工业牌号铝合金的超塑性能及微观组织演化特征  

Superplastic behaviors and microstructure evolution of commercial aluminum alloys

作　　者：金泉林[1] 吴慧英[1] 周义[1] 

机构地区：[1]机械科学研究总院先进制造技术研究中心,北京100083

出　　处：《塑性工程学报》2011年第6期103-109,共7页Journal of Plasticity Engineering

摘　　要：采用实验方法研究国外广泛用于汽车车身板件冷冲压成形的工业牌号铝合金板材AA5182和6016的超塑性能,以及超塑变形中微观组织的演化特征。通过超塑性单向拉伸试验、材料变形前后的微观组织观察和自由胀形试验,揭示出铝合金AA5182具有一定的超塑性能,而铝合金6016的超塑性能很低。铝合金AA5182在温度为375℃、应变速率为1.67×10-3/s时,材料的延伸率达到210%,m值达到0.25;在温度为500℃、应变速率为1.67×10-2/s时,材料延伸率达到225%,m值达到0.35。An experimental study of superplastic behaviors and microstructure evolution of the commercial aluminum alloys 5182 and 6016 is presented in this paper.The main experiments include the superplastic tensile test,microstructure observation before and after tensile deformation,free bulging test.The obtained experimental results show that superpastic behaviors of commercial aluminum alloy AA5182 is much better than one of commercial aluminum alloy 6016.There are two best superplasticity positions for commercial aluminum alloy AA5182.The first position is temperature 375℃,strain rate 1.67×10^-3/s,maximum tension elongation 210%,m value 0.25;The second position is temperature 500℃,strain rate 1.67×10^-2/s,maximum tension elongation 225%,m value 0.35.

关 键 词：工业牌号铝合金 超塑性 晶粒尺寸与形状 自由胀形 

分 类 号：TG3[金属学及工艺—金属压力加工]