Influence of interstitial content on mechanical properties of new type of near α titanium alloy at cryogenic temperature  

作　　者：刘伟 杜宇 杨冠军 

机构地区：[1]Northwest Institute for Nonferrous Metal Research

出　　处：《中国有色金属学会会刊：英文版》2007年第A01期509-513,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(2007CB613807) supported by National Basic Research Program of China

摘　　要：The influence of interstitial content on mechanical properties of a new type of near α titanium alloy(Ti-Zr-Mo-Nb-Sn) at cryogenic temperature was studied. The results show that interstitial content affects the mechanical properties of the alloy at cryogenic temperature. Interstitial element atoms solving into lattice causes the increasing of degree of distortion,which limits the sliding and twinning of dislocations. Reducing interstitial content is beneficial to generation of dislocation sliding and deformation twins. With interstitial element content reducing,the impact toughness and the elongation of the alloy decrease rapidly while the strength decreases weakly. To obtain good over-all properties at cryogenic temperature,the interstitial element content in this alloy must be controlled to extra low grade.The influence of interstitial content on mechanical cryogenic temperature was studied. The results show that properties of a new type of near a titanium alloy （Ti-Zr-Mo-Nb-Sn） at interstitial content affects the mechanical properties of the alloy at cryogenic temperature. Interstitial element atoms solving into lattice causes the increasing of degree of distortion, which limits the sliding and twinning of dislocations. Reducing interstitial content is beneficial to generation of dislocation sliding and deformation twins. With interstitial element content reducing, the impact toughness and the elongation of the alloy decrease rapidly while the strength decreases weakly. To obtain good over-all properties at cryogenic temperature, the interstitial element content in this alloy must be controlled to extra low grade.

关 键 词：钛合金 氧化技术 温度 控制技术 

分 类 号：TG115[金属学及工艺—物理冶金]