Microstructural Developments and Tensile Properties of Lean Fe-Mn-Al-C Lightweight Steels
SCIE
SCOPUS
- Title
- Microstructural Developments and Tensile Properties of Lean Fe-Mn-Al-C Lightweight Steels
- Authors
- Sohn, SS; Lee, S; LEE, BYEONG JOO; Kwak, JH
- Date Issued
- 2014-09
- Publisher
- SPRINGER
- Abstract
- Concepts of Fe-Al-Mn-C-based lightweight steels are fairly simple, but primary metallurgical issues are complicated. In this study, recent studies on lean-composition lightweight steels were reviewed, summarized, and emphasized by their microstructural development and mechanical properties. The lightweight steels containing a low-density element of Al were designed by thermodynamic calculation and were manufactured by conventional industrial processes. Their microstructures consisted of various secondary phases as kappa-carbide, martensite, and austenite in the ferrite matrix according to manufacturing and annealing procedures. The solidification microstructure containing segregations of C, Mn, and Al produced a banded structure during the hot rolling. The (ferrite + austenite) duplex microstructure was formed after the annealing, and the austenite was retained at room temperature. It was because the thermal stability of austenite nucleated from fine kappa-carbide was quite high due to fine grain size of austenite. Because these lightweight steels have outstanding properties of strength and ductility as well as reduced density, they give a promise for automotive applications requiring excellent properties.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13644
- DOI
- 10.1007/S11837-014-1128-3
- ISSN
- 1047-4838
- Article Type
- Article
- Citation
- JOM, vol. 66, no. 9, page. 1857 - 1867, 2014-09
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- There are no files associated with this item.
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