retention(84.4%)after 200 cycles at 1 C,because its integrated single-crystalline structure effectively inhibits particle microcracking and surface phase transformation.In contrast,the PC-NM95 cathode suffers from rapid capacity fading owing to the nucleation and propagation of intergranular microcracking during cycling,facilitating aggravated parasitic reactions and rocksalt phase accumulation.This work provides a fundamental strategy for designing high-performance singlecrystalline,Co-free,Ni-rich cathode materials and also represents an important breakthrough in developing high-safe,low-cost,and high-energy LIBs. | Lianshan Ni Ruiting Guo Susu Fang Jun Chen Jinqiang Gao Yu Mei Shu Zhang Wentao Deng Guoqiang Zou Hongshuai Hou Xiaobo Ji | 2022 | eScience2022，2，1： | 2 |
| 12 | Special interstitial route can transport nanoparticles to the brain bypassing the blood-brain barrier显示文摘Nowadays,nanoparticles(NPs)are considered to be ideal tools for bioimaging and drug delivery.Although increasing research has focused on NP biodistribution,transportation in the interstitial architecture has been neglected.The entire body is connected by the interstitial architecture,which can provide a long-range and direct pathway for NP biodistribution in a nonvascular system.In this study,we report that 10-nm gold NPs injected directly into the interstitial architecture of the tarsal tunnel of rats(intervaginal space injection(ISI))were delivered to the brain without crossing the blood-brain barrier.Furthermore,NaGdF4 nanoparticles were used to explore the transportation route by magnetic resonance imaging.The results demonstrated that,after ISI,the NaGdF4 nanoparticles were transported through the perivascular interstitial space of the carotid arteries and brain vessels to the brain.This is a special nonvascular transportation route like a stream based on the interstitial architecture that provides an alternative pathway for NP biodistribution. | Nan Hu Xiaoli Shi Qiang Zhang Wentao Liu Yuting Zhu Yuqing Wang Yi Hou Yinglu Ji Yupeng Cao Qian Zeng Zhuo Ao Quanmei Sun Xiaohan Zhou Xiaochun Wu Dong Han | 2019 | Nano Research2019，12，11： | 2 |
| 13 | Endoplasmic reticulum stress mediates homocysteine-induced hypertrophy of cardiac cells through activation of cyclic nucleotide phosphodiesterase 1C显示文摘Although the association of elevated homocysteine level with cardiac hypertrophy has been reported,the molecular mechanisms by which homocysteine induces cardiac hypertrophy remain inadequately understood.In this study we aim to uncover the roles of cyclic nucleotide phosphodiesterase 1(PDE1)and endoplasmic reticulum(ER)stress and their relationship to advance the mechanistic understanding of homocysteine-induced cardiac cell hypertrophy.H9c2 cells and primary neonatal rat cardiomyocytes are exposed to homocysteine with or without ER stress inhibitor TUDCA or PDE1-specific inhibitor Lu AF58027,or transfected with siRNAs targeting PDE1 isoforms prior to homocysteine-exposure.Cell surface area is measured and ultrastructure is examined by transmission electron microscopy.Hypertrophic markers,PDE1 isoforms,and ER stress molecules are detected by q-PCR and western blot analysis.Intracellular cGMP and cAMP are measured by ELISA.The results show that homocysteine causes the enlargement of H9c2 cells,increases the expressions of hypertrophic markers β-MHC and ANP,upregulates PDE1A and PDE1C,promotes the expressions of ER stress molecules,and causes ER dilatation and degranulation.TUDCA and Lu AF58027 downregulate β-MHC and ANP,and alleviate cell enlargement.TUDCA decreases PDE1A and PDE1C levels.Silencing of PDE1C inhibits homocysteine-induced hypertrophy,whereas PDE1A knockdown has minor effect.Both cAMP and cGMP are decreased after homocysteine-exposure,while only cAMP is restored by Lu AF58027 and TUDCA.TUDCA and Lu AF58027 also inhibit cell enlargement,downregulate ANP,β-MHC and PDE1C,and enhance cAMP level in homocysteine-exposed primary cardiomyocytes.ER stress mediates homocysteine-induced hypertrophy of cardiac cells via upregulating PDE1C expression.Cyclic nucleotide,especially cAMP,is the downstream mediator of the ER stress-PDE1C signaling axis in homocysteine-induced cell hypertrophy. | Wentao Sun Yang Zhou Hongmei Xue Haitao Hou Guowei He Qin Yang | 2022 | Acta Biochimica et Biophysica Sinica2022，54，3： | 2 |
| 14 | Experimental study on expansion and cracking properties of static cracking agents in different assembly states显示文摘Rolled static cracking agent(RSCA)can solve the intractable problem of traditional bulk static cracking agent(BSCA)in engineering applications.This paper innovatively studies the rational water-cement ratio of BSCA and the immersion soaking time of RSCA under the condition of controlling temperature.Through the expansion and cracking performance experiments,the development characteristics of expansion pressure,the cracking effect of the single-hole specimen and the performance of hole spraying prevention under the action of BSCA and RSCA were compared and analyzed.The results show that:(1)The volume growth rate of static cracking agent decreases with the increase of water-cement ratio,and the fluidity increases with the increase of water-cement ratio.The rational water-cement ratio for BSCA application is 0.3,and the rational immersion time of RSCA is 2-2.5 min;(2)Under the bore diameters of 30,35,40 and 45 mm,the expansion pressure of BSCA with a water-cement ratio of 0.3 is 38.2,52.3,61.5 and 68 MPa,and the expansion pressure of RSCA immersed in water for 2.5 min is 43.5,58.8,69.5 and 75.1 MPa,respectively.Among them,the development speed of expansion pressure of BSCA is higher than that of RSCA,and the arrival time of the peak expansion pressure of RSCA is 1.7 times that of BSCA;(3)The crack initiation speed of single-hole specimen under the action of RSCA is 10.3%lower than that under the action of BSCA,but the cracking speed of the former is 72.6%higher than that of the latter;(4)The hole spraying occurs in BSCA under the bore diameter of 50,55 and 60 mm,while the hole spraying occurs in RSCA under the bore diameter of 60 mm.In terms of bore diameter,the hole spraying prevention of the RSCA is better than that of BSCA.The research results enrich the static blasting technology and provide data support and theoretical reference for field application. | Chong Li Sifeng He Wentao Hou Dan Ma | 2022 | International Journal of Mining Science and Technology2022，32，6： | 1 |
| 15 | Natural Stibnite for Lithium‑/Sodium‑Ion Batteries:Carbon Dots Evoked High Initial Coulombic Efficiency显示文摘The application of Sb_(2)S_(3)with marvelous theoretical capacity for alkali metal-ion batteries is seriously limited by its poor electrical conductivity and low initial coulombic efficiency(ICE).In this work,natural stibnite modified by carbon dots(Sb_(2)S_(3)@xCDs)is elaborately designed with high ICE.Greatly,chemical processes of local oxidation–partial reduction–deep coupling for stibnite reduction of CDs are clearly demonstrated,confirmed with in situ high-temperature X-ray diffraction.More impressively,the ICE for lithium-ion batteries(LIBs)is enhanced to 85%,through the effect of oxygen-rich carbon matrix on C–S bonds which inhibit the conversion of sulfur to sulfite,well supported by X-ray photoelectron spectroscopy characterization of solid electrolyte interphase layers helped with density functional theory calculations.Not than less,it is found that Sb–O–C bonds existed in the interface effectively promote the electronic conductivity and expedite ion transmission by reducing the bandgap and restraining the slip of the dislocation.As a result,the optimal sample delivers a tremendous reversible capacity of 660 mAh g^(−1)in LIBs at a high current rate of 5 A g^(−1).This work provides a new methodology for enhancing the electrochemical energy storage performance of metal sulfides,especially for improving the ICE. | Yinger Xiang Laiqiang Xu Li Yang Yu Ye Zhaofei Ge Jiae Wu Wentao Deng Guoqiang Zou Hongshuai Hou Xiaobo Ji | 2022 | Nano-Micro Letters2022，14，8： | 1 |
| 16 | Methods of improving the initial Coulombic efficiency and rate performance of both anode and cathode materials for sodium-ion batteries显示文摘Sodium-ion batteries(SIBs) have gained more scientists’ interest, owing to some facts such as the natural abundance of Na, the similarities of physicochemical characteristics between Li and Na. The irreversible Na+ions consumption during the first cycle of charge/discharge process(due to the formation of the solid electrolyte interface(SEI) on the electrode surface and other irreversible reactions) is the factor that determines high performance SIBs and largely reduces the capacity of the full cell SIBs. Thus, the initial coulombic efficiency(ICE) of SIBs for both anode and cathode materials, is a key parameter for high performance SIBs, and the point is to increase the transport rate of the Na+ions. Therefore, developing SIBs with high ICE and rate performance becomes vital to boost the commercialization of SIBs. Here we provide a review on the methods to improve the ICE and the rate performance, by summarizing some methods of improving the ICE and rate performance of the anode and cathode materials for SIBs, and end by a conclusion with some perspectives and recommendations. | Nkongolo Tshamala Aristote Kangyu Zou Andi Di Wentao Deng Baowei Wang Xinglan Deng Hongshuai Hou Guoqiang Zou Xiaobo Ji | 2022 | Chinese Chemical Letters2022，33，2： | 1 |
| 17 | Effect of interfacial interaction on morphology and mechanical properties of PP/POE/BaSO4 ternary composites显示文摘 | Zhen Li Shaoyun Guo Wentao Song Bin Hou | 2003 | Journal of Materials Science2003，38，8： | 1 |
| 18 | Coupled thermo-hydro-mechanical simulation of CO2 enhanced gas recovery with an extended equation of state module for TOUGH2MP-FLAC3D显示文摘As one of the most important ways to reduce the greenhouse gas emission,carbon dioxide(CO_2)enhanced gas recovery(CO_2-EGR) is attractive since the gas recovery can be enhanced simultaneously with CO_2 sequestration.Based on the existing equation of state(EOS) module of TOUGH2 MP,extEOS7C is developed to calculate the phase partition of H_2O-CO_2-CH_4-NaCl mixtures accurately with consideration of dissolved NaCI and brine properties at high pressure and temperature conditions.Verifications show that it can be applied up to the pressure of 100 MPa and temperature of 150℃.The module was implemented in the linked simulator TOUGH2MP-FLAC3 D for the coupled hydro-mechanical simulations.A simplified three-dimensional(3D)1/4 model(2.2 km×1 km×1 km) which consists of the whole reservoir,caprock and baserock was generated based on the geological conditions of a gas field in the North German Basin.The simulation results show that,under an injection rate of 200,000 t/yr and production rate of 200,000 sm^3/d,CO_2 breakthrough occurred in the case with the initial reservoir pressure of 5 MPa but did not occur in the case of 42 MPa.Under low pressure conditions,the pressure driven horizontal transport is the dominant process;while under high pressure conditions,the density driven vertical flow is dominant.Under the considered conditions,the CO_2-EGR caused only small pressure changes.The largest pore pressure increase(2 MPa) and uplift(7 mm) occurred at the caprock bottom induced by only CO_2 injection.The caprock had still the primary stress state and its integrity was not affected.The formation water salinity and temperature variations of ±20℃ had small influences on the CO_2-EGR process.In order to slow down the breakthrough,it is suggested that CO_2-EGR should be carried out before the reservoir pressure drops below the critical pressure of CO_2. | Yang Gou Zhengmeng Hou Mengting Li Wentao Feng Hejuan Liu | 2016 | Journal of Rock Mechanics and Geotechnical Engineering2016，8，6： | 1 |
| 19 | Electrochemical behavior of open-cellular structured Ti-6Al-4V alloy fabricated by electron beam melting in simulated physiological fluid:the significance of pore characteristics显示文摘The cellular structured titanium alloys have attracted significant attention for implants because of their lower Young’s modulus,which is comparable to human bone and has the capability of providing space for bone tissue in-growth.However,there is a gap in the knowledge in regard to the relationship between the pore characteristics and the electrochemical performance of open-cellular structured titanium alloys.In this study,we elucidate the influence of pore characteristics on the electrochemical performance of open-cellular structured Ti-6Al-4V alloys produced by electron beam melting(EBM).Intriguingly,the passive film formed on cellular structured Ti-6Al-4V alloy with a larger pore size was more stable and protective,and the corrosion performance was superior compared to the samples with a smaller pore size in phosphate buffered saline(PBS),mainly because of relatively smaller exposed surface area and unlimited flow of electrolyte.However,in acidic PBS containing fluoride ions,the pore characteristics did not play an important role in the corrosion resistance.It was considered that the protective film breaks down such that the corrosion performance of cellular structured alloys was comparable to each other in this harsh environment. | Xin Gai Rui Liu Yun Bai Shujun Li Yang Yang Shenru Wang Jianguo Zhang Wentao Hou Yulin Hao Xing Zhang Rui Yang R.D.K.Misra | 2022 | Journal of Materials Science & Technology2022，，2： | 1 |
| 20 | Characterization of the asymmetric evolving yield and flow of 6016-T4 aluminum alloy and DP490 steel显示文摘6016-T4 aluminum alloy and DP490 steel were systematically tested under 24 proportional loading paths,including uniaxial tensile tests with a 15°increment,uniaxial compressive and simple shear tests with a 45°increment,and biaxial tensile tests using cruciform specimens.Cruciform specimens in the rolling/transverse and 45°/135°sampling directions were tested with seven and four different stress ra-tios,respectively.The normal and diagonal planes plastic work contours and the yield stresses under uniaxial tension and compression were measured to investigate the anisotropic yield.Meanwhile,the normal and diagonal planes directions of plastic strain rate and the rα-values under uniaxial tension and compression were characterized to confirm the plastic flow.Several existing asymmetric yield crite-ria under the associated and non-associated flow rules were comprehensively evaluated to describe the asymmetric plastic anisotropy of 6016-T4 aluminum alloy and DP490 steel.The results suggest that in the investigated yield criteria,the non-associated models can predict the tension and compression asym-metry of materials more accurately than the associated models,and the function of stress triaxiality can more effectively describe the asymmetric yield behavior than the first stress invariant.In addition,the pure shear stress states are helpful in assessing the validity and applicability of advanced asymmetric yield stress functions,and the inspection of diagonal plane plastic work contours containing more pure shear stress states should prioritized over that of normal plane plastic work contours.The evaluation of plastic potential functions should not only consider the prediction accuracy of the normal plane di-rections of plastic strain rate,but also further check the diagonal plane directions of plastic strain rate.Expressing mechanical properties as a function of equivalent plastic strain to calibrate parameters of the yield criterion allows the continuous capture of anisotropic evolution of the asymmetric yield surface and the changes in the asymmetric plastic potential surface. | Kai Du Shaohui Huang Yong Hou Haibo Wang Yinxiao Wang Wentao Zheng Xiaoguang Yuan | 2023 | Journal of Materials Science & Technology2023，，2： | 1 |
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