Temperature dependence of microstructure and texture in cold drawn aluminum wire  

冷拔铝线材显微组织和织构演变的温度相关性（英文）

作　　者：Xiao-guang MA Jian CHEN Yang YANG Lei LI Zheng CHEN Wen YAN 马晓光;陈建;杨洋;李磊;陈铮;严文(西北工业大学材料学院凝固国家重点实验室,西安710072;西安工业大学材料与化工学院,西安710021)

机构地区：[1]State Key Laboratory of Solidification Processing, School of Materials Science and Engineering,Northwestern Polytechnical University, Xi’an 710072, China [2]School of Materials Science and Chemical Engineering, Xi’an Technological University, Xi’an 710021, China

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第4期763-770,共8页中国有色金属学报（英文版）

基　　金：Projects(51471123,51171135)supported by the National Natural Science Foundation of China;Projects(2012K07-08,2013KJXX-61)supported by the Natural Science Foundation of Shaanxi Province,China;Project(2013JC14)supported by the Industrialization Program of Shaanxi Province,China

摘　　要：The effect of strain and drawing temperature on the evolution of microstructure and fiber textures of aluminum wiresdrawn at room temperature and cryogenic temperature was investigated by TEM and EBSD observations.The results show that lowangle boundaries frequency increases and high angle boundaries frequency decreases with strain increasing when the strain is low.Athigh strain,most of grain and dislocation boundaries are parallel to the drawn direction and low angle boundaries frequencydecreases and high angle boundaries frequency increases with strain increasing.The decrease of deformation temperature leads tomicrostructure finer and low angle boundaries frequency increasing.Texture analysis indicates that volume fraction of complextexture component decreases with strain increasing and a mixture of?111?and?100?fiber texture forms at high strain.?111?is stableat low strains but?100?becomes stable at high strain.The decrease of temperature can enhance the stability of?111?orientation athigh strain.采用TEM和EBSD研究变形量和变形温度对冷拔铝线材的显微组织和纤维织构演变的影响。结果表明,在低应变量下,随着应变量的增加,低角度界面数量增加而高角度界面数量减少。在高应变量下,绝大部分晶界和位错界面与冷拔方向平行。但是在高应变量下,随着应变量的增大,低角度界面数量减少而高角度界面数量增加。降低形变温度会导致显微组织细化,低角度界面数量增加。织构分析表明,随着应变量的增大,复杂织构组分的体积分数降低,在高应变量下形成?111?和?100?混合织构。在低应变下,?111?织构组分比较稳定,而在高应变下,?100?织构组分趋于稳定。降低形变温度使?111?织构组分在高应变下的稳定性增强。

关 键 词：aluminum wire cryogenic drawn deformation dislocation boundary fiber texture misorientation angle distribution 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG359[金属学及工艺—金属材料]