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| 1 | Recent advances in biodegradation controls over Mg alloys for bone fracture management: A review显示文摘Magnesium(Mg) alloys possess comparable physical and mechanical properties to bone, making them an outstanding candidate of implant materials for bone fracture treatment. In addition to the excellent biocompatibility, and bioactivity, the engagement of Mg alloys is key for a number of biological functionalities in the human body. The unique biodegradation nature of Mg alloy implants implies that it may not require a secondary removal procedure when the expected supporting tasks accomplish, as they may simply and safely 'disappear' over time. Nonetheless, the demonstrated drawback of potentially rapid degradation, is an issue that must be addressed appropriately for Mg implants and is consequently given unique attention in this review article. Herein, the critical criteria and the state-of-the-art strategies for controlling the degradation process of Mg alloys are reported. Furthermore, future developments of biodegradable Mg and its alloys systems with satisfactory specifications for clinical trials and deployment,are discussed. This review aims to provide information to materials scientists and clinical practitioners in the context of developing practical biodegradable Mg alloys. | Ming-Shi Song Rong-Chang Zeng Yun-Fei Ding Rachel W.Li Mark Easton Ivan Cole Nick Birbilis Xiao-Bo Chen | 2019 | Journal of Materials Science & Technology2019，35，4： | 26 |
| 2 | Corrosion resistance of in-situ growth of nano-sized Mg(OH)2 on micro-arc oxidized magnesium alloy AZ31—Influence of EDTA显示文摘One of the major obstacles for the clinical use of biodegradable magnesium(Mg)-based materials is their high corrosion rate. Micro-arc oxidation(MAO) coatings on Mg alloys provide mild corrosion protection owing to their porous structure. Hence, in this study a dense Mg(OH)2 film was fabricated on MAO-coated Mg alloy AZ31 in an alkaline electrolyte containing ethylenediamine tetraacetic acid disodium(EDTA-2 Na) to reinforce the protection. Surface morphology, chemical composition and growth process of the MAO/Mg(OH)2 hybrid coating were examined using field-emission scanning electron microscopy, energy dispersive X-ray spectrometer, X-ray diffraction, X-ray photoelectron spectroscopy and Fourier transform infrared spectrophotometer. Corrosion resistance of the coatings was evaluated via potentiodynamic polarization curves and hydrogen evolution tests. Results manifested that the Mg(OH)2 coating possesses a porous nano-sized structure and completely seals the micro-pores and micro-cracks of the MAO coating.The intermetallic compound of AlMn phase in the substrate plays a key role in the growth of Mg(OH)2 film. The current density of Mg(OH)2-MAO composite coating decreases three orders of magnitude in comparison with that of bare substrate, indicating excellent corrosion resistance. The Mg(OH)2-MAO composite coating is beneficial to the formation of calcium phosphate corrosion products on the surface of Mg alloy AZ31, demonstrating a great promise for orthopaedic applications. | Chang-Yang Li Xiao-Li Fan Rong-Chang Zeng Lan-Yue Cui Shuo-Qi Li Fen Zhang Qing-Kun He M. Bobby Kannan Hong-Wei (George) Jiang Dong-Chu Chen Shao-Kang Guan | 2019 | Journal of Materials Science & Technology2019，35，6： | 16 |
| 3 | 电压增幅对镁合金微弧氧化膜层性能的影响显示文摘研究了硅酸盐体系微弧氧化过程中,电源电压增幅对放电火花形态及AZ91D镁合金膜层的厚度、表面形貌和耐蚀性有影响。结果表明,随着脉冲电压增加,电弧的弧斑亮度增强、尺寸变大,但数目减少,大弧倾向增加;微弧氧化膜层的厚度增厚,但成膜速率降低;膜层表面熔融物颗粒增大,表面孔径增加,粗糙度增加;腐蚀率呈现出先减小后增加的趋势。当电压增幅为100~150V时,其过程稳定性、成膜速率、膜层外观质量和耐蚀性等方面的综合性能相对最优。 | 陈明 马跃洲 马颖 郝远 | 2010 | 稀有金属材料与工程2010，39，11： | 14 |
| 4 | In vitro corrosion resistance and antibacterial performance of noveltin dioxide-doped calcium phosphate coating on degradable Mg-1Li-1Ca alloy显示文摘A SnO_2-doped calcium phosphate(Ca-P-Sn) coating was constructed on Mg-1 Li-1 Ca alloy by a hydrothermal process. The fabricated functional coatings were investigated using scanning electron microscopy(SEM), X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FT-IR). A triple-layered structure, which is composed of Ca_3(PO_4)_2,(Ca, Mg)_3(PO_4)_2, SnO_2, and MgHPO_4·3 H_2O, is evident and leads to the formation of Ca_(10)(PO_4)_6(OH)_2 in Hank's solution. Electrochemical measurements, hydrogen evolution tests and plating counts reveal that the corrosion resistance and antibacterial activity were improved through the coating treatment. The embedded SnO_2 nanoparticles enhanced crystallisation of the coating.The formation and degradation mechanisms of the coating were discussed. | Lan-Yue Cui Guang-Bin Wei Zhuang-Zhuang Han Rong-Chang Zeng Lei Wang Yu-Hong Zou Shuo-Qi Li Dao-Kui Xu Shao-Kang Guan | 2019 | Journal of Materials Science & Technology2019，35，3： | 14 |
| 5 | The present and future of the magnesium alloy researches显示文摘This paper gave a brief discussion on the characteristics of Mg alloys and gave a brief review in the Mg alloys researches, with emphasis on the research progress and fabrication technology. Several vital directions for the future development were pointed out. | ~*Y. Y. Li(Key Laboratory for Advanced Metallic Materials Processing and Forming of Guangdong Advanced Metallic Materials Research and ProcessingTechnology Center, South China University of Technology, Guangzhou 510640, Guangdong, P. R. China) | 2004 | China Foundry2004，1，S1： | 10 |
| 6 | Effects of small additions of Zn on the microstructure, mechanical properties and corrosion resistance of WE43B Mg alloys显示文摘Zn is a commonly used alloying element for Mg alloys owing to its beneficial effects on mechanical properties. To improve the mechanical and corrosion properties of WE43B Mg alloys, the effects of 0–0.7wt% Zn addition on the microstructure and properties of sample alloys were investigated. Addition of Zn to as-cast WE43B alloy promoted the formation of the Mg12Nd phase;by contrast, after T6 heat treatment, the phase composition of WE43B alloys with and without Zn addition remained mostly the same. A long-period stacking ordered phase was predicted by CALPHAD calculation, but this phase was not observed in either the as-cast or heat-treated Zn-containing WE43B alloys. The optimum temperature and duration of T6 heat treatment were obtained using CALPHAD calculations and hardness measurements. Addition of Zn resulted in a slight reduction in the average grain size of the as-cast and T6 heat-treated WE43B alloys and endowed them with increased corrosion resistance with little effect on their mechanical properties. | A.V. Koltygin V.E. Bazhenov R.S. Khasenova A.A. Komissarov A.I. Bazlov V.A. Bautin | 2019 | International Journal of Minerals,Metallurgy and Materials2019，26，7： | 9 |
| 7 | Microstructure, mechanical properties and deformation mechanisms of an as-cast Mg–Zn–Y–Nd–Zr alloy for stent applications显示文摘A new Mg-2Zn-0.2Y -0.5N d-0.4Zr (wt%) alloy designed specially for stent applications has been developed. The as-cast alloy is featured with equiaxed grains with a mean size of about 40 μm and a small am ount of second phase (T phase) distributed discontinuously either at the grain boundaries or inside the grains. This alloy exhibits a tensile elongation of up to 35%, which is much larger than that of most reported other as-cast Mg alloys. The tensile deform ation mechanisms have also been investigated. The results show that, besides basal slip,{10-12} extension twining and non-basal pyramidal slips can also be observed at initial stage and later stage during tensile deform ation, respectively, which are responsible for the good room -tem perature ductility. | Jianfeng Wang Hongbo Zhou Liguo Wang Shijie Zhu Shaokang Guan | 2019 | Journal of Materials Science & Technology2019，35，7： | 9 |
| 8 | Improving corrosion resistance of RE-containing magnesium alloy ZE41A through ECAP显示文摘Significant grain refinement was achieved in rare earth (RE) containing aeronautic magnesium alloy ZE41A through equal-channel angular pressing (ECAP) using rotary die at 603 K. Influence of ECAP pass number on its microstructure change and corrosion behavior was investigated by optical microscope (OM)/scanning electron microscope (SEM) observation and potentiostatic polarization tests in aqueous solution of NaCl, respectively. The results showed that ultrafine equiaxial grains (about 2.5 μm) were obtained over 16 passes due to plastic-induced grain refinement accommodated by dynamic recrystallization. The lower corrosion current density and nobler corrosion potential correlated with large number of pressing passes were attributed to the low tendency toward localized corrosion with broken secondary phase after homogenization on ultrafine-grained Mg matrix. The multi-pass ECAP method made the ZE41A aeronautic magnesium alloy more attractive since severe plastic deformation may significantly improve its corrosion resistance besides superior mechanical properties. | 江静华 马爱斌 SAITO Naobumi 沈志欣 宋丹 卢富敏 Yoshinori NISHIDA 杨东辉 林萍华 | 2009 | Journal of Rare Earths2009，27，5： | 8 |
| 9 | 新型镁合金大变形技术的研究与验证显示文摘研究了一种正挤压与等通道挤压相结合的新的Extrusion-Shearing(ES)变形方法。应用有限元法对ES变形过程进行了计算机模拟,表明ES技术可以大大提高累积应变和动态再结晶晶粒的体积分数。在Gleeble1500热模拟机上安装ES成形模具,对ES成形挤出的棒料进行微观组织观察,并对热模拟的数据进行处理。结果表明,ES成形可以细化晶粒并提高成形的均匀性。计算机模拟和热模拟实验表明,ES成形是一种新型的镁合金大塑性变形方法,可以有效细化晶粒、提高组织的均匀性。 | 胡红军 张丁非 杨明波 邓明 | 2010 | 稀有金属材料与工程2010，39，12： | 7 |
| 10 | Review of the atmospheric corrosion of magnesium alloys显示文摘Mg atmospheric corrosion is induced by a thin surface aqueous layer. Controlling factors are microgalvanic acceleration between different phases, protection by a continuous second phase distribution, protection by corrosion products, and degradation of protective layers by aggressive species such as chloride ions. The Mg atmospheric corrosion rate increases with relative humidity (RH) and concentrations of aggressive species. Temperature increases the corrosion rate unless a protective film causes a decrease.O2, SO2 and NO2 accelerate the atmospheric corrosion rate, whereas the corrosion rate is decreased by CO2. The traditional gravimetric method can evaluate effectively the corrosion behavior of Mg alloys. | Hongguang Liu Fuyong Cao Guang-Ling Song Dajiang Zheng Zhiming Shi Mathew S.Dargusch Andrej Atrens | 2019 | Journal of Materials Science & Technology2019，35，9： | 7 |
| 11 | Corrosion and electrochemical behavior of as-cast Mg-5Y-7Gd-1Nd-0.5Zr magnesium alloys in 5%NaCl aqueous solution | Xin ZHANG Kui ZHANG Xing-gang LI Cong WANG Hong-wei LI Chang-shun WANG Xia DENG | 2011 | Progress in Natural Science:Materials International2011，21，4： | 6 |
| 12 | Microstructure and Mechanical Properties of Mg–RE–TM Cast Alloys Containing Long Period Stacking Ordered Phases: A Review显示文摘Casting magnesium alloys hold the greatest share of magnesium application products due to their short processing period, low cost and near net shape forming. Compared with conventional commercial magnesium alloys or other Mg–RE-based alloys, the novel Mg–RE–TM cast alloys with long period stacking ordered(LPSO) phases usually possess a higher strength and are promising candidates for aluminum alloy applications. Up to now, two ways: alloying design and casting process control(including subsequent heat treatments), have been predominantly employed to further improve the mechanical properties of these alloys. Alloying with other elements or ceramic particles could alter the solidifi cation pattern of alloys, change the morphology of LPSO phases and refi ne the microstructures. Diff erent casting techniques(conventional casting, rapidly solidifi cation, directional solidifi cation, etc.) introduce various microstructure characteristics, such as dendritic structure, nanocrystalline, metastable phase, anisotropy. Further heat treatments could activate the transformation of various LPSO structures and precipitation of diverse precipitates. All these evolutions exert great impacts on the mechanical properties of the LPSO-containing alloys. However, the underlying mechanisms still remain a subject of debate. Therefore, this review mainly provides the state of the art of the casting magnesium alloys research and the accompanying challenges and summarizes some topics that merit future investigation for developing high-performance Mg–RE–TM cast alloys. | Huan Liu He Huang Jia-Peng Sun Ce Wang Jing Bai Ai-Bin Ma Xian-Hua Chen | 2019 | Acta Metallurgica Sinica(English Letters)2019，32，3： | 6 |
| 13 | An improved neural network model for prediction of mechanical properties of magnesium alloys显示文摘An improved neural network model was developed for prediction of mechanical properties in the de-sign and development of new types of magnesium alloys by refining the types of input variables and using a more reasonable algorithm. The results showed that the improved model apparently decreased the prediction errors, and raised the accuracy of the prediction results. Better preprocessing parame-ters were found to be [0.15, 0.90] for the tensile strength, [0.1, 0.9] for the yield strength, and [0.15, 0.90] for the elongation. When the above parameters were used, the relativity for predicition of strength was bigger than 0.95. By using improved ANN analysis, more reasonable process parameters and compo- sition could be obtained in some magnesium alloys without addition of strontoum. | TANG AiTao LIU Bin PAN FuSheng ZHANG Jing PENG Jian WANG JingFeng | 2009 | Science China(Technological Sciences)2009，52，1： | 5 |
| 14 | Low-frequency damping behavior of closed-cell Mg alloy foams reinforced with SiC particles显示文摘The damping properties of an Mg alloy foam and its composite foams were investigated using a dynamic mechanical thermal analyzer. The results show that the loss factors of both the Mg alloy and its composite foams are insensitive to temperature and loading frequency when the temperature is less than a critical temperature Tcrit. However, it increases when the temperature exceeds the Tcrit values, which are 200 and 250°C for the Mg alloy foam and the Mg alloy/SiCp composite foams, respectively. The Mg alloy/SiCp composite foams exhibit a higher damping capacity than the Mg alloy foam when the temperature is below 200°C. By contrast, the Mg alloy foam exhibits a better damping capacity when the temperature exceeds 250°C. The variation in the damping capacity is attributed to differences in the internal friction sources, such as the characteristics of the matrix material, abundant interfaces, and interfacial slipping caused by SiC particles, as well as to macrodefects in the Mg alloy and its composite foams. | Wen-zhan Huang Hong-jie Luo Yong-liang Mu Hao Lin Hao Du | 2017 | International Journal of Minerals,Metallurgy and Materials2017，24，6： | 5 |
| 15 | Microstructure and Texture Evolution During the Direct Extrusion and Bending–Shear Deformation of AZ31 Magnesium Alloy显示文摘AZ31 alloys were extruded by direct extrusion and bending–shear deformation(DEBS).The microstructure characteristic and texture evolution of DEBSed AZ31 sheets were investigated by electron backscattered diffraction(EBSD).It is found that DEBS technique could effectively refine grains and weaken texture.Besides,we also investigate how twinning affects dynamic recrystallization during hot extrusion.{10–12}extension twins can offer nucleation sites and enough energy to trigger dynamic recrystallization.Moreover,the character of direct extrusion and bending–shear die can lead to the activation of non-basal slip system and further dramatically weaken the basal texture of the microstructure with many preactivated basal slip systems. | Xiao-Ye Liu Li-Wei Lu Kun Sheng Tao Zhou | 2019 | Acta Metallurgica Sinica(English Letters)2019，32，6： | 5 |
| 16 | Effect of yttrium,calcium and zirconium on ignition-proof principle and mechanical properties of magnesium alloys显示文摘Good ignition-proof principle and mechanical properties were realized in Mg-Y-Ca-Zr alloy system.By adding Y and Ca elements,the ignition point of Mg-3.5Y-0.8Ca alloy was improved to over 1173 K,and the alloy could be melted in air without any protections.The ef-fect of Zr addition on the microstructures and mechanical properties of Mg-3.5Y-0.8Ca alloys were investigated,and Mg-3.5%Y-0.8%Ca-0.4%Zr alloy had good comprehensive properties with tensile strength of 190 MPa and elongation of 11%.Auger electron spectros-copy(AES) and X-ray diffraction(XRD) analysis revealed that the oxide film formed on the surface of Mg-3.5Y-0.8Ca alloy was mainly composed of Y2O3.Thermogravimetric measurements in dry air indicated that the oxidation dynamics curves measured at 773,873 and 973 K followed the cubic law.Moreover,the semiconductor characteristic of Y2O3 film and its effect on ignition-proof properties of Magnesium al-loys were discussed from the viewpoint of electrochemistry. | 樊建锋 陈志远 杨伟东 方爽 许并社 | 2012 | Journal of Rare Earths2012，30，1： | 4 |
| 17 | Effects of samarium content on microstructure and mechanical properties of Mg–0.5Zn–0.5Zr alloy显示文摘Effects of samarium (Sm) content (0, 2.0, 3.5, 5.0, 6.5 wt%) on microstructure and mechanical proper-ties of Mg-0.5Zn-0.5 Zr alloy under as-cast and as-extruded states were thoroughly investigated. Results indicate that grains of the as-cast alloys are gradually refined as Sm content increases. The dominant intermetallic ph^se changes from Mg3Sm to Mg4iSm5 till Sm content exceeds 5.0 wt%. The dynami-cally precipitated intermetallic phase during hot-extrusion in dll Sm-containing alloys is Mg3Sm. The intermetallic particles induced by Sm addition could act as heterogeneous nucleation sites for dynamic recrystallization during hot extrusion. They promoted dynamic recrystallization via the particle stim-ulated nucleation mechanism, and resulted in weakening the basal texture in the as-extruded alloys. Sm addition can significantly enhance the strength of the as-extruded Mg-0.5Zn-0.5Zr alloy at room temperature, with the optimal dosage of 3.5 wt%. The optimal yield strength (YS) and ultimate tensile strength (UTS) are 368 MPa and 383 MPa, which were enhanced by approximately 23.1% and 20.8% com-pared with the Sm-free alloy, respectively. Based on microstructural analysis, the dominant strengthening mechanisms are revealed to be grain boundary strengthening and dispersion strengthening. | Kai Guan Fanzhi Meng Pengfei Qin Qiang Yang Dongdong Zhang Baishun Li Wei Sun Shuhui Lv Yuanding Huang Norbert Hort Jian Meng | 2019 | Journal of Materials Science & Technology2019，35，7： | 4 |
| 18 | Improved corrosion resistance of Mg alloy AZ31B induced by selective evaporation of Mg using large pulsed electron beam irradiation显示文摘Large pulsed electron beam(LPEB) irradiation was employed as a surface treatment of magnesium(Mg)alloy AZ31B to enhance its corrosion and wear resistance. Selective evaporation of Mg induced by LPEB irradiation at an energy density of 5J/cm^2 for 40 cycles has led to the formation of an Al-enriched resolidified layer with nano-grained structure consisting of Mg3.1 Al0.9 metastable phase. The formation of such a re-solidified layer after LPEB irradiation has enabled a decrease in corrosion rate of Mg alloy AZ31B in 3.5% NaCl solution. Different equivalent electrical circuit models were proposed to account for the corrosion behavior of untreated Mg alloy AZ31B and those subjected to LPEB irradiation. A decrease in wear depth when compared to that of the untreated alloy suggests an increase in wear resistance of LPEB-irradiated Mg alloy AZ31B. Adhesive wear is the predominant mechanism of untreated Mg alloy AZ31B while abrasive wear mechanism dominates for LPEB-irradiated Mg alloy AZ31B. | Woo Jin Lee Jisoo Kim Hyung Wook Park | 2019 | Journal of Materials Science & Technology2019，35，5： | 4 |
| 19 | 高能电脉冲处理对镁合金腐蚀性能的影响显示文摘采用腐蚀形貌观察、动电位极化测试、电化学阻抗谱与腐蚀速度测试等方法系统地研究了高能电脉冲处理(EPT)和传统热处理(CHT)的电轧AZ31镁合金带材在3.5%NaCl(质量分数)溶液中的腐蚀行为。结果表明:高能电脉冲处理和传统热处理都能提高电轧AZ31镁合金的耐腐蚀性能,因为处理后的镁合金发生再结晶,位错密度降低;高能电脉冲处理与传统热处理相比,能更加显著地提高材料的综合力学性能,但是在改善材料耐腐蚀性能方面并不具有优势,这可能与高能电脉冲处理形成的更细小晶粒所形成更多的腐蚀微电池有关。 | 王少楠 唐国翌 徐卓辉 官磊 | 2010 | 稀有金属材料与工程2010，39，11： | 4 |
| 20 | Effect of alloying elements on magnesium alloy damping capacities at room temperature显示文摘Alloying is a good approach to increasing its strength but leads to a reduction of damping to pure magnesium.Classifying the alloying characteristics of various alloying elements in magnesium alloys and their combined effects on the damping and mechanical properties of magnesium alloys is important.In this paper,the properties of the Mg-0.6wt%X binary alloys were analyzed through strength measurements and dynamic mechanical analysis.The effects of foreign atoms on solid-solution strengthening and dislocation damping were studied comprehensively.The effect of solid solubility on damping capacity can be considered from two perspectives:the effect of single solid-solution atoms on the damping capacities of the alloy,and the effect of solubility on the damping capacities of the alloy.The results provide significant information that is useful in developing high-strength,high-damping magnesium alloys.This study will provide scientific guidance regarding the development of new types of damping magnesium alloys. | Di-qing Wan Ying-lin Hu Shu-ting Ye Zhu-min Li Li-li Li Yi Huang | 2019 | International Journal of Minerals,Metallurgy and Materials2019，26，6： | 4 |
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