Microstructural Evolution during Friction Stir Welding of Austenitic Stainless Steel AISI 316 to Low Carbon Steel St 37

مهندسی متالورژی و مواد

Article 3, Volume 27, Issue 2 - Serial Number 14, August 2016, Pages 35-46   

Document Type: Original Articles

DOI: 10.22067/ma.v27i2.29835

Authors

Amirhossein khosrovaninezhad^* ; morteza shamanian; ahmad rezaeian; masoud atapour

Isfahan University of Technology

Abstract

The microstructural evolution of dissimilar joining of austenitic stainless steel AISI 316 and low carbon steel St37 by friction stir welding has been investigated. Friction stir welding was carried out using a rotational speed of 600 rpm and a linear speed of 50 mm/min. The microstructure was characterized using a scanning electron microscope and optical microscopy. Also, possible phase transformations were determined using X-ray diffraction technique & electron diffraction spectroscopy. The results of phase investigations showed that no carbides and brittle phases were detected at the joined boundary. Microstructural investigations showed that the highest decrease in grain size occurred in the stir zone of the austenitic stainless steel which was attributed to discontinuous dynamic recrystallization caused by severe deformation imposed at high temperatures in this region.

Keywords

Friction Stir Welding; Dissimilar joint; Austenitic stainless steel; Low Carbon Steel

Supplementary Files

4- khosravani extended.pdf

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