On deformation twinning in a 17.5% Mn-TWIP steel

A physically based phenomenological model

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

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

TWinning Induced Plasticity (TWIP) steel is a typical representative of the 2nd generation advanced high strength steels (AHSS) which exhibits a combination of high strength and excellent ductility due to the deformation twinning mechanisms. This paper discusses the principal features of deformation twinning in faced-centered cubic austenitic steels and shows how a physically based macroscopic model can be derived from microscopic-level considerations. In fact, a dislocation-based phenomenological model, with internal state variables including dislocation density and micro-twins volume fraction describing the microstructure evolution during deformation process, is proposed to model the deformation behavior of TWIP steels. The originality of this work lies in the incorporation of a physically based model on twin nucleation and volume fraction evolution in a conventional dislocation-based approach. Microstructural level experimental observations with scanning electron microscope (SEM) and transmission electron microscope (TEM) techniques together with the macroscopic quasi-static tensile test, for the TWIP steel Fe-17.5. wt.% Mn-1.4. wt.% Al-0.56. wt.% C, are used to validate and verify the modeling assumptions. The model could be regarded as a semi-phenomenological approach with sufficient links between microstructure and the overall mechanical properties, and therefore offers good predictive capabilities. Its simplicity also allows a modular implementation in finite element-based metal forming simulations.

Original languageEnglish
Pages (from-to)1402-1408
Number of pages7
JournalMaterials Science and Engineering A
Volume528
Issue number3
DOIs
Publication statusPublished - 25 Jan 2011
Externally publishedYes

Fingerprint

Steel
Twinning
twinning
plastic properties
Plasticity
steels
Volume fraction
Electron microscopes
electron microscopes
metal forming
microstructure
Microstructure
high strength steels
Austenitic steel
Metal forming
tensile tests
high strength
ductility
High strength steel
Ductility

Keywords

  • Deformation mechanisms
  • Dislocation
  • Microstructure
  • Microtwins
  • Stacking fault energy
  • TWIP steel

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

On deformation twinning in a 17.5% Mn-TWIP steel : A physically based phenomenological model. / Soulami, A.; Choi, K. S.; Shen, Y. F.; Liu, W. N.; Sun, X.; Khaleel, M. A.

In: Materials Science and Engineering A, Vol. 528, No. 3, 25.01.2011, p. 1402-1408.

Research output: Contribution to journalArticle

Soulami, A. ; Choi, K. S. ; Shen, Y. F. ; Liu, W. N. ; Sun, X. ; Khaleel, M. A. / On deformation twinning in a 17.5% Mn-TWIP steel : A physically based phenomenological model. In: Materials Science and Engineering A. 2011 ; Vol. 528, No. 3. pp. 1402-1408.
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