Microstructural Characterization and Mechanical Properties of Stainless Steel Inlay Welded Dissimilar Materials

Jun Hyong Kim; Auezhan Amanov; Myeong Sung Kang; Hak Doo Kim; Young Sik Pyun; Yoon Suk Choi

doi:10.4028/www.scientific.net/MSF.879.932

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HomeMaterials Science ForumMaterials Science Forum Vol. 879Microstructural Characterization and Mechanical...

Microstructural Characterization and Mechanical Properties of Stainless Steel Inlay Welded Dissimilar Materials

Abstract:

This present work was carried out to characterize the microstructure and mechanical properties of austenitic stainless steel (SS) 316L to dissimilar welding of Inconel 52 and Inconel 82 fillers that were treated by ultrasonic nanocrystalline surface modification (UNSM) technique. The microstructure and hardness map of the specimens were characterized by optical microscope (OM) and micro-hardness tester. The increase in hardness and refinement in grain size after UNSM treatment were found for the SS 316L/52 and SS 316L/82. In addition, the induced compressive residual stress in the surface layer of base SS 316L was measured. It is expected that the increased hardness into several microns in depth and modified microstructure with a severe plastically deformed surface layer by UNSM technique can increase the resistance to corrosion and extend the service life of pressurized water reactors (PWRs).

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Periodical:

Materials Science Forum (Volume 879)

Pages:

932-937

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.932

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Online since:

November 2016

Authors:

Jun Hyong Kim, Auezhan Amanov, Myeong Sung Kang, Hak Doo Kim, Young Sik Pyun*, Yoon Suk Choi

Keywords:

Hardness, Ss 316L, Surface Modification, Welded Dissimilar Material

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