Numerical Investigation of the Influence of Fatigue Testing Frequency on the Fracture and Crack Propagation Rate of Additive-Manufactured AlSi10Mg and Ti-6Al-4V Alloys

Advances in machine systems and scanning technologies have increased the use of selective laser melted materials industrial applications, resulting almost full-density products. Inconsistent mechanical behavior components under cyclic stress is caused by microstructure porosity created during powder melting. The extended finite element method, XFEM, was used to imitate crack propagation utilizing an arbitrary fracture route study fatigue growth additively produced specimens. influence loading level testing frequency on life studied using energy rate curves. Micro-computed tomography (µ-CT) scans offer 2D images angular increments. There are several ways reduce number faces vertices. Opensource software isolate cylindrical shell from interior pores create models µ-CT projections. All simulations were supposedly specimens made melting (SLM) based previous experimental results authors. Crack curves utilized evaluate effects frequency. At larger loads, area increases abruptly at 3E3 cycles, then stabilizes 4E4 cycles Al alloys comparison Ti-6Al-4V alloys. may be determine Paris constants applied stresses.