Journal
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
Volume 21, Issue 5, Pages 381-388Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/13621718.2015.1122152
Keywords
Carbon steel; Austenitic stainless steel; Dissimilar welding; Microstructure; Mechanical properties; Corrosion mechanism
Funding
- Key Laboratory of Ministry of Education of Oil Gas Equipment [OGE201402-02]
- Sichuan Provincial Education Department [15ZA0057]
Ask authors/readers for more resources
In this study, the joints of dissimilar materials between S355JR carbon steel and 316L stainless steel were welded by gas tungsten arc welding (GTAW) multi-pass welding process. Characterisations of microstructure, mechanical properties and corrosion behaviours of dissimilar joint were investigated. The experimental results reveal that the microstructure of weld metal (WM) is austenite and vermiform delta-ferrite, and they cross-distribute in the weld seam. Moreover, there is a decarburisation layer on the interface of S355JR/WM, but the detrimental phase sigma and M23C6 (chromium carbide) are not observed in the WM through X-ray diffraction. The fracture of the S355JR/316L welded joints always occurs in the S355JR heat affected zone during tensile test. Mechanical properties of the welded joints prepared by GTAW can meet the requirements of engineering application. The electrochemical corrosion test is also indicates that the corrosion resistance of WM decreases compared with the 316L base material. The corrosion products of S355JR/316L dissimilar welded joints in 3.5 wt-% NaCl aqueous solution mainly are alpha-Fe and FeOOH.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available