近β型钛合金细径薄壁管材的超弹性行为研究  

Super-elastic Properties of Near β-type Titanium Alloy Thin-tube

作　　者：刘汉源[1] 于振涛[1] 余森[1] 麻西群[1] 王昌[1] 程军[1] 车永平[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《中国材料科技与设备》2015年第6期5-7,10,共4页Chinese Materials Science Technology & Equipment

基　　金：国家自然科学基金项目（31400821）;陕西省自然科学基金项目（2015JU3090）;国家科技合作专项项目（2014DFA30880）

摘　　要：采用循环拉伸实验研究了新型近β型TLM钛合金（Ti-25Nb-3Zr-3M0—2Sn）超弹性特性，探讨了在不同预变形量（1％，2％，3％，3．7％（冷轧态为3．8％））下冷轧、固溶及时效处理对超弹性的影响。结果表明：回复应变比（R）与非弹性回复应变比（s）均随着预变形量的增大而降低，冷轧态具有较好的R值，而固溶态具有较好的S值。相比之下，690℃固溶有相对较好的R与s值；随着时效时间增加，R与s值降低，对超弹性不利。三种状态的弹性模量均随预变形量的增大而降低，最大的降幅可达20GPa。The super- elastic properties of the new β- type TLM titanium alloy （Ti- 25Nb- 3Zr- 3Mo- 2Sn） were studied by cyclic tensile test, and the effect of c01d rolling, solid solution and aging treatment on the properties with pre- strain （1%, 2%, 3%, 3. 7% （3.8%）） were investigated. The total recovery strain ratio （R） and the pseudo-elastic strain ratio （S） were decreased with the amount of pre-strain increased. The cold-rolled state has the higher R value, while the ST-states has the higher S value. In contrast, 690℃ ST-state has a relatively good R and S values. With the increase of ag- ing time, the R and S values are decreased, which is disadvantageous to the super elasticity. The elastic modulus of the three states decreases with the increase of the pre-strain, the largest decline is 20GPa.

关 键 词：超弹性 TLM钛合金 回复应变比 非弹性回复应变比 

分 类 号：TG166.5[金属学及工艺—热处理]