工业纯钛板材的轧制织构及微观组织对其孪晶和再结晶行为的依赖性  

Dependency of Rolling Texture and Microstructure on Twinning and Recrystallization Behavior of CP-Ti Sheet

作　　者：吴蔚然 周正[1] 孙焕政 彭琳[2] 王莹 李军[2] Adrien Chapuis[1] 曹华军 栾佰峰[1,3] Wu Weiran;Zhou Zheng;Sun Huanzheng;Peng Lin;Wang Ying;Li Jun;Adrien Chapuis;Cao Huajun;Luan Baifeng(International Joint Laboratory for Light Alloys(MOE),College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;Pangang Group Research Institute Company,Limited,Panzhihua 617067,China;State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学材料科学与工程学院国际轻合金联合实验室(MOE),重庆400044 [2]攀钢集团研究院有限公司,四川攀枝花617067 [3]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《稀有金属材料与工程》2021年第6期1971-1979,共9页Rare Metal Materials and Engineering

基　　金：ChongQing University-Student Research Training Program (2017172);National Natural Science Foundation of China (51505046, 51531005,51421001, 51371202);Fundamental Research Funds for the Central University (106112017CDJQJ138803, 2020CDJDPT001);Panxi Demonstration Project。

摘　　要：将工业纯钛(CP-Ti)板轧制至不同程度,随后进行退火以及进行20%的再轧制。通过电子背散射衍射(EBSD)对合金微观组织的变化进行表征。重新轧制后,{1122}<1123> 压缩孪晶和{1012}<1011>拉伸孪晶产生。可以观察到孪晶的层状结构,这是由变形孪晶的缠结以及二次和三次孪晶的产生引起的。平均晶粒尺寸和孪晶量之间没有简单的关联。0.5 h退火样品中的晶粒尺寸随其预变形程度的增加而显著减小。重新轧制倾向于使晶格的重新取向更接近法线方向。虽然织构变化和孪晶体积分数很小,但平行于RD方向的{1010}纤维织构仍然保留。Commercial pure titanium(CP-Ti) sheets were cold rolled to different amounts, then annealed, and then re-rolled by 20%.Microstructure changes were investigated via electron backscatter diffraction(EBSD). After re-rolling, {1122}<1123> contraction twins and {1012}<1011> extension twins proliferate. A twin lamellas structure can be observed, caused by tangle of deformation twins and the generation of secondary and tertiary twins. There is no simple correlation between the average grain size and the amount of twinning. The grain size significantly decreases with the increase of pre-deformation degree, for 0.5 h annealed sample. Re-rolling tends to re-orient the lattice closer to ND. While the texture change and twin volume fraction are small and the {1010}//RD fiber remains.

关 键 词：织构 再结晶 工业纯钛 孪晶 

分 类 号：TG146.23[一般工业技术—材料科学与工程]