外科植入物用Ti-11Mo-6Zr-4.5Sn-3Nb合金板材的室温弹性变形行为研究  

Study on Room-temperature Elastic Deformation Behavior of Ti-11Mo-6Zr-4.5Sn-3Nb Alloy Sheet for Surgical Implant Applications

作　　者：程军[1] 余森[1] 李金山[2] 盖晋阳 陈靓瑜[4] 张金勇 刘俭涛 宋宏杰 张亚峰[1] 麻西群[1] 王鸿川 CHENG Jun;YU Sen;LI Jinshan;GAI Jinyang;CHEN Liangyu;ZHANG Jinyong;LIU Jiantao;SONG Hongjie;ZHANG Yafeng;MA Xiqun;WANG Hongchuan(Northwest Institute for Nonferrous Metal Research,Shaanxi Key Laboratory of Biomedical Metal Materials,Xi'an 710016,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;School of Material Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China;School of Materials and Physics,China University of Mining and Technology,Xuzhou 221116,China;The First Affiliated Hospital of Xi'an Jiaotong University,Xi’an 710061,China;School of Material Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]西北有色金属研究院陕西省医用金属材料重点实验室,陕西西安710016 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072 [3]中南大学粉末冶金国家重点实验室,湖南长沙410083 [4]江苏科技大学材料科学与工程学院,江苏镇江212100 [5]中国矿业大学材料与物理学院,江苏徐州221116 [6]西安交通大学第一附属医院,陕西西安710061 [7]东北大学材料科学与工程学院,辽宁沈阳110819

出　　处：《热加工工艺》2022年第16期72-77,共6页Hot Working Technology

基　　金：国家自然科学基金项目(51901193,51861029,51801162,32071327);粉末冶金国家重点实验室开放课题项目(2021年);陕西省重点研发计划项目(2020GY-251);西安市未央区科技计划项目(201905);西安市科技计划项目(2020KJRC0141)。

摘　　要：研究了一种外科植入物用新型亚稳定β型Ti-11Mo-6Zr-4.5Sn-3Nb合金板材的室温弹性变形行为。结果表明:在室温拉伸加载-卸载过程中,固溶态合金的工程应力-应变曲线表现出显著的“双屈服”特征。基于应力诱发α"马氏体相转变的作用,在首个屈服点出现之前,曲线表现出近似非线性弹性变形的特征。合金板材经时效热处理后,由拉伸测试实验所确定的初始弹性模量数值与时效α析出相的数量无关,而是随着β晶粒尺寸和α沉淀相尺寸的减小而逐渐增加。The room-temperature elastic deformation behavior for a novel meta-stable β-type Ti-11Mo-6Zr-4.5Sn-3Nb alloy sheet for surgical implant applications was discussed in present investigation. The results show that the engineering stress-engineering strain curves of solution treated alloy sheet present a noticeable “double yielding” phenomenon during the tensile loading-unloading testing at room temperature. Based on the influence of stress-induced α" martensite phase transition,the obtained curves displays the features of approximate non-linear elastic deformation before the appearance of the first yielding point. The initial elastic modulus values determined by the tensile test are not associated with the amount of aged α precipitated phases after the sheet subjected to aging treatment. On the contrary, the values gradually increase with the decrease of the size of β grain as well as α precipitated phase.

关 键 词：Ti-11Mo-6Zr-4.5Sn-3Nb合金板材 热处理 弹性变形 应力诱发马氏体相转变 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG166.5[金属学及工艺—金属材料]