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="tab2"><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">Ionization energy (eV)</td><td class="align_center">Boiling point (°C)</td><td class="align_center">Relative molecular mass</td><td class="align_center">Density (kg/m<sup>3</sup>)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Ar</td><td class="align_center">15.76</td><td class="align_center">−185.9</td><td class="align_center">40</td><td class="align_center">1.38</td></tr><tr><td class="align_left">He</td><td class="align_center">24.56</td><td class="align_center">−268.9</td><td class="align_center">4</td><td class="align_center">0.14</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Basic physical properties of shielding gases.</div>

Advances in Materials Science and Engineering

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Table 2

Table 2: Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire 

Table 2 | Effect of Shielding Gas on Microstructures and Mechanical Properties of TC4 Titanium Alloy Ultranarrow Gap Welded Joint by Laser Welding with Filler Wire 