What is it about?
This paper deals with Cr–Mn austenitic stainless steel welding. Different welding speeds were used. The SMAW and GMAW welding processes were compared regarding microstructure, mechanical, and corrosion properties. ER 308L and ER 308L-16 are used as fillers.
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Why is it important?
The microstructural study of both welding techniques reveals δ-ferrite dendrites in the weldment. With an increase in welding speed, the δ -ferrite composition of the weld zone increases. More δ-ferrite is found in the weldment of SMAW weld then in GMAW weld. HAZ width reduces with an increase in welding speed.
Perspectives
The DLEPR tests disclose that SMAW and GMAW welds are disposed to Intergranular corrosion (IGC). Weld joints of ultra-low nickel Cr–Mn austenitic stainless steel made with GMAW are more disposed to IGC. The degree of sensitization decreases with an increase in welding speed. However, both SMAW and GMAW welds are more disposed to Intergranular corrosion IGC as related to the base metal.
Professor Milos B. Djukic
University of Belgrade, Faculty of Mechanical Engineering
Read the Original
This page is a summary of: Microstructure, mechanical properties and sensitization of ultra-low nickel Cr-Mn Austenitic stainless steels, Journal of Materials Research and Technology, April 2024, Elsevier,
DOI: 10.1016/j.jmrt.2024.04.127.
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