2024铝合金在强变形过程中时效析出相的演变  

Evolution of Age-precipitated Phases in 2024 Aluminium Alloy during the Severe Plastic Deformation

作　　者：许晓嫦[1] 刘志义[1] 吴纯[2] 黄月明[2] 

机构地区：[1]中南大学材料科学与工程学院 [2]中南大学机电工程学院,湖南长沙410083

出　　处：《热处理》2005年第2期26-28,35,共4页Heat Treatment

基　　金：湖南省自然科学基金资助项目(03JJY3074)

摘　　要：利用透射电镜、X射线衍射、硬度测量等实验手段,研究了2024铝合金在“二向反复累积变形”中组织、性能的变化,特别是析出相的改变。发现:析出相粒子在“‘二向反复累积变形”过程中发生破碎细化,并随变形量的增大逐渐回溶于基体;亚稳相回溶所需的变形量低于稳定相。The change of microstructures and proerties, particularly the alteration of precipitated phases, in 2024 aluminium alloy during the biaxial alternative and accumulative deformation has been studied by Using TEM, XRD and measuring hardness. It was revealed that the precipitated phase particles had deformed and been refined as well as redissolved gradually into the matrix with an increase of the severe plastic deformation, and that the deformation extent required for the metastable phase to redissolve was smaller than the stable phase.

关 键 词：强变形 2024铝合金 时效析出相 回归 

分 类 号：TG146.2[一般工业技术—材料科学与工程] 1[金属学及工艺—金属材料]