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| 1 | Effects of deformation twinning on the mechanical properties of biodegradable Zn-Mg alloys显示文摘To satisfy the property requirements for biodegradable medical implants,Zn alloyed with low levels of Mg(≤0.8 wt%)has attracted increased research interest.In the present study,deformation twinning was observed in tensile tests and twinning appears to have an adverse impact on ductility.The profuse twinning in the as-cast Zn-Mg alloys accelerated crack growth in tension due to twinning impingement which caused local stress concentrations and initiates cracking.As-rolled Zn-Mg alloys have better ductility than their as-cast counterparts due to the inhibition of twinning by the refined Mg2Zn11 intermetallic phase and the finer grain size. | Shiyang Liu Damon Kent Nghiem Doan Matthew Dargusch Gui Wang | 2019 | Bioactive Materials2019，4，1： | 5 |
| 2 | Strengthening of cast Ti–25Nb–3Mo–3Zr–2Sn alloy through precipitation of α in two discrete crystallographic orientations显示文摘 | Mohanchand Paladugu Damon Kent Gui Wang Zhentao Yu Matthew S. Dargusch | 2010 | Materials Science & Engineering A2010，，24： | 2 |
| 3 | Manufacturing of graded titanium scaffolds using a novel space holder technique显示文摘To optimize both the mechanical and biological properties of titanium for biomedical implants,a highly flexible powder metallurgy approach is proposed to generate porous scaffolds with graded porosities and pore sizes.Sugar pellets acting as space holders were compacted with titanium powder and then removed by dissolution in water before sintering.The morphology,pore structure,porosity and pore interconnectivity were observed by optical microscopy and SEM.The results show that the porous titanium has porosity levels and pore size gradients consistent with their design with gradual and smooth transitions at the interfaces between regions of differing porosities and/or pore sizes.Meanwhile,the porous titanium has high interconnectivity between pores and highly spherical pore shapes.In this article we show that this powder metallurgy processing technique,employing the novel sugar pellets as space-holders,can generate porous titanium foams with well-controlled graded porosities and pore sizes.This method has excellent potential for producing porous titanium structures for hard tissue engineering applications. | Yunhui Chen Damon Kent Michael Bermingham Ali Dehghan-Manshadi Gui Wang Cuie Wen Matthew Dargusch | 2017 | Bioactive Materials2017，2，4： | 2 |
| 4 | Strengthening of cast Ti-25Nb-3Mo-3Zr-2Sn alloy through precipitation of α in two discrete crystallographic orientations显示文摘 | Paladugu Mohanchand Kent Damon Wang Gui | | 0，，527： | 1 |
| 5 | Spheroidization behaviour of a Fe-enriched eutectic high-entropy alloy显示文摘A cost-effective Fe-enriched eutectic high-entropy alloy(EHEA),Fe35Ni25Cr25Mo15,was designed and prepared to avoid the use of expensive Co that is commonly used in HEAs.However,the as-cast Feenriched EHEA was associated with brittleness.The present work aims to evaluate the possibility and feasibility of spheroidization of the lamellar structure of the EH EA in order to improve the ductility.Due to the high cooling rate of arc-melting,the as-melted Fe35Ni25Cr25Mo15 EHEA was found to be a pseudo eutectic alloy comprised of alternantσphase(Cr(0.22)Mo0.18Fe0.6-type intermetallic)and face centred cubic(FCC)phase.The lamellar structure in the Fe-enriched EHEA remained stable up to 800Κ.The instability of the lamellar structure occurred at temperatures over 800℃,which was resulted from migration of high-density faults(i.e.lamellar termination and ledges in the lamellae).However,the Fe35Ni25Cr25Mo15EHEA still exhibited brittleness even after spheroidization at 1100℃for 168 h due to the formation of the hard and brittleσmatrix in the pseudo Fe35Ni25Cr25Mo15 EHEA as a result of decomposition of the lamellar structure.Therefore,in contrast to the softening of traditional eutectic alloys,spheroidization treatment was considered as invalid to improve the ductility of pseudo-eutectic HEA with high fraction of intermetallic phase.The present work provides a valuable re ference for those who aim to improve the ductility of brittle EHEA through spheroidization. | Yu Yin Damon Kent Qiyang Tan Michael Bermingham Ming-Xing Zhang | 2020 | Journal of Materials Science & Technology2020，47，16： | 1 |
| 6 | Materials Science and Engineering A 显示文摘 | Li Tong Kent Damon Sha Gang | 2014 | 605: 1442014，605，： | 1 |
| 7 | Degradation of differently processed Mg-based implants leads to distinct foreign body reactions(FBRs)through dissimilar signaling pathways显示文摘Mg alloys have mechanical properties compatible with human bones.However,their rapid degradation and associated foreign body reactions in vivo significantly limit their application for human implants.In this study,three differently processed Mg alloys,pure Mg(PM),cold extruded Mg alloy AZ31(CE AZ31),and fully annealed AZ31 Mg alloy(FA AZ31)were comparatively investigated for their potential as implants using a rat model.All three implanted Mg alloys do not show any impact on hepato-and renal function,nor any signs of observable changes to vital organs.Proteomics analysis of tissues directly contacting the implants 2.5 months post implantation revealed that FA AZ31 activates very few inflammation and immune associated signaling pathways;while the CE AZ31 and PM produce more significant inflammatory responses as confirmed by cytokine array analyses.Further,FA AZ31 activated pathways for cell organization and development that may improve the recovery of injured tissues.Structurally,EBSD analysis reveals that the FA AZ31 alloy has a higher ratio of first-order pyramidal orientated(10–11){10–1–2}grain texture with a value of 0.25,while PM and CE AZ31 alloys have lower ratios of first-order pyramidal orientated texture with the values of 0.16 and 0.17,respectively.This is associated with recovery and recrystallisation during annealing which promotes grain texture which exhibits enhanced degradation behaviours and induces a more limited immune response in vivo.In conclusion,the FA AZ31 demonstrated better biocompatibility and corrosion resistance and is a promising candidate for metal-based degradable implants which warrants further investigation. | Xiaosong Liu Guoqiang Chen Xiongxiong Zhong Tianfang Wang Xiaohong He Weipeng Yuan Pingping Zhang Ying Liu Dongming Cao Shu Chen Ken-ichi Manabe Zhengyi Jiang Tsuyoshi Furushima Damon Kent Yang Chen Guoying Ni Mingyong Gao Hejie Li | 2023 | Journal of Magnesium and Alloys2023，11，6： | 0 |
| 8 | Influence of strain rate and crystallographic orientation on dynamic recrystallization of pure Zn during room-temperature compression显示文摘This work investigates the strain rate dependence of dynamic recrystallization behaviour of high-purity zinc in room temperature compression under strain rates of 10^(-4)s^(-1),10-2s^(-1)and 0.5 s^(-1).Results from electron backscatter diffraction provide insight into the deformation and dynamic recrystallization mechanisms operative.Continuous dynamic recrystallization,twin-induced dynamic recrystallization,and discontinuous dynamic recrystallization are all active under compressive deformation at room temperature.Due to the high stacking fault energy of Zn,continuous dynamic recrystallization is the dominant mechanism while discontinuous dynamic recrystallization only operates in the early stages of compression at 10^(-4)s^(-1).Dynamic recrystallization kinetics are enhanced at higher strain rates(10^(-2)s^(-1)and 0.5s^(-1))due to an increased contribution from twin-induced dynamic recrystallization.The present study reveals that the controlling mechanisms for continuous dynamic recrystallization are basalslip and 2ndorder pyramidalslip activity.Because the activation of slip systems is mainly determined by crystallographic orientation,continuous dynamic recrystallization behaviour varies with grain orientation according to their propensity for basal and 2ndorder pyramidal slip. | Shiyang Liu Damon Kent Hongyi Zhan Nghiem Doan Chang Wang Sen Yu Matthew Dargusch Gui Wang | 2021 | Journal of Materials Science & Technology2021，，27： | 0 |
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