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.
关键词
激光选区熔化/Ti-6Al-4V合金/FE-SAFE/孔隙缺陷/疲劳寿命分析
Key words
Selective Laser Melting/Ti-6Al-4V Alloy/FE-SAFE/Pore Defect/Fatigue Life Analysis
维普
万方数据