Microstructural and Mechanical Properties Evaluation of Weld Zone in Super Duplex Stainless Steel for Seawater Proof
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The microstructure and mechanical properties of the heat-affected zone welded using the GTAW process on SDSS material used in offshore structures were analyzed. The chemical composition of the specimen material was analyzed using XRF. The microstructure of the heat-affected zone where the plate was welded was examined by SEM, and the ferrite volume fraction was assessed using the point count method of ASTM E562. A lot of ferrite was formed in the overheated weldment region, and In the weld cap where the cooling rate was fast, ferrite was not converted back to austenite and the microstructure was not uniform. From the ferrite phase fraction, it was shown that it can be applied to the pitting resistance equivalent numbers through changes in mechanical properties according to welding conditions.
Abstract
The microstructure and mechanical properties of the heat-affected zone welded using the GTAW process on SDSS material used in offshore structures were analyzed. The chemical composition of the specimen material was analyzed using XRF. The microstructure of the heat-affected zone where the plate was welded was examined by SEM, and the ferrite volume fraction was assessed using the point count method of ASTM E562. A lot of ferrite was formed in the overheated weldment region, and In the weld cap where the cooling rate was fast, ferrite was not converted back to austenite and the microstructure was not uniform. From the ferrite phase fraction, it was shown that it can be applied to the pitting resistance equivalent numbers through changes in mechanical properties according to welding conditions.
참고문헌 (7)
- Vahid, A H., "Ferrite content measurement in super duplex stainless steel welds", Welding in the World, 63, pp.551~563 (2019)
- Valiente Bermejo, M. A., "Effect of shielding gas on welding performance and properties of duplex and superduplex stainless steel welds", Welding in the World, 59, pp.239~249 (2015)
- Maurya, A. K., "TAW Dissimilar Weldment of SDSS 2507 and Nickel Alloy for Marine Applications: Microstructure–Mechanical Integrity", Metallurgical and Materials Transactions A, pp.1~30 (2023)[DOI]
- George, P., "Machinability, weldability and surface treatment studies of SDSS 2507 material-A review", Materials Today: Proceedings, 46, pp.7682~7687 (2021)
- Shin, B. H., "Effect of cooling rate after heat treatment on pitting corrosion of super duplex stainless steel UNS S 32750", Anti- Corrosion Methods and Materials, 65(5), pp.492~498 (2018)[DOI]
- Shin, B. H., "Precipitation condition and effect of volume fraction on corrosion properties of secondary phase on casted super-duplex stainless steel UNS S32750", Anti-Corrosion Methods and Materials, 66(1), pp.61~66 (2018)
- 손영산, "Al7075를 이용한 GTAW공정의 용가재에 따른 용접 건전성 평가", 한국기계기술학회지, 18(6), pp.961~966 (2016), 한국기계기술학회[DOI]