期刊
MATERIALS & DESIGN
卷 31, 期 3, 页码 1174-1179出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2009.09.038
关键词
Onset of dynamic recrystallization; Hot deformation; Critical stress; Work hardening rate; Constitutive equations
Both the critical stress and strain for initiation of dynamic recrystallization (DRX) were determined using: (1) the strain hardening rate versus stress curve, (2) the natural logarithm of strain hardening rate versus strain curve, and (3) the constitutive equations. In order to perform these analyses, the behavior of a 17-4 PH stainless steel during hot compression test was investigated at temperatures of 950-1150 degrees C and strain rates of 0.001-10 s(-1). The first and second methods were found to be the best ones for determining the critical stress and strain, respectively. The Cingara constitutive equation was also used to model the flow curves up to the peak point and subsequently was used for predicting the critical strain. In summary, for 17-4 PH stainless steel, the DRX was found to start when the normalized stress and strain reach to the values of 0.89 and 0.47, respectively. (C) 2009 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据