张启航,苏娟华,张学宾,皇涛,侯文武,霍华,宋克兴

• 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:铜陵金威铜业有限公司
• 4:河南科技大学信息工程学院

摘要(Abstract)：

通过Gleeble-1500D数控动态热-力学模拟试验机对铸态C19400合金进行了高温等温热压缩试验,研究了该合金在变形温度700～950℃,应变速率0.001～10 s~(-1)条件下的高温变形行为。结果表明:在同一应变速率下,铸态C19400合金的流变应力随温度的升高而降低,在同一变形温度下,合金流变应力随应变速率的升高而升高。应变速率为0.001、0.01、0.1和1 s~(-1)时,动态软化以动态回复为主;应变速率为10 s~(-1)时,动态软化以动态再结晶为主,且再结晶程度随变形温度的升高而增加。此外,本文提出了一种基于MATLAB平台编程计算本构方程的方法,得到了基于Arrhenius双曲正弦本构关系的铸态C19400合金峰值流变应力本构方程,并计算得到该本构方程计算应力与试验应力的相对误差AARE为2.71%、相关系数R为0.9977,表明计算结果与试验结果高度吻合。

关键词(KeyWords)： 铸态C19400合金;热压缩;MATLAB;热变形行为;本构方程

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2017YFB0306400);; 河南省杰出人才创新基金(182101510003);; 河南省重点攻关项目(20174GJPT1)

作者(Author): 张启航,苏娟华,张学宾,皇涛,侯文武,霍华,宋克兴

DOI: 10.13289/j.issn.1009-6264.2019-0214

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