Fatigue performance of additive manufactured metals under variable amplitude service loading conditions including multiaxial stresses and notch effects: Experiments and modelling

摘要: Abstract Additive manufacturing technology has gained significant attention in recent years. However, due to lack of sufficient understanding their fatigue behavior under service loading conditions, design critical load carrying parts using this technique is still at early stages. These conditions include multiaxial stress states, notches and concentrations, variable amplitude cycles. Some the distinguishing features AM metals as compared conventionally fabricated defects, surface roughness, anisotropy build orientation effects, residual stresses fast solidification during fabrication process. factors resulting from processes may significantly affect performance loading. In work, unnotched notched two commonly used with different roughness were studied loads. Both crack initiation approach plane-based model fracture mechanics growth rough or defects notch estimate lives. Fatigue estimations are then experimental results.