Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 669, Issue -, Pages 437-446Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.05.104
Keywords
Work-hardening behaviour; Temperature; Mechanical twinning; TWIP steel; Stacking faults; Dynamic strain aging
Categories
Funding
- Australian Research Council [FL0992361]
- Deakin University
- Australian Research Council [FL0992361] Funding Source: Australian Research Council
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In the current study, the work-hardening behaviour of a high manganese TWIP steel was investigated at different deformation temperatures. At room temperature, the steel exhibited an excellent combination of mechanical properties due to a unique work-hardening behaviour. There were four distinct stages observed in the work-hardening behaviour as a result of complex dynamic strain induced micro structural reactions consisted of dynamic recovery, dislocation dissociation, stacking fault formation, mechanical twining and dynamic strain aging. An increase in the deformation temperature significantly influenced the microstructure evolution, resulting in a remarkable alteration in the work-hardening behaviour. Consequently, the mechanical properties of the TWIP steel were gradually deteriorated with the deformation temperature. The mechanical twins appeared to have a restricted influence on the work hardening behaviour of the TWIP steel at room temperature and remarkably diminished with the temperature. The enhanced work-hardening behaviour was mostly attributed to the interaction of glide dislocations with stacking faults. (C) 2016 Elsevier B.V. All rights reserved.
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