|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P2-97: Fiber Laser Welding of Commercially Pure Titanium to Ti-6Al-4V Alloy
||Alireza Abdollahi, Abu Syed Kabir
|On-Site Speaker (Planned)
||Abu Syed Kabir
Dissimilar butt joints of commercially pure Ti (cp-Ti) and Ti-6Al-4V alloy sheets with 3-mm thickness were laser welded using a high-power ytterbium fiber laser welding machine without the use of filler wire. The weldability of these two alloys has been studied by analyzing microstructural transformation, welding defects, hardness, and tensile mechanical properties. Although some welding defects such as underfill and porosity were observed, no solidification cracks were detected. A clear interface in the fusion zone was observed where martensitic transformation was prominent in the Ti-6Al-4V part but no evidence of martensite was observed in the cp-Ti part. The cp-Ti base metal was found to be the weakest in the joints during tensile testing.