|About this Abstract
||Materials Science & Technology 2011
||MS&T'11 Poster Session
||238 Mechanical Properties in Laser-FSW Hybrid Welded Inconel 718 Alloy
||Kuk Hyun Song, Kazuhiro Nakata
|On-Site Speaker (Planned)
||Kuk Hyun Song
The present study was carried out to evaluate the microstructure and mechanical properties of Inconel 718 alloy subjected to laser-assisted hybrid friction-stir welding (HFSW). In this process, friction-stir welding (FSW) was performed at a constant speed (200 rpm) while a 2-kW YAG laser preheated the material just in front of the rotating tool. We found that HFSW was 1.5 times faster than conventional FSW. The grains in the stir zone observed by transmission electron microscope (TEM) showd significantly refined than that of base material (10 μm), as a result, grain size in the stir zone exhibited 2.1 μm in size. Refined grain size in the stir zone led to 30% and 10% improvements in microhardness and tensile strength, respectively.