陈学文,张家银,皇涛,宋克兴,朱红亮,杜昱青

• 1:河南科技大学材料科学与工程学院

摘要(Abstract)：

在温度20～175℃、应变速率0.01～1 s~(-1)、变形量为50%条件下,采用Gleeble-1500 D热模拟试验机对2A12铝合金进行了压缩实验。结果表明:2A12铝合金在该变形条件下有明显软化效应,同一应变速率下,温度由20℃升高到175℃,材料峰值应力平均降低了60 MPa。采用考虑软化系数的Voce模型建立了2A12铝合金的流动应力模型,模拟得到的流动应力值与实验值的相关系数达到0.99。基于构建的流动应力模型,采用有限元模拟软件DEFORM-3D对2A12铝合金试样在温度为20℃、应变速率为0.1 s~(-1)的条件下进行了压缩模拟。通过对比相同变形条件下的实验与有限元模拟得到的行程载荷曲线,平均相对误差为4.78%,验证了所构建的流动应力模型的准确性,为2A12铝合金冷变形加工工艺的制定提供了理论依据。

关键词(KeyWords)： 2A12铝合金;有限元模拟;Voce模型;冷变形

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51575162);; 河南省自然科学基金(162300410085)

作者(Author): 陈学文,张家银,皇涛,宋克兴,朱红亮,杜昱青

DOI: 10.13289/j.issn.1009-6264.2018-0544

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