Martensitic Phase Transformation and Deformation Behavior of Fe–Mn–C–Al Twinning-Induced Plasticity Steel during High-Pressure Torsion

Authors


  • Present address: School of Materials, The University of Manchester, Manchester M13 9PL, United Kingdom
  • Present address: ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom
  • Present address: School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, United Kingdom
  • Present address: Quantum Beam Science Directorate, Japan Atomic Energy Agency, 2–4 Shirakata-Shirane Tokai-mura, Naka-gun, Ibaraki-ken, 319-1195, Japan
  • The authors acknowledge travel funding to the ESRF provided by the International Synchrotron Access Program (ISAP) managed by the Australian Synchrotron. The ISAP is funded by a National Collaborative Research Infrastructure Strategy grant provided by the Federal Government of Australia. We thank beamline staff Dr. Mario Scheel and Dr. Thomas Buslaps and the ESRF User Office. The authors also appreciate Dr. Chang-ho Choi from the DefenceScienceand Technology Organisation, Australia, for providing the materials. This work was supported in part bythe National Science Foundation of the United States under Grant No. DMR-1160966, the European Research Council under ERC Grant Agreement No. 267464-SPDMETALS, and the Australian Research Council.

Abstract

The transformation between the face centered cubic austenitic and hexagonal close-packed martensitic phases during high-pressure torsion processing was observed in a Fe–Mn–C–Al twinning-induced plasticity steel. This phase transformation was not found in the same material processed by unidirectional compressive and tensile deformation. Initiated by the high-pressure loading, the martensite phase initially increased with torsional strain but diminished subsequently. Texture evolution of the austenitic phase was compared with the ideal texture distribution of face-centered cubic materials after shear deformation.

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