Characterization of the fracture toughness of TRIP 800 sheet steels using microstructure-based finite element analysis

A. Soulami, K. S. Choi, W. N. Liu, X. Sun, M. A. Khaleel

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

Abstract

Recently, several studies conducted by automotive industry revealed the tremendous advantages of Advanced High Strength Steels (AHSS). TRansformation Induced Plasticity (TRIP) steel is one of the typical representative of AHSS. This kind of materials exhibits high strength as well as high formability. Analyzing the crack behaviour in TRIP steels is a challenging task due to the microstructure level inhomogeneities between the different phases (ferrite, bainite, austenite, martensite) that constitute these materials. This paper aims at investigating the fracture resistance of TRIP steels. For this purpose, a micromechanical finite element model is developed based on the actual microstructure of a TRIP 800 steel. Uniaxial tensile tests on TRIP 800 sheet notched specimens were also conducted and tensile properties and R-curves (Resistance curves) were determined. The comparison between simulation and experimental results leads us to the conclusion that the method using microstructure-based representative volume element (RVE) captures well enough the complex behavior of TRIP steels. The effect of phase transformation, which occurs during the deformation process, on the toughness is observed and discussed.

Original languageEnglish
Title of host publicationSAE Technical Papers
DOIs
Publication statusPublished - 1 Dec 2009
Externally publishedYes

Fingerprint

Steel sheet
Plasticity
Fracture toughness
Finite element method
Microstructure
Steel
High strength steel
Bainite
Formability
Tensile properties
Automotive industry
Martensite
Austenite
Toughness
Ferrite
Phase transitions
Cracks

ASJC Scopus subject areas

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

Cite this

Characterization of the fracture toughness of TRIP 800 sheet steels using microstructure-based finite element analysis. / Soulami, A.; Choi, K. S.; Liu, W. N.; Sun, X.; Khaleel, M. A.

SAE Technical Papers. 2009.

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

Soulami, A. ; Choi, K. S. ; Liu, W. N. ; Sun, X. ; Khaleel, M. A. / Characterization of the fracture toughness of TRIP 800 sheet steels using microstructure-based finite element analysis. SAE Technical Papers. 2009.
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