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Alexander Kovalev, Marco Wendler, Andreas Jahn, Andreas Weiß and Horst Biermann Thermodynamic-Mechanical Modeling of Strain-Induced α′-Martensite Formation in Austenitic Cr–Mn–Ni As-Cast Steel Advanced Engineering Materials 15

Article first published online: 14 MAY 2013 | DOI: 10.1002/adem.201200340

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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.

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