A STUDY ON NDE METHOD OF THERMAL AGING OF CAST DUPLEX STAINLESS-STEELS

Citation
T. Goto et al., A STUDY ON NDE METHOD OF THERMAL AGING OF CAST DUPLEX STAINLESS-STEELS, Nuclear Engineering and Design, 182(2), 1998, pp. 181-192
Citations number
6
Categorie Soggetti
Nuclear Sciences & Tecnology
ISSN journal
00295493
Volume
182
Issue
2
Year of publication
1998
Pages
181 - 192
Database
ISI
SICI code
0029-5493(1998)182:2<181:ASONMO>2.0.ZU;2-4
Abstract
To maintain the integrity of applications of the duplex stainless stee ls currently in service, a study was conducted to develop a method to nondestructively estimate their Charpy-impact energy at room temperatu re. It was found that hardness of the ferrite phase is a reliable indi cator of the process of embrittlement during long-term heating of dupl ex stainless steels. However, further information on the ferrite phase and the austenite phase is required for the estimation of Charpy-impa ct energy. An equation composed of the hardness values of ferrite and austenite phases, the ferrite content and the average spacing of ferri te phase islands was presented as a method applicable to the nondestru ctive estimation of Charpy-impact energy at room temperature. (C) 1998 Elsevier Science S.A. All rights reserved.