6061铝合金楔横轧塑性成形显微组织分析  

Microstructure of Cross Wedge Rolled 6061 Aluminum Alloy

作　　者：赵培峰[1] 宋克兴[1] 国秀花[1] 任广升[2] 沈智[2] 徐春国[2] 

机构地区：[1]河南科技大学材料科学与工程学院 [2]北京机电研究所

出　　处：《特种铸造及有色合金》2008年第6期414-416,共3页Special Casting & Nonferrous Alloys

摘　　要：通过对6061铝合金试样的显微组织分析可知,在楔横轧变形过程中,6061铝合金的软化机制为动态回复,其平均应变速率的大小应在1～10s-1之间。通过对试样透射电镜的分析并结合各变形条件下的应变速率,确定了亚晶直径d与Zener-Hollomon参数z之间的关系,可用d-1=-2.7955+0.0664lnz和z=εexp(276 800/RT)来表达。The microstructure of cross wedge rolled 6061 aluminum alloy was observed.The results indicate that the soft mechanism of the 6061 aluminum alloy exhibits dynamic recovery and the average strain rate is in range of 1~10 s-1 in the process of cross wedge rolling.The relationship between meta-crystalline size and z parameters is determined by SEM analysis combining with strain rate at different strains,providing a reference to forming aluminum alloy.

关 键 词：6061铝合金 动态回复 亚晶 楔横轧 

分 类 号：TG339[金属学及工艺—金属压力加工]