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Microstructure and Mechanical Characterization of Friction-Stir-Welded 316L Austenitic Stainless Steels

Microstructure and Mechanical Characterization of Friction-Stir-Welded 316L Austenitic Stainless... Fusion welding of austenitic stainless steels (ASSs) causes undesirable metallographic changes. An attempt has been made to join 3-mm-thick 316L ASS plates using friction stir welding and correlate the microstructural evolution and the mechanical properties under various welding conditions. Tungsten alloy (W-Re) tool was employed for welding. Successful joints were obtained within a range of traverse speeds (45-85 mm/min) used in this work. Various zones were observed across the joint line. The stir zone exhibited considerable grain refinement and traces of delta ferrite phase. EBSD images showed a decreasing grain size with increased traverse speed. XRD patterns and TEM images confirmed the existence of delta ferrite. The mechanical properties of the joints including microhardness, tensile strength, impact toughness and bending were further reported. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Engineering and Performance Springer Journals

Microstructure and Mechanical Characterization of Friction-Stir-Welded 316L Austenitic Stainless Steels

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References (51)

Publisher
Springer Journals
Copyright
Copyright © 2018 by ASM International
Subject
Materials Science; Characterization and Evaluation of Materials; Tribology, Corrosion and Coatings; Quality Control, Reliability, Safety and Risk; Engineering Design
ISSN
1059-9495
eISSN
1544-1024
DOI
10.1007/s11665-018-3802-z
Publisher site
See Article on Publisher Site

Abstract

Fusion welding of austenitic stainless steels (ASSs) causes undesirable metallographic changes. An attempt has been made to join 3-mm-thick 316L ASS plates using friction stir welding and correlate the microstructural evolution and the mechanical properties under various welding conditions. Tungsten alloy (W-Re) tool was employed for welding. Successful joints were obtained within a range of traverse speeds (45-85 mm/min) used in this work. Various zones were observed across the joint line. The stir zone exhibited considerable grain refinement and traces of delta ferrite phase. EBSD images showed a decreasing grain size with increased traverse speed. XRD patterns and TEM images confirmed the existence of delta ferrite. The mechanical properties of the joints including microhardness, tensile strength, impact toughness and bending were further reported.

Journal

Journal of Materials Engineering and PerformanceSpringer Journals

Published: Dec 17, 2018

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