Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire

Table 1

Chemical compositions of base metal and filler metal.

Material	Al	V	Fe	C	N	H	O	Ti
TC4	6.30	4.11	0.018	0.024	0.007	0.001	0.14	Balance
TC3	4.75	3.82	0.044	0.012	0.006	0.001	0.081	Balance