Fatigue Analysis of Pore Defects in Ti-6Al-4V Alloy by Selective Laser Melting
Taking Ti-6Al-4V alloy as object,the model for shape,location,size,mutual distance,number and poros-ity of pore defects during additive manufacturing process was established by ABAQUS and FE-SAFE,and effects of pore defects on the fatigue life of SLMed Ti-6Al-4V alloy specimens were investigated.The results indicate that the influence of spherical pores on fatigue life is lower than non-spherical pores.In range of 10～30 μm,influence of spheri-cal internal pore defects on fatigue life is more significant.In range of 40～70 μm,influence of surface pore defects on fatigue life is more obvious than internal pore defects.The rangeability in fatigue life of specimen is increased with increase in radius of spherical pore defect when the porosity is less than 1%.The fatigue life of specimens with mixed pore defects reaches the minimum value with porosity of 1%～5%.The fatigue life fluctuates in a range with different random arrangements.
Selective Laser MeltingTi-6Al-4V AlloyFE-SAFEPore DefectFatigue Life Analysis
万方数据
维普
