Texture of friction stir welded Ti-6Al-4V alloy  

Ti-6Al-4V钛合金搅拌摩擦焊缝的织构(英文)

作　　者：周利[1,2,3] 刘会杰[1] 吴林志[3] 

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001 [2]哈尔滨工业大学(威海)山东省特种焊接技术重点实验室,威海264209 [3]哈尔滨工业大学复合材料与结构研究所,哈尔滨150001

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第2期368-372,共5页中国有色金属学报（英文版）

基　　金：Project(2010CB731704)supported by the National Basic Research Program of China;Project(AWJ-M13-11)supported by State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,China;Project(2012M511470)supported by China Postdoctoral Science Foundation

摘　　要：Theα＋βtitanium alloy, Ti-6Al-4V, was welded by friction stir welding using a W-Re pin tool, and the defect-free weld was produced with proper welding parameters. Texture of the Ti-6Al-4V friction stir weld was studied by orientation imaging microscopy. The as-received Ti-6Al-4V sheet mill annealed was composed of elongated primary α and transformed β. A typical rolling texture was observed in the base material. The microstructure of the stir zone was significantly different from that of the base material. The stir zone was characterized by the presence of considerable amount of equiaxed dynamically recrystallized grains and a texture around{Ф1=30°,φ=62°,Ф2=30°}was developed during the friction stir welding.采用W-Re合金搅拌头对α+β双相Ti-6Al-4V钛合金进行搅拌摩擦焊并在合适的工艺参数下获得无缺陷焊缝,利用取向成像显微镜对Ti-6Al-4V钛合金搅拌摩擦焊缝的织构进行研究。Ti-6Al-4V钛合金母材为轧制退火态,组织由变形的初生α相和转变β组织构成,具有典型的轧制织构。焊核区组织与母材明显不同,由大量的等轴动态再结晶晶粒组成,并在搅拌摩擦焊过程中形成{φ1=30°,φ=62°,φ2=30°}取向的织构。

关 键 词：friction stir welding titanium alloy TEXTURE orientation imaging microscopy 

分 类 号：TG453.9[金属学及工艺—焊接]