剪切模式下Ti-1300合金组织及织构演变规律  

Microstructure and texture evolution of Ti-1300 alloy during shear deformation

作　　者：王欣晗 杨西荣[1] 卢金文[2] 刘晓燕[1] 赵永庆[2] WANG Xin-han;YANG Xi-rong;LU Jin-wen;LIU Xiao-yan;ZHAO Yong-qing(School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an,710055,China;Northwest Institute for Non-ferrous Metal Research,Xi'an 710016,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]西北有色金属研究院,陕西西安710016

出　　处：《塑性工程学报》2019年第5期147-152,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51641107;51474170)

摘　　要：通过光学显微镜(OM)、透射电子显微镜(TEM)、X射线衍射(XRD)等检测方法,研究等通道转角挤压变形后Ti-1300合金的组织与性能。研究结果表明:Ti-1300合金经过ECAP变形,发生晶粒转动、晶内多系滑移以及晶界处螺型位错与刃型位错的混合位错交错排列的协调作用,致使晶界不能破碎,原始晶界清晰可见,晶内出现大量的相互交错的剪切滑移带,显微组织中存在大量平行细密的板条组织以及位错团、位错胞,位错密度增大,但在整个ECAP变形过程中并未产生形变诱导ω或α″相。织构分析结果表明ECAP变形过程中Ti-1300合金初始(110)[111]织构逐渐转变为α织构,并形成D织构及立方织构。The microstructure and properties of Ti-1300 alloy after equal channel angular pressing(ECAP)were investigated by optical metallography(OM),transmission electron microscopy(TEM)and X-ray diffraction(XRD).The results indicate that the grains of Ti-1300 alloy exhibit the coordination among grain rotation,intragranular multi-slide,and mixed modes of screw dislocations and edge dislocations staggeringly distributed at grain boundaries,and thus the grain boundaries cannot be broken.Besides,a lot of interlaced shear glide bands are founded in grains with clear original grain boundaries.The microstructures of the processed Ti-1300 alloy exist parallel and fine laths,dislocations and dislocation cells.The dislocation density increases,while there are no deformation inducedωorα″phase occurd during the ECAP deformation.The results of the texture analysis indicate that the initial(110)[111]texture of Ti-1300 alloy gradually transforms toαtexture and finally forms D texture and cube texture during the ECAP deformation.

关 键 词：Ti-1300合金 ECAP变形 组织 织构 

分 类 号：TG113.251[金属学及工艺—物理冶金]