In the present study, laser beam welding of commercially pure titanium has been carried out at different scan speeds in the range from 2.4 m/min to 4 m/min at 2.15 kW laser power and its influence on molten pool thermal history, microstructure, residual stress, mechanical and corrosion properties has been studied. Weld thermals cycles were monitored using a single wavelength infrared pyrometer. Effect of laser shock peening on laser welded specimens was also studied. Laser shock peening inducted significant amount of compressive residual stress through plastic deformation. Strain hardening and changes in microstructure such as formation of twining lead to significant improvement in tensile and fatigue properties. Micro-hardness in the fusion zone at sub-surface region got improved by ~26% and fatigue strength increased by ~24%. Corrosion resistance also got increased due to high compressive residual stress and grain refinement after LSP.

在本研究中，已经在2.15 kW的激光功率下以2.4 m / min至4 m / min的不同扫描速度对商业纯钛进行激光束焊接，并且其对熔池热历史，微观结构，残余物有影响。已经研究了应力，机械和腐蚀性能。使用单波长红外高温计监测焊接热循环。还研究了激光冲击喷丸对激光焊接试样的影响。激光冲击喷丸通过塑性变形引起大量的压缩残余应力。应变硬化和微观结构的变化（例如缠绕的形成）导致拉伸和疲劳性能的显着改善。次表面区域熔合区的显微硬度提高了约26％，疲劳强度提高了约24％。