Microstructural characteristics and mechanical properties in laser beam welds of Ti6Al4V alloy

The microstructural characteristics and mechanical properties in laser beam welds of Ti6Al4V alloy were investigated. The microstructural characteristics in the heat affected zone and fusion zone change obviously after laser beam welding, which are strongly influenced by the welding conditions. The mechanical properties of the welds are evidently dependent on the microstructural characteristics, and the strengthening in the heat affected zone and fusion zone is mainly attributed to the formation of martensite.