Microstructure and Mechanical Properties of Ultra-High Strength Steel Plates with High Deformability
SCIE
SCOPUS
- Title
- Microstructure and Mechanical Properties of Ultra-High Strength Steel Plates with High Deformability
- Authors
- B. Hwang; LEE, Chang Gil; LEE, SUNG HAK
- Date Issued
- 2010-01
- Publisher
- Trans Tech Publications Ltd.
- Abstract
- High deformability has been considered as a critical factor of ultra-high strength steel plates subjected to compressive, tensile, and bending deformation induced by large ground movements. In this paper, various dual phase microstructures consisting of soft ferrite and strong low-temperature transformation phases without deformation in the (austenite + ferrite) two-phase temperature region after controlled rolling were introduced and then the mechanical properties were discussed with emphasis on deformability such as yield ratio and uniform elongation. Ultra-high strength steel plates fabricated by a modified thermo-mechanical control process showed lower yield ratio of under 0.75 and higher uniform elongation of 5% as a minimum, as compared to commercial API X100 and X120 grade pipeline steels, without much sacrifice of Charpy impact properties because of an appropriate formation of soft ferrite and strong low-temperature transformation phases.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/39676
- DOI
- 10.4028/www.scientific.net/MSF.638-642.3266
- ISSN
- 0255-5476
- Article Type
- Article
- Citation
- Materials Science Forum, vol. 638-642, page. 3266 - +, 2010-01
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- There are no files associated with this item.
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