Effect of Plate Thickness on Tensile Properties of Laser Beam Welded Ti6Al4V Alloy
The IUP Journal of Mechanical Engineering, Vol. 3, No. 1, pp. 58-67, February 2010
Posted: 10 Mar 2010
Date Written: March 9, 2010
Abstract
In this investigation, square butt joints were fabricated autogenously using the Laser Beam Welding (LBW) technique, from 1.6 and 3 mm thick plates of Ti6Al4V alloy. Since the Ti6Al4V alloy has high reflectivity, the LBW technique is difficult. Therefore, a high intensity laser beam is required to compensate for the energy losses caused by the scattering of the laser beam. The LBW weldments were fabricated with powers of 2.4 and 3.5 kW for the 1.6 and 3 mm thick plates. Both the 1.6 and 3 mm plates showed smaller Heat Affected Zones (HAZ). The 3 mm plate was immune to thermal cracking and showed better tensile strength.
Keywords: Ti6Al4V, Laser Beam Welding (LBW), Plate thickness, Weldment
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