TY - GEN
T1 - The effect of lack-of-fusion porosity on fatigue behavior of additive manufactured titanium alloy
AU - Wan, Hualiang
AU - Wang, Qizhi
AU - Lin, Huixing
N1 - Publisher Copyright:
© 2017 Trans Tech Publications, Switzerland.
PY - 2017
Y1 - 2017
N2 - As we know, the fatigue performance of AM materials is highly associated with the microstructure. The fatigue performance of additive manufacture alloy materials of Ti-6Al-4V is investigated in this study. Considering the hysteresis energy, a damage evolution equation has been advanced. The material parameters in damage evolution equation are obtained with fatigue experimental data. A homogenizing model with reflecting microstructures is established. Two types of defects, gas porosity and lack-of-fusion porosity, are discussed. The mean fatigue crack initiation lives of additive manufactured Ti6Al4V with different orientations are predicted by the present method. The computational results are agreement well with the experimental data. The effect of lack-of-fusion porosity density on the fatigue performance of AM materials is studied. The fatigue lives of AM materials with different lack-of-fusion porosity size are evaluated. This present method represents the effect of the microdefect on the fatigue performance, with the effect of anisotropic damage and strain.
AB - As we know, the fatigue performance of AM materials is highly associated with the microstructure. The fatigue performance of additive manufacture alloy materials of Ti-6Al-4V is investigated in this study. Considering the hysteresis energy, a damage evolution equation has been advanced. The material parameters in damage evolution equation are obtained with fatigue experimental data. A homogenizing model with reflecting microstructures is established. Two types of defects, gas porosity and lack-of-fusion porosity, are discussed. The mean fatigue crack initiation lives of additive manufactured Ti6Al4V with different orientations are predicted by the present method. The computational results are agreement well with the experimental data. The effect of lack-of-fusion porosity density on the fatigue performance of AM materials is studied. The fatigue lives of AM materials with different lack-of-fusion porosity size are evaluated. This present method represents the effect of the microdefect on the fatigue performance, with the effect of anisotropic damage and strain.
KW - Additive manufacture
KW - Damage mechanics-finite element method
KW - Fatigue life
KW - Lack-of-fusion porosity
UR - https://www.scopus.com/pages/publications/85009105042
U2 - 10.4028/www.scientific.net/KEM.723.44
DO - 10.4028/www.scientific.net/KEM.723.44
M3 - 会议稿件
AN - SCOPUS:85009105042
SN - 9783038357667
T3 - Key Engineering Materials
SP - 44
EP - 50
BT - Proceedings of International Conference on Material Science and Engineering 2016
A2 - Eldessouki, Mohamed F.
A2 - Kim, Sung Whan
A2 - Wei, Sheng Li
PB - Trans Tech Publications Ltd
T2 - International Conference on Material Science and Engineering, ICMSE 2016
Y2 - 24 June 2016 through 26 June 2016
ER -