122 0

Hot ductility and hot cracking susceptibility of Ti-modified austenitic high Mn steel weld HAZ

Title
Hot ductility and hot cracking susceptibility of Ti-modified austenitic high Mn steel weld HAZ
Author
이창희
Keywords
Alloys; Carbides; Hot working; Solidification; Welding; Recrystallization
Issue Date
2016-12
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS CHEMISTRY AND PHYSICS, v. 184, Page. 118-129
Abstract
The effect of the alloying elements, the carbon, nickel, and the titanium in particular, on the hot ductility behavior of high manganese steel for cryogenic applications was investigated. A hot ductility test was carried out to clarify the mechanism of the heat affected zone (HAZ) liquation and ductility dip cracking that were observed at the HAZ of multi-pass welds. The brittle temperature range, critical strain temperature range, and overall ductility for each alloy were varied due to differences of the eutectic temperatures and the degree of dynamic recrystallization (DRX). The temperature of constitutional liquation between TiC and the austenitic matrix as well as the eutectic temperature of M3C/gamma were determined based on the Ti/C ratio and Ti content in the Fe-Ti-C ternary system. The onset and degree of DRX depended on the grain size, the secondary particle distribution and the chemical composition that determines the stacking fault energy of each alloy. The HAZ cracking was consistent with aspects of liquation cracking including the constitutional liquation between the TiC and austenitic matrix, its reaction temperature, the final M3C/gamma eutectic temperature, extent of liquation, followed by the ductility dip crack that was formed along with resolidified grain boundaries under the DRX temperature. (C) 2016 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0254058416306952https://repository.hanyang.ac.kr/handle/20.500.11754/101500
ISSN
0254-0584; 1879-3312
DOI
10.1016/j.matchemphys.2016.09.032
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

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

BROWSE