Prediction of Ductile Fracture Behaviors for 42CrMo Steel at Elevated Temperatures

被引：0
作者：
Y. C. Lin
Yan-Xing Liu
Ge Liu
Ming-Song Chen
Yuan-Chun Huang
机构：
[1] Central South University,School of Mechanical and Electrical Engineering
[2] State Key Laboratory of High Performance Complex Manufacturing,undefined
来源：
Journal of Materials Engineering and Performance | 2015年 / 24卷
关键词：
42CrMo steel; damage model; ductile fracture; finite element simulations;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The ductile fracture behaviors of 42CrMo steel are studied by hot tensile tests with the deformation temperature range of 1123-1373 K and strain rate range of 0.0001-0.1 s−1. Effects of deformation temperature and strain rate on the flow stress and fracture strain of the studied steel are discussed in detail. Based on the experimental results, a ductile damage model is established to describe the combined effects of deformation temperature and strain rate on the ductile fracture behaviors of 42CrMo steel. It is found that the flow stress first increases to a peak value and then decreases, showing an obvious dynamic softening. This is mainly attributed to the dynamic recrystallization and material intrinsic damage during the hot tensile deformation. The established damage model is verified by hot forging experiments and finite element simulations. Comparisons between the predicted and experimental results indicate that the established ductile damage model is capable of predicting the fracture behaviors of 42CrMo steel during hot forging.
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页码：221 / 228
页数：7
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