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Erschienen in: Journal of Materials Engineering and Performance 1/2015

01.01.2015

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

verfasst von: Y. C. Lin, Yan-Xing Liu, Ge Liu, Ming-Song Chen, Yuan-Chun Huang

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 1/2015

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Abstract

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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Metadaten
Titel
Prediction of Ductile Fracture Behaviors for 42CrMo Steel at Elevated Temperatures
verfasst von
Y. C. Lin
Yan-Xing Liu
Ge Liu
Ming-Song Chen
Yuan-Chun Huang
Publikationsdatum
01.01.2015
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 1/2015
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-014-1273-4

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