Thermal effects on the enhanced ductility in non-monotonic uniaxial tension of DP780 steel sheet
- Authors
- Majidi, Omid; Barlat, Frederic; Korkolis, Yannis P.; Fu, Jiawei; Lee, Myoung-Gyu
- Issue Date
- 11월-2016
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- metals; ductility; tensile test; stress relaxation; loading-unloading-reloading
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.22, no.6, pp.968 - 973
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- METALS AND MATERIALS INTERNATIONAL
- Volume
- 22
- Number
- 6
- Start Page
- 968
- End Page
- 973
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/86929
- DOI
- 10.1007/s12540-016-6210-7
- ISSN
- 1598-9623
- Abstract
- To understand the material behavior during non-monotonic loading, uniaxial tension tests were conducted in three modes, namely, the monotonic loading, loading with periodic relaxation and periodic loading-unloadingreloading, at different strain rates (0.001/s to 0.01/s). In this study, the temperature gradient developing during each test and its contribution to increasing the apparent ductility of DP780 steel sheets were considered. In order to assess the influence of temperature, isothermal uniaxial tension tests were also performed at three temperatures (298 K, 313 K and 328 K (25 A degrees C, 40 A degrees C and 55 A degrees C)). A digital image correlation system coupled with an infrared thermography was used in the experiments. The results show that the non-monotonic loading modes increased the apparent ductility of the specimens. It was observed that compared with the monotonic loading, the temperature gradient became more uniform when a non-monotonic loading was applied.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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