IN-SITU OBSERVATION OF HIGH-TEMPERATURE FRACTURE BEHAVIOUR OF 347 STAINLESS STEEL SUBJECTED TO SIMULATED WELDING PROCESS
- Authors
- Ko, Seok-Woo; Park, Hyeonwoo; Yoo, Il; Kim, Hansoo; Lee, Joonho; Hwang, Byoungchul
- Issue Date
- 2021
- Publisher
- POLSKA AKAD NAUK, POLISH ACAD SCIENCES, INST METALL & MATER SCI PAS
- Keywords
- 347 stainless steel; in-situ; high temperature; fracture behaviour; welding; confocal laser scanning microscope (CLSM)
- Citation
- ARCHIVES OF METALLURGY AND MATERIALS, v.66, no.4, pp.1019 - 1022
- Indexed
- SCIE
SCOPUS
- Journal Title
- ARCHIVES OF METALLURGY AND MATERIALS
- Volume
- 66
- Number
- 4
- Start Page
- 1019
- End Page
- 1022
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/138481
- DOI
- 10.24425/amm.2021.136417
- ISSN
- 1733-3490
- Abstract
- In-situ study on the high-temperature fracture behaviour of 347 stainless steel was carried out by using a confocal laser scanning microscope (CLSM). The welding microstructures of the 347 stainless steel were simulated by subjecting the steel specimen to solu-tion and aging treatments. Undissolved NbC carbides were present within grains after solution treatment, and M23C6 carbides were preferentially formed at grain boundaries after subsequent aging treatment. The M23C6 carbides formed at grain boundaries worked as stress concentration sites and thus generated larger cracks during high-temperature tensile testing. In addition, grain boundary embrittlement was found to be a dominant mechanism for the high-temperature fracture of the 347 stainless steel because vacancy diffusion in the Cr-depleted zones enhances fracture due to the precipitation of M23C6 carbides at boundaries.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.