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

Journal Article · Tue Jan 15 04:00:00 EST 2019 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3802-Z· OSTI ID:22971018

Dinaharan, I. ^[1]; Kumar, Ravi ^[2]; Akinlabi, E. T. ^[1]

---

1. University of Johannesburg, Department of Mechanical Engineering Science (South Africa)
2. Indian Institute of Technology Madras, Department of Metallurgical and Materials Engineering (India)

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.

• OSTI ID: 22971018
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 1 Vol. 28; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
AUSTENITIC STEELS
ELECTRON DIFFRACTION
FERRITE
FRICTION WELDING
GRAIN REFINEMENT
GRAIN SIZE
IMPACT STRENGTH
MICROHARDNESS
TENSILE PROPERTIES
TUNGSTEN ALLOYS
X-RAY DIFFRACTION