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Characterization and Simulation of Deformation-Induced Martensitic Transformations in Medium-Manganese Steels

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URI: http://hdl.handle.net/2042/57828
Title: Characterization and Simulation of Deformation-Induced Martensitic Transformations in Medium-Manganese Steels
Author: Callahan, Michael; Schmitt, Jean-Hubert
Abstract: The development of medium-manganese austeno-ferritic steels offers a compromise between the mechanical properties of TRIP (transformation-induced plasticity) and TWIP (twinning-induced plasticity) steels by using the austenite stability to control the active deformation mechanism. Annealing temperatures of 740°C and 780°C provide austenite phases that are respectively stable (no transformation) and metastable (easily transformed) under deformation. This behavioral contrast allows for the isolation of the contribution to work hardening from the TRIP effect, which the current works seeks to quantify via the kinetics of the martensitic transformation. Measurements of the austenite volume fraction as a function of total strain were made via x-ray diffraction and magnetic measurements and were used to develop an iso-work mixture rule to predict the macroscopic behavior of the sample using microstructural information.
Subject: magnetic measurements; TRIP; XRD; martensitic transformation; iso-work
Publisher: AFM, Association Française de Mécanique
Date: 2015

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