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Thermodynamic‐ M echanical Modeling of Strain‐ I nduced α′‐ M artensite Formation in Austenitic Cr– M n– N i As‐ C ast Steel
Author(s) -
Kovalev Alexander,
Wendler Marco,
Jahn Andreas,
Weiß Andreas,
Biermann Horst
Publication year - 2013
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201200340
Subject(s) - twip , materials science , martensite , austenite , nucleation , crystal twinning , microstructure , deformation (meteorology) , volume fraction , metallurgy , strain (injury) , composite material , thermodynamics , medicine , physics
The microstructure evolution during deformation and the mechanical behavior of an austenitic Cr–Mn–Ni as cast steel are investigated at various temperatures. The deformation‐induced twinning and ϵ/α′‐martensite formation – the TWIP and TRIP effects – occur in the investigate steel depending on the deformation temperature. For characterization and illustration of the TRIP/TWIP effects the STT and DTT diagrams are developed. Finally, the α′‐martensite nucleation threshold is determined, and an equation is proposed to describe the volume fraction of strain‐induced α′‐martensite as a function of the total driving force.