典型文献
Mo and Ta addition in NbTiZr medium entropy alloy to overcome tensile yield strength-ductility trade-off
文献摘要：
In this study,single-phase NbTiZr and NbTiZr(MoTa)0.1 medium-entropy alloys(MEAs)were investigated for their use in biomedical implants.The alloys were prepared by arc melting,and were then cold-rolled,annealed,and characterized in terms of phase analysis,mechanical properties,fractography,and wear resistance.Both alloys showed a single body-centered cubic phase with superior mechanical,and tri-bological properties compared to commercially available biomedical alloys.Mo and Ta-containing MEAs showed higher tensile yield strength(1060±18 MPa))and higher tensile ductility(～20％),thus over-coming the strength-ductility trade-off with no signs of transformation-induced plasticity,twinning,or precipitation.The generalized stacking fault energy(GSFE)calculations on the{112}<111>slip system by the first-principles calculations based on density functional theory showed that the addition of less than 0.2 molar fraction of Mo and Ta lowers the GSFE curves.This behavior posits the increase in ductility of the alloy by facilitating slips although strength is also increased by solid solution strengthening.The wear resistance of both alloys against hardened steel surfaces was superior to that of commercial biomedical alloys.Thus,we concluded that NbTiZr(MoTa)0.1 MEA with good tensile ductility is a potential candidate for biomedical implants.
文献关键词：
中图分类号：
作者姓名：
Muhammad Akmal;Hyun Woo Seong;Ho Jin Ryu
作者机构：
Department of Materials Science and Engineering,KAIST,Daejeon,Yuseong-gu 34141,South Korea;Department of Nuclear and Quantum Engineering,KAIST,Daejeon,Yuseong-gu 34141,South Korea
文献出处：
引用格式：
[1]Muhammad Akmal;Hyun Woo Seong;Ho Jin Ryu-.Mo and Ta addition in NbTiZr medium entropy alloy to overcome tensile yield strength-ductility trade-off)[J].材料科学技术（英文版）,2022(14):176-185
A类：
NbTiZr,MoTa,bological,GSFE
B类：
addition,medium,entropy,overcome,tensile,yield,ductility,trade,off,In,this,study,single,phase,alloys,MEAs,were,investigated,their,use,biomedical,implants,prepared,by,arc,melting,cold,rolled,annealed,characterized,terms,analysis,mechanical,properties,fractography,wear,resistance,Both,showed,body,centered,cubic,superior,tri,compared,commercially,available,containing,higher,thus,coming,no,signs,transformation,induced,plasticity,twinning,precipitation,generalized,stacking,fault,energy,calculations,system,first,principles,density,functional,theory,that,less,than,molar,fraction,lowers,curves,This,behavior,posits,facilitating,slips,although,also,increased,solid,solution,strengthening,both,against,hardened,steel,surfaces,was,Thus,concluded,good,potential,candidate
AB值：
0.49475
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