Superelastic metastable Ti-Mo-Sn alloys with high elastic admissible strain for potential bio-implant applications  

作　　者：Shuanglei Li Jae H.Kim Seung Won Kang Jae Ho Kim Tae-Hyun Nam Jong-Taek Yeom 

机构地区：[1]Titanium Alloys Department,Metal Materials Division,Korea Institute of Materials Science(KIMS),Changwon 51508,Republic of Korea [2]Department of Materials Engineering and Convergence Technology&Research Institute for Green Energy Convergence Technology(RIGET),Gyeongsang National University,900 Gazwadong,Jinju,Gyeongnam 52828,Republic of Korea

出　　处：《Journal of Materials Science & Technology》2023年第32期45-58,共14页材料科学技术（英文版）

基　　金：the Korean Ministry of Trade,Industry and Energy(Grant No.200116572).

摘　　要：The demand for titanium alloys simultaneously having high elastic admissible strain and large recovery strain for bio-implant applications is increasing.Ni-free Ti-based shape memory alloys are promising candidates for obtaining the required multifunctional properties.In this study,a wide content range of(0-15)wt%of low-cost,toxicity-free,and high-biocompatible Sn element was added to the Ti-8Mo(wt%)alloy to study its effect on the superelastic recovery and mechanical properties of biomedical Ti-Mo-Sn alloys.By tailoring Sn content,desired multifunctional properties of high elastic admissible strain and room temperature superelasticity were achieved in the studied Ti-Mo-Sn alloys.It was found that the increase in Sn content stabilized theβphase and a singleβphase was obtained at room temperature in Ti-8Mo-(13,15)Sn alloys.The addition of Sn modified the lattice parameters of theα″martensite andβphase and affected the lattice deformation stain ofβ→α″.The lattice deformation strain along the[011]βdirection was found to be decreased by-0.26%/wt%Sn.The room temperature superelasticity with a recovery strain of 3.1%and an elastic admissible strain of 1%was obtained in the Ti-8Mo-13Sn alloy.As Sn content increased to 15 wt%,a high elastic admissible strain of 1.56%and a recovery strain of 2.0%were obtained.These Ti-Mo-Sn alloys with excellent multifunctional properties are promising candidates for bio-implant applications.

关 键 词：Ti-Mo-Sn alloy Shape memory alloy Elastic admissible strain Elastic modulus SUPERELASTICITY 

分 类 号：TG146.23[一般工业技术—材料科学与工程]