Browse > Article

Effects of Microstructure on Ductility of Medium Carbon Spring Steels  

Lee, Hyun-Kwuon (School of Advanced Materials & System Engineering, Kumoh National Institute of Technology)
Lee, Sang-Woo (School of Advanced Materials & System Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Society for Heat Treatment / v.22, no.2, 2009 , pp. 80-87 More about this Journal
Abstract
Effects of retained austenite contents on ductility of medium carbon spring steels according to steel alloy compositions and heat treatment conditions were studied. Contents of retained austenite varied with steel compositions and heat treatment conditions, and some retained austenite were found to transform to martensite on stress. Reduction of area (RA) increased with contents of retained austenite, then saturated through its maximum, and subsequently decreased. Increase in RA with retained austenite contents could be due to crack blunting effect by retained austenite on stress, however, more contents of martensite transformed from retained austenite in its higher contents could cause decrease in RA.
Keywords
Carbon steel; Composition; Heat treatments; Retained austenite; Ductility; Martensite transformation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 J. I. Kim and J. W. Morris : Jr.,Metall. Trans., llA (1980) 1401
2 C. K. Syn, B. Fultz, and J. W. Morris : Jr., Metall. Trans.. 9A (1978) 1635
3 C. A. Parmpillo and H.W. Paxton : Metall. Trans., 3 (1972) 2895   DOI
4 H. Haga : Trans. ISIJ, 13 (1973) 141
5 H. Yarita : 스프링論文集 第43號 (1998) 1
6 H. J. Rack and D. Kalish : Metall. Trans., 2 (1971) 3011   DOI
7 D. Frear and J. W. Morris : Jr, Metall. Trans., 17A (1986) 243