Partially-recrystallized, Nb-alloyed TWIP steels with a superior strength-ductility balance
- Authors
- Gwon, Hojun; Kim, Jin-Kyung; Jian, Bian; Mohrbacher, Hardy; Song, Taejin; Kim, Sung-Kyu; De Cooman, Bruno C.
- Issue Date
- Jan-2018
- Publisher
- Elsevier BV
- Keywords
- Nb micro-alloying; TWIP steel; Mechanical properties; Recovery annealing
- Citation
- Materials Science and Engineering: A, v.711, pp.130 - 139
- Indexed
- SCIE
SCOPUS
- Journal Title
- Materials Science and Engineering: A
- Volume
- 711
- Start Page
- 130
- End Page
- 139
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/6888
- DOI
- 10.1016/j.msea.2017.11.012
- ISSN
- 0921-5093
- Abstract
- We investigated the effect of Nb micro-alloying in the range of 0.01 to 0.1 wt% on the microstructures and mechanical properties of Fe17Mn0.6Cl.5Al (wt%) TWIP steel. EBSD analysis shows that the Nb addition retards recrystallization in both the hot-rolled steels and cold-rolled and annealed steels. The Nb addition in the cold rolled and annealed TWIP steel leads to an increase in yield strength. This phenomenon is due to a combined effect of precipitation hardening and a low degree of recrystallization. Recovery annealing of the cold-rolled TWIP steels at 650 degrees C results in a good combination of yield strength and ductility. The steels containing 0.01 wt % and 0.025 wt% of Nb show a superior combination of UTS x TE exceeding 40,000 MPa.% and yield strength higher than 800 MPa. The design of TWIP steels utilizing both precipitation hardening and partial re crystallization opens a way to develop steels with a superior combination of yield strength and ductility.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.