张杰,李志辉,黄树晖,李锡武,刘红伟,张永安,熊柏青

• 1:北京有色金属研究总院有色金属材料制备加工国家重点实验室

摘要(Abstract)：

采用Gleeble-1500热模拟试验机测定7085铝合金在变形温度为350~450℃,应变速率为0.001、0.01、0.1和1 s~(-1)时的真应力-应变曲线,借助光学显微镜(OM)和背散射电子衍射(EBSD)对变形后的试样进行组织分析,研究应变速率对7085铝合金流变应力和微观组织的影响。结果表明:稳态流变应力随变形速率的增大而增大,真应力-应变曲线可分为加工硬化阶段、动态软化阶段和稳态阶段;再结晶晶粒呈链状分布在晶界处,随着应变速率的降低,再结晶晶粒的尺寸和再结晶分数不断增大。

关键词(KeyWords)： 7085铝合金;流变应力;动态再结晶;组织演变

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划资助项目(2016YFB0300803,2016YFB0300903)

作者(Author): 张杰,李志辉,黄树晖,李锡武,刘红伟,张永安,熊柏青

DOI: 10.13289/j.issn.1009-6264.2018-0172

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