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

Here in this study, the deformation limits of various DP980 steels are examined with the deformation instability theory. Under uniaxial tension, overall stress–strain curves of the material are estimated based on a simple rule of mixture (ROM) with both iso-strain and iso-stress assumptions. Under complex loading paths, an actual microstructure-based finite element (FE) method is used to resolve the deformation compatibilities explicitly 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:
 [1] ;  [1] ;  [1] ;  [1]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Report Number(s):
PNNL-SA-122713
Journal ID: ISSN 1047-4838; PII: 2333
Grant/Contract Number:
EE0005976; AC05-76RL01830
Type:
Accepted Manuscript
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
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1357065

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., 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.. 2017. "Predicting Deformation Limits of Dual-Phase Steels Under Complex Loading Paths". United States. doi:10.1007/s11837-017-2333-7. https://www.osti.gov/servlets/purl/1357065.
@article{osti_1357065,
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 = {Here in this study, the deformation limits of various DP980 steels are examined with the deformation instability theory. Under uniaxial tension, overall stress–strain curves of the material are estimated based on a simple rule of mixture (ROM) with both iso-strain and iso-stress assumptions. Under complex loading paths, an actual microstructure-based finite element (FE) method is used to resolve the deformation compatibilities explicitly 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},
number = 6,
volume = 69,
place = {United States},
year = {2017},
month = {4}
}