Open Access System for Information Sharing

Login Library

 

Article
Cited 100 time in webofscience Cited 122 time in scopus
Metadata Downloads

Effects of volume fraction and stability of retained austenite on formability in a 0.1C-1.5Si-1.5Mn-0.5Cu TRIP-aided cold-rolled steel sheet SCIE SCOPUS

Title
Effects of volume fraction and stability of retained austenite on formability in a 0.1C-1.5Si-1.5Mn-0.5Cu TRIP-aided cold-rolled steel sheet
Authors
Lee, CGKim, SJLee, THLee, SH
Date Issued
2004-04-25
Publisher
ELSEVIER SCIENCE SA
Abstract
The effects of volume fraction and stability of retained austenite on formability of a 0.1C-1.5Si-1.5Mn-0.5Cu (hereafter all in wt.%) TRIP-aided cold-rolled steel sheet was investigated after various heat treatments (intercritical annealing and isothermal treatment). Tensile tests and limiting dome height (LDH) tests were conducted on the heat-treated sheet specimens, and the changes of retained austenite volume fraction as a function of tensile strain were measured using an X-ray diffractometer. The results showed a plausible relationship between formability and retained austenite parameters such as stability and initial volume fraction. The formability was improved with increasing volume fraction of retained austenite. However, when the volume fraction of retained austenite was same, the better formability was obtained in the specimens with the higher stability of retained austenite. This indicated that the strain-induced transformation of retained austenite to martensite could be stably progressed, thereby leading to the improvement of formability. Thus, the heat-treatment conditions should be established in consideration of the maximum volume fraction and high stability of retained austenite, and the optimal conditions were found to be intercritical annealing in the temperature range at which the austenite volume fraction was about 50%, followed by isothermal treatment at M, temperature. (C) 2003 Elsevier B.V. All rights reserved.
Keywords
TRIP steel; retained austenite; stability; formability; limiting dome height (LDH); flow limiting curve (FLQ); TRANSFORMATION; DUCTILITY; METAL
URI
https://oasis.postech.ac.kr/handle/2014.oak/17949
DOI
10.1016/S0921-5093(03)00035-2
ISSN
0921-5093
Article Type
Article
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 371, no. 1-2, page. 16 - 23, 2004-04-25
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher

이성학LEE, SUNG HAK
Dept of Materials Science & Enginrg
Read more

Views & Downloads

Browse