Journal
SCRIPTA MATERIALIA
Volume 150, Issue -, Pages 168-172Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.03.017
Keywords
TWIP; Grain orientation dependence; Stacking fault probability; Tension-compression asymmetry; Detwinning
Categories
Funding
- Natural Science Foundation of China [51571025]
- Laboratory Directed Research and Development (LDRD) Program of Oak Ridge National Laboratory
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The tension-compression type of load reversal produces an asymmetric cyclic tension-compression behavior and varied yielding stresses in the subsequent monotonic tension and compression in a twinning induced plasticity steel. The micromechanical behavior was elucidated via the evolutions of the stacking fault probability and the grain orientation density captured by in-situ neutron diffraction. The latter indicates more profound detwinning activities in a reversal from tension to compression than those from compression to tension and more twinning involves in monotonic tension than in compression. This is confirmed by the calculated twinning activities in monotonic tension and compression using the visco-plastic self-consistent model. (C) 2018 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.
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