Thermomechanical response of a TWIP steel during monotonic and non-monotonic uniaxial loading
SCIE
SCOPUS
- Title
- Thermomechanical response of a TWIP steel during monotonic and non-monotonic uniaxial loading
- Authors
- Majidi, O; DE, COOMAN BRUNO C; Barlat, F; Lee, MG; Korkolis, YP
- Date Issued
- 2016-09-30
- Publisher
- Mat. Sci. Eng. A674
- Abstract
- The tensile properties of a Fe-18%Mn-0.6%C-1.5%Al Twinning-Induced Plasticity (TWIP) steel were investigated at different strain rates in three loading modes, i.e. uniaxial monotonic loading, stress relaxation and loading-unloading-reloading. Infrared thermography was used to investigate the effect of the dynamic strain aging, the strain rate and the temperature on the flow stress. In addition to the standard, i.e., non-isothermal tensile tests, isothermal uniaxial tensile tests were performed at 25 degrees C, 45 degrees C and 65 degrees C. While the non-monotonic loading modes resulted in an increase of the total elongation at a low strain rate of 10(-3) s(-1), no increase was observed for strain rates higher than 6 x 10(-3) s(-1). The temperature gradients observed during non-isothermal tests were reduced when non-monotonic loading conditions were used. Temperature changes were found to influence the hardening behavior, and consequently the ductility, of the TWIP steel. Deformation twinning also had a significant influence on the results as its kinetics in TWIP steel are determined by the temperature dependence of the stacking fault energy. (C) 2016 Elsevier B.V. All rights reserved.
- Keywords
- Elongation; Relaxation; Loading-unloading-reloading; Dynamic strain aging; Thermography
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/37798
- DOI
- 10.1016/J.MSEA.2016.08.002
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- Materials Science and Engineering: A, vol. 674, page. 276 - 285, 2016-09-30
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.