刘阳阳,文九巴,贺俊光,高军伟

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心
• 3:中原利达铁路轨道技术发展有限公司

摘要(Abstract)：

利用Gleeble-1500D热模拟试验机和Deform-3D数值模拟平台,研究了5052铝合金在300、350、400、450和500℃,应变速率为0.01、0.1、1和10 s~(-1),压缩量为60%(真应变0.92)的热压缩过程。结果表明:数值模拟得到的峰值应力与实验峰值应力一致;在热压缩试样的纵切面上选取了4个观测点:P1(中心位置),P2(圆柱面中间位置),P3(端面与圆柱面交线位置)和P4(端面中心位置),分析其变形模拟结果,并利用显微镜观察350℃,0.01 s~(-1)变形条件下压缩试样上对应4点附近显微组织,从显微组织的变化规律可见,热压缩过程中试样不同位置的应变不均匀,其应变规律为:ε_(P3)>ε_(P1)>ε_(P2)>ε_(P4)。

关键词(KeyWords)： 5052铝合金;热压缩实验;本构关系;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 河南省自然科学基金(162300410213);; 河南省教育厅重点攻关项目(14A430001,15A430024)

作者(Author): 刘阳阳,文九巴,贺俊光,高军伟

DOI: 10.13289/j.issn.1009-6264.2017-0280

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