| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 831381 | Materials & Design (1980-2015) | 2011 | 12 Pages |
The present investigation is aimed to evaluate fatigue crack growth parameters of gas tungsten arc, electron beam and laser beam welded Ti–6Al–4V titanium alloy for assessing the remaining service lives of existing structure by fracture mechanics approach. Center cracked tensile specimens were tested using a 100 kN servo hydraulic controlled fatigue testing machine under constant amplitude uniaxial tensile load. Crack growth curves were plotted and crack growth parameters (exponent and intercept) were evaluated. Fatigue crack growth behavior 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.
► The available data focus on stress ratio, microstructure and residual stress on crack growth. ► No literature available on fatigue behaviour of GTAW, LBW and EBW joints of Ti–Al–4V alloys. ► This study compares the fatigue crack growth rate of GTAW, LBW and EBW joints of Ti–6Al–4V alloy.
