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Title: Predicting Deformation Limits of Dual-Phase Steels Under Complex Loading Paths

Abstract

The deformation limits of various DP980 steels are examined in this study with deformation instability theory. Under uniaxial tension, overall stress-strain curves of the material are estimated based on simple rule of mixture (ROM) with both iso-strain and iso-stress assumptions. Under complex loading paths, actual microstructure-based finite element (FE) method is used to explicitly resolve the deformation incompatibilities between the soft ferrite and hard martensite phases. The results show that, for uniaxial tension, the deformation instability theory with iso-strain-based ROM can be used to provide the lower bound estimate of the uniform elongation (UE) for the various DP980 considered. Under complex loading paths, the deformation instability theory with microstructure-based FE method can be used in examining the effects of various microstructural features on the deformation limits of DP980 steels.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1371966
Report Number(s):
PNNL-SA-122713
Journal ID: ISSN 1047-4838; 453060037
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 69; Journal Issue: 6; Journal ID: ISSN 1047-4838
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Cheng, G., Choi, K. S., Hu, X., and Sun, X. Predicting Deformation Limits of Dual-Phase Steels Under Complex Loading Paths. United States: N. p., 2017. Web. doi:10.1007/s11837-017-2333-7.
Cheng, G., Choi, K. S., Hu, X., & Sun, X. Predicting Deformation Limits of Dual-Phase Steels Under Complex Loading Paths. United States. doi:10.1007/s11837-017-2333-7.
Cheng, G., Choi, K. S., Hu, X., and Sun, X. Wed . "Predicting Deformation Limits of Dual-Phase Steels Under Complex Loading Paths". United States. doi:10.1007/s11837-017-2333-7.
@article{osti_1371966,
title = {Predicting Deformation Limits of Dual-Phase Steels Under Complex Loading Paths},
author = {Cheng, G. and Choi, K. S. and Hu, X. and Sun, X.},
abstractNote = {The deformation limits of various DP980 steels are examined in this study with deformation instability theory. Under uniaxial tension, overall stress-strain curves of the material are estimated based on simple rule of mixture (ROM) with both iso-strain and iso-stress assumptions. Under complex loading paths, actual microstructure-based finite element (FE) method is used to explicitly resolve the deformation incompatibilities between the soft ferrite and hard martensite phases. The results show that, for uniaxial tension, the deformation instability theory with iso-strain-based ROM can be used to provide the lower bound estimate of the uniform elongation (UE) for the various DP980 considered. Under complex loading paths, the deformation instability theory with microstructure-based FE method can be used in examining the effects of various microstructural features on the deformation limits of DP980 steels.},
doi = {10.1007/s11837-017-2333-7},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
issn = {1047-4838},
number = 6,
volume = 69,
place = {United States},
year = {2017},
month = {4}
}

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