Modeling of failure modes induced by plastic strain localization in dual phase steels

W. N. Liu, K. S. Choi, X. Sun, M. A. Khaleel, Yang Ren, N. Jia, Yangdong Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Microstructure level inhomogeneities between the harder martensite phase and the softer ferrite phase render the dual phase (DP) steels more complicated failure mechanisms and associated failure modes compared to the conventionally used low alloy homogenous steels. This paper examines the failure mode DP780 steel under different loading conditions using finite element analyses on the microstructure levels. Micro-mechanics analyses based on the actual microstructures of DP steel are performed. The two-dimensional microstructure of DP steel was recorded by scanning electron microscopy (SEM). The plastic work hardening properties of the ferrite phase was determined by the synchrotron-based high-energy X-ray diffraction technique. The work hardening properties of the martensite phase were calibrated and determined based on the uniaxial tensile test results. Under different loading conditions, different failure modes are predicted in the form of plastic strain localization. The local failure mode was closely related to the stress state in the material.

Original languageEnglish
Title of host publicationSAE Technical Papers
DOIs
Publication statusPublished - 1 Dec 2008
Externally publishedYes
Event2008 World Congress - Detroit, MI, United States
Duration: 14 Apr 200817 Apr 2008

Other

Other2008 World Congress
CountryUnited States
CityDetroit, MI
Period14/4/0817/4/08

Fingerprint

Failure modes
Plastic deformation
Microstructure
Steel
Strain hardening
Martensite
Ferrite
Micromechanics
Synchrotrons
High strength steel
Plastics
X ray diffraction
Scanning electron microscopy

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

Liu, W. N., Choi, K. S., Sun, X., Khaleel, M. A., Ren, Y., Jia, N., & Wang, Y. (2008). Modeling of failure modes induced by plastic strain localization in dual phase steels. In SAE Technical Papers https://doi.org/10.4271/2008-01-1114

Modeling of failure modes induced by plastic strain localization in dual phase steels. / Liu, W. N.; Choi, K. S.; Sun, X.; Khaleel, M. A.; Ren, Yang; Jia, N.; Wang, Yangdong.

SAE Technical Papers. 2008.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Liu, WN, Choi, KS, Sun, X, Khaleel, MA, Ren, Y, Jia, N & Wang, Y 2008, Modeling of failure modes induced by plastic strain localization in dual phase steels. in SAE Technical Papers. 2008 World Congress, Detroit, MI, United States, 14/4/08. https://doi.org/10.4271/2008-01-1114
Liu WN, Choi KS, Sun X, Khaleel MA, Ren Y, Jia N et al. Modeling of failure modes induced by plastic strain localization in dual phase steels. In SAE Technical Papers. 2008 https://doi.org/10.4271/2008-01-1114
Liu, W. N. ; Choi, K. S. ; Sun, X. ; Khaleel, M. A. ; Ren, Yang ; Jia, N. ; Wang, Yangdong. / Modeling of failure modes induced by plastic strain localization in dual phase steels. SAE Technical Papers. 2008.
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