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

被引：24

作者：

Lin, Y. C. ^{[1
,2
]}

Liu, Yan-Xing ^{[1
,2
]}

Liu, Ge ^{[1
,2
]}

Chen, Ming-Song ^{[1
,2
]}

Huang, Yuan-Chun ^{[1
,2
]}

机构：

[1] Cent S Univ, Sch Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China

[2] State Key Lab High Performance Complex Mfg, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2015年 / 24卷 / 01期

基金：

中国国家自然科学基金;

关键词：

42CrMo steel; damage model; ductile fracture; finite element simulations; LOW-ALLOY STEEL; TENSILE DEFORMATION BEHAVIORS; NI-BASED SUPERALLOY; DUAL-PHASE STEELS; MICROSTRUCTURAL EVOLUTION; HOT-DUCTILITY; DYNAMIC RECRYSTALLIZATION; STRAIN-RATE; METADYNAMIC RECRYSTALLIZATION; STATIC RECRYSTALLIZATION;

D O I：

10.1007/s11665-014-1273-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页码：221 / 228

页数：8

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