AA3104铝合金热变形流变行为及再结晶机制的研究  

Study on Thermal Deformation Flow Behavior and Recrystallization Mechanism of AA3104 Aluminum Alloy

作　　者：朱永丽[1] 贺静[1] 田铁[2] 

机构地区：[1]重庆工程职业技术学院,重庆400037 [2]重庆理工大学,重庆400054

出　　处：《热加工工艺》2016年第10期132-134,共3页Hot Working Technology

基　　金：国家自然科学基金面上项目资助(51175533)

摘　　要：对AA3104铝合金在峰值温度为400、500℃,应变速率为2s^(-1),应变为0.01、0.1、1、10下进行热压缩试验,对退火后的微观组织进行表征。结果表明,样品在热压缩温度500℃下比400℃的动态软化效果更明显;在相同温度下,流变应力随应变的增大也逐渐增大而后趋向稳定;退火后的再结晶机制主要表现为大角度晶界迁移,吞并亚晶结构,并沿{111}优先形核并长大,形成再结晶晶粒。AA3104 aluminium alloy was deformed at the peak temperature of 400, 500 ℃, strain rate of 2 s-1 and strain of 0.01, 0.1, 1 and 10 by thermal compression test. The microstructure after annealing was characterized. The experimental results show that the dynamic softening effect of the samples at 500℃ hot compression is more obvious than at 400℃. At the same temperature, the flow stress increases gradually with the increase of strain and tends to be stable. After annealing, the large angle grain boundary migration is the main recrystallization mechanism, which can consume the subgrain structure, and the grain nucleates and grows along the { 111 } preferentially, finally, the recrystallization grains appear.

关 键 词：AA3104 热变形 退火织构 优先形核 

分 类 号：TG146.2[一般工业技术—材料科学与工程]