Summary of - Characterization of microstructure, mechanical and corrosion response in AISI 304L and Ti-stabilized 439 stainless steels weld joints
Document Type
Article
Abstract
Gas tungsten arc welding (GTAW) was used to join dissimilar materials: 304L austenitic stainless steel (ASS) and Ti-stabilized 439 ferritic stainless steel (FSS). The dissimilar joints were created using a 309L ASS filler electrode with both low and high heat inputs (HIs). The weld zone (WZ) of both weldments contained austenite and ferrite phases in varying volumetric fractions. Ferrite stringers were observed in the unmixed zone on the ASS side, while chromium-rich carbides were found in the heat-affected zone (HAZ) on the FSS side. A higher fraction of carbides was noted in the high HI weldment. The mechanical properties of the low HI weldment were superior to those of the high HI weldment due to the higher ferrite fraction. The electrochemical behavior of both weldments was analyzed using various techniques. The results showed that intergranular corrosion resistance was lower for the low HI-WZ than the high HI-WZ region, but the opposite trend was observed for impedance and pitting resistance.
Publication Date
2023
Recommended Citation
Gupta, Santosh K.; P. Patil, Awanikumar; C. Rathod, Ramesh; Tandon, Vipin; and Gupta, Aman, "Summary of - Characterization of microstructure, mechanical and corrosion response in AISI 304L and Ti-stabilized 439 stainless steels weld joints" (2023). Open Access archive. 9218.
https://impressions.manipal.edu/open-access-archive/9218
