Influence of Al on the microstructural evolution and mechanical behavior of low carbon, manganese transformation-induced plasticity steel
SCIE
SCOPUS
- Title
- Influence of Al on the microstructural evolution and mechanical behavior of low carbon, manganese transformation-induced plasticity steel
- Authors
- Suh, DW; Seong-Jun Park; Tae-Ho Lee; Chang-Seok Oh; Kim, SJ
- Date Issued
- 2010-02
- Publisher
- TMS
- Abstract
- Microstructural design with an Al addition is suggested for low-carbon, manganese transformation-induced-plasticity (Mn TRIP) steel for application in the continuous-annealing process. With an Al content of 1 mass pct, the competition between the recrystallization of the cold-rolled microstructure and the austenite formation cannot be avoided during intercritical annealing, and the recrystallization of the deformed matrix does not proceed effectively. The addition of 3 mass pct Al, however, allows nearly complete recrystallization of the deformed microstructure by providing a dual-phase cold-rolled structure consisting of ferrite and martensite and by suppressing excessive austenite formation at a higher annealing temperature. An optimized annealing condition results in the room-temperature stability of the intercritical austenite in Mn TRIP steel containing 3 mass pct Al, permitting persistent transformation to martensite during tensile deformation. The alloy presents an excellent strength-ductility balance combining a tensile strength of approximately 1 GPa with a total elongation over 25 pct, which is comparable to that of Mn TRIP steel subjected to batch-type annealing.
- Keywords
- RETAINED AUSTENITE; HEAT-TREATMENT; MULTIPHASE STEELS; TRIP STEELS; SI; SHEET
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25676
- DOI
- 10.1007/S11661-009-0124-7
- ISSN
- 1073-5623
- Article Type
- Article
- Citation
- METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, vol. 41A, no. 2, page. 397 - 408, 2010-02
- Files in This Item:
-
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.