T.S.Balasubramanian and V.Balasubramanian and M.A.Muthumanikkam
Effect of Welding Processes on Fatigue Properties of Ti6Al4V Alloy Joints
427 - 436
2011
5
2
International Journal of Mechanical and Mechatronics Engineering
https://publications.waset.org/pdf/5659
https://publications.waset.org/vol/50
World Academy of Science, Engineering and Technology
This paper reports the fatigue crack growth behaviour
of gas tungsten arc, electron beam and laser beam welded Ti6Al4V
titanium alloy. Centre cracked tensile specimens were prepared to
evaluate the fatigue crack growth behaviour. A 100kN servo
hydraulic controlled fatigue testing machine was used under constant
amplitude uniaxial tensile load (stress ratio of 0.1 and frequency of
10 Hz). Crack growth curves were plotted and crack growth
parameters (exponent and intercept) were evaluated. Critical and
threshold stress intensity factor ranges were also evaluated. Fatigue
crack growth behaviour of welds was correlated with mechanical
properties and microstructural characteristics of welds. Of the three
joints, the joint fabricated by laser beam welding exhibited higher
fatigue crack growth resistance due to the presence of fine lamellar
microstructure in the weld metal.
Open Science Index 50, 2011