Modeling of Crack Behavior in Austenitic Steel Influenced by Martensitic Phase Transformation

Abstract:

A thermomechanically coupled constitutive model for finite strain elasto-plasticity is formulated and numerically implemented. The model gives a physically sound description of an initially austenitic material influenced by martensitic phase transformation. The heat dissipated by plastic slip deformation and by phase transformation is allowed to influence the material behavior and appears as a key influencing factor on the growth of the martensitic phase. The model is calibrated using a common stainless steel as prototype material, allowing numerical simulations of crack propagation to be performed. Alterations of the crack growth behavior are observed as different simulation scenarios are compared.

• Periodical: Key Engineering Materials (Volumes 452-453)
• Pages: 637-640
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.452-453.637
• Online since: November 2010
• Authors: Håkan Hallberg, Matti Ristinmaa
• Keywords: Austenite, Crack Propagation, Finite Strain, Martensite, Phase Transformation, Stainless Steel (SS)

References

[1] M. Onyuna: Deformation behaviour and martensitic transformations in metastable austenitic stainless steel and low alloy multiphase steels. PhD Thesis, Freiberg University of Mining and Technology (2003).

[2] H. Hallberg, P. Håkansson and M. Ristinmaa: International Journal of Plasticity, Vol. 23 (2007), p.1213.

[3] M. X. Zheng and P. M. Kelly: Journal of Materials Science, Vol. 37 (2002).

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[1] [2] [3] [4] [5] [6] Tool displacement [mm] F [kN].

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[1] [2] [3] [4] [5] [6] Tool displacement [mm] F [kN] 213K 313K.