All Issue

2016 Vol.26, Issue 11
Recrystallization Behavior in the Two-Phase (α+γ) Region of Micro-Alloyed Steels

페라이트-오스테나이트 2상역 온도에서 미량합금 원소가 첨가된 탄소강의 재결정 거동

Seung-Yong Lee
,
Ji-Yeon Kim
,
Byoungchul Hwang†
이 승용
,
김 지연
,
황 병철†
Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
서울과학기술대학교 신소재공학과
†Corresponding author : bhwang@seoultech.ac.kr (B. Hwang, Seoul Nat’l Univ. Sci. and Technol.)
November 2016. pp. 583-589
PDF XML Citation
Abstract

In this study, recrystallization behaviors in the two-phase (α+γ) region of micro-alloyed steels such as Base, Nb, TiNbV and CAlN were investigated in terms of flow stress, microstructure and associated grain boundary characteristics. The flow stress of all specimens reached peak stress and gradually decreased, which means that recrystallization or recovery of proeutectoid deformed ferrite and recovery or transformation to ferrite of deformed austenite occurred by thermal activation. The precipitation of carbide or nitride via the addition of micro-alloying elements, because it reduced prior austenite grain size upon austenitization, promoted transformation of austenite to ferrite and increased flow stress. The strain-induced precipitation under deformation in the two-phase region, on the other hand, increased the flow stress when the micro-alloying elements were dissolved during austenitization. The recrystallization of the Nb specimen was more effectively retarded than that of the TiNbV specimen during deformation in the two-phase region.

Keywords
ferrite-austenite
two-phase region
micro-alloyed steel
recrystallization
Nb
References
1
Y Kim, J Kwon, D Jeong, N Woo, M Goto and S Kim, Met. Mater. Int, 20, 851 (2014)
2
L Shi, Z Yan, Y Liu, X Yang, X Qiao, B Ning and H Li, Met. Mater. Int, 20, 19 (2014)
3
M Kang, H Kim, S Lee and SY Sang, Met. Mater. Int, 21, 628 (2015)
4
R Shukla, SK Ghost, D Chakrabarti and S Chatterjee, Met. Mater. Int, 21, 85 (2015)
5
I Tamura, H Sekine and T Tanaka, Thermomechanical processing of high-strength low-alloy steels, Butterworth. Heinemann. (2013)
6
G Glover and CM Sellars, Metall. Trans, 3, 2271 (1972)
7
G Glover and CM Sellars, Metall. Trans, 4, 765 (1973)
8
T Tanaka, N Tabata, T Hatomura and C Chiga, Microalloying 75, Union Carbide Corp. (1977)
9
T Hashimoto, T Sawamura and H Ohtani, Tetsu. To. Hagane, 65, 1425 (1979)
10
H Sekine and T Maruyama, Trans. Iron and Steel Inst. Japan, 16, 427 (1976)
11
DP Dunne, B Feng and T Chandra, ISIJ Int, 31, 1354 (1991)
12
KJ Irvine, FB Pickering and T Gladman, Iron and Steel Inst, 205, 161 (1967)
13
H Ohtska, M Umemoto and I Tamura, Proc. Of THERMEC. 88Tokyo, Japan (1988)
14
MH Thomas and GH Michal, Proc. of Solid-Solid Phase Trasformations, Pittsburgh, USA. TMS-AIME. (1981)
15
L Longfei, Y Wangyue and S Zuqing, Metall. Mater. Trans. A, 37, 609 (2006)
16
A Najafi-Zadeh, JJ Jonas and S Yue, Metall. Trans. A, 23, 2607 (1992)
Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 26
  • No :11
  • Pages :583-589
  • Received Date : 2016-08-29
  • Revised Date : 2016-09-01
  • Accepted Date : 2016-09-02
  • DOI :https://doi.org/10.3740/MRSK.2016.26.11.583
Journal Informaiton Korean Journal of Materials Research Korean Journal of Materials Research
Online Submission
  • scopus
  • NRF
  • KOFST
  • crossref crossmark
  • crossref cited-by
  • crosscheck
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close