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

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Type of shielding gas</td><td class="align_center">Tensile strength Rm (MPa)</td><td class="align_center">Yield strength Rm (MPa)</td><td class="align_center">Elongation A (%)</td><td class="align_center">Fracture location</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Base metal</td><td class="align_center">922</td><td class="align_center">831</td><td class="align_center">12.5</td><td class="align_center">—</td></tr><tr><td class="align_left">Ar</td><td class="align_center">925</td><td class="align_center">—</td><td class="align_center">11.5</td><td class="align_center" rowspan="2">Fusion zone</td></tr><tr><td class="align_left">He</td><td class="align_center">931</td><td class="align_center">—</td><td class="align_center">12.3</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Advances in Materials Science and Engineering

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Table 4

Table 4: Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire 

Table 4 | Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire 