Achievement of high yield strength and strain hardening rate by forming fine ferrite and dislocation substructures in duplex lightweight steel
- Authors
- 손석수
- Issue Date
- 9월-2017
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Dislocation substructures; Lightweight steels; Strain hardening
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.704, pp.287 - 291
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
- Volume
- 704
- Start Page
- 287
- End Page
- 291
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/139814
- DOI
- 10.1016/j.msea.2017.08.030
- ISSN
- 0921-5093
- Abstract
- Lightweight steels containing a considerable content of Al show high specific strength and ductility, but there are some drawbacks such as low yield strength and stringer-type bands formed along the rolling direction. Here we design new duplex lightweight steel in order to complement the drawbacks, and achieve ultra-high yield strength (865 MPa), good ductility (41%). Submicron ferrite mainly affects high yield-to-tensile ratio, and high strain hardening is attributed to Lomer-Cottrell lock and planar slip, and cell structure by further deformation in austenite. These results are expected to provide a desirable possibility for applications to reinforcement components requiring high yield-to-tensile ratio.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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