摘要
采用光学显微镜、透射电镜(TEM)、扫描电镜(SEM)、X射线衍射、硬度测试、拉伸试验等对冷轧5083铝合金的退火行为、织构演变及塑性各向异性参数进行了分析计算。结果表明:冷轧变形量为70%的5083铝合金起始再结晶温度为240℃,终止再结晶温度为260℃。完全再结晶退火后,再结晶织构以Cube、R-Cube和Goss织构为主。在260~320℃范围内,随退火温度的升高,β纤维织构向Cube织构和Goss织构转变程度增加;Cube织构向R-Cube织构的转变先增加后减少。300℃退火后,RCube织构含量最高,Cube织构次之,Goss织构最少;合金的厚向各向异性指数(r)最高为0.909、平面各向异性指数(Δr)的绝对值较小为0.242,表明该状态下合金具有较好的冲压成形性能和较低的深冲制耳率。
The annealing behavior,texture evolution and plastic anisotropy parameters of cold rolled 5083 aluminum alloy were analyzed and calculated by means of optical microscope,transmission electron microscopy(TEM)and scanning electron microscopy(SEM),X-ray diffraction,hardness test and tensile test.The results show that the initial recrystallization temperature of the 5083 aluminum alloy with cold rolling deformation of 70%is 240℃,and the ending recrystallization temperature is 260℃.After complete recrystallization annealing,the main recrystallization textures of the alloy are Cube,R-Cube and Goss.In the range of 260-320℃,with the increase of annealing temperature,the degree of transformation ofβ-fiber texture to Cube texture and Goss texture increases,and the transformation of Cube texture to R-Cube texture increases first and then decreases.After annealing at 300℃,the content of the R-Cube texture is the highest,the cube texture is the second,and the Goss texture is the least;the thickness anisotropy indexΔr value of the alloy is the highest,which is 0.909,and the absolute value of the planar anisotropy indexΔr is 0.242,which indicates that the alloy has better stamping formability and lower earring ratio during deep drawing.
作者
李慧中
高峰
李鹏伟
梁霄鹏
LI Hui-zhong;GAO Feng;LI Peng-wei;LIANG Xiao-peng(School of Materials Science and Engineering,Central South University,Changsha 410083,China;College of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414000,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2020年第5期57-65,共9页
Transactions of Materials and Heat Treatment
基金
国家重点研发计划项目(2018YFB2001800)。
关键词
5083铝合金
退火温度
织构
塑性各向异性
5083 aluminum alloy
annealing temperature
texture
plasticity anisotropy
