Simulation of strain induced austenite‐martensite transformation

Grain refinement due to phase transformation is an effective method for improving the mechanical properties of steel. An approach is proposed in the present work based on the FEM, for numerical simulation of the microstructure evolution. Grain refinement in 304 stainless steel is considered. Coupling of the thermoplastic deformation with microstructure evolution is realized. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Modelling of a combined process of thermomechanical treatment of 304 stainless steel

Bontcheva

Parashkevova

Petzov

2008

Proc Appl Math and Mech

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Observation of Reverse Transformation of α-ε-γ in ultrafine - grainedFe-Ni-MnAge Hardenable Martensitic Steel

Ghasemi-Nanesa

Nili‐Ahmadabadi

Shirazi

et al. 2012

Int. J. Mod. Phys. Conf. Ser.

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Fe -10 Ni -7 Mn ( wt %) martensitic steel is a member of ultrahigh strength steels. This alloy is ductile in the solution annealed condition and shows good age hardenability but it suffers from severe embrittlement after aging. Discontinuous coarsening of grain boundary precipitates was found as the main source of embrittlement. In this paper the effect of cold rolling on the mechanical properties and phase stability of Fe -10 Ni -7 Mn steel was investigated. Cold rolling for 20%, 60%, and 90% were carried out on a solution annealed material with subsequent aging at 753 K. X- ray diffraction results and transmission electron microscopy (TEM) micrographs showed the presence of austenite in severely cold rolled samples. This austenite is likely formed as a result of deformation, and it seems to originate from a reverse transformation from bcc-martensite to hcp-martensite to austenite, stimulated by increasing the amount of deformation. This transformation improves the mechanical properties in this steel while in as annealed and aged condition it has premature fracture and zero ductility.

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Simulation of strain induced austenite‐martensite transformation

Cited by 2 publications

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Modelling of a combined process of thermomechanical treatment of 304 stainless steel

Modelling of a combined process of thermomechanical treatment of 304 stainless steel

Observation of Reverse Transformation of α-ε-γ in ultrafine - grainedFe-Ni-MnAge Hardenable Martensitic Steel

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