TY - JOUR
T1 - Evaluation of fatigue crack propagation behavior of pressurized sintered Ag nanoparticles and its application to thermal fatigue life prediction of sintered joint
AU - Sato, Takahiko
AU - Kariya, Yoshiharu
AU - Takahashi, Hiroki
AU - Nakamura, Taishi
AU - Aiko, Yuki
N1 - Funding Information:
This research was conducted with the support of the Grants-in-Aid of New Energy and Industrial Technology Development Organization (NEDO).
Publisher Copyright:
©2019 The Japan Institute of Metals and Materials
PY - 2019
Y1 - 2019
N2 - Fatigue crack propagation rate of pressure-sintered Ag nanoparticles was investigated and prediction method of fatigue crack propagation using strain energy density computed by FEM was proposed. The fatigue crack propagation rate was lower than that of pressureless-sintered Ag nanoparticles around ambient temperature. At high temperature, multiple small cracks occurred ahead of a main crack and they were connected with one another and the propagation rate of the main crack increased, so that properties of fatigue crack propagation in the high temperature region were close to those of pressureless-sintered Ag nanoparticles. As the inelastic strain energy density and the length of its acquisition area were inversely proportional, the prediction of fatigue crack propagation that do not depend on the size of the area was possible by the use of the proportional constant of the relationship. The behavior of thermal fatigue crack propagation of sintered joint structure that was predicted by the derived fatigue crack propagation law was mostly in agreement with experimental behavior.
AB - Fatigue crack propagation rate of pressure-sintered Ag nanoparticles was investigated and prediction method of fatigue crack propagation using strain energy density computed by FEM was proposed. The fatigue crack propagation rate was lower than that of pressureless-sintered Ag nanoparticles around ambient temperature. At high temperature, multiple small cracks occurred ahead of a main crack and they were connected with one another and the propagation rate of the main crack increased, so that properties of fatigue crack propagation in the high temperature region were close to those of pressureless-sintered Ag nanoparticles. As the inelastic strain energy density and the length of its acquisition area were inversely proportional, the prediction of fatigue crack propagation that do not depend on the size of the area was possible by the use of the proportional constant of the relationship. The behavior of thermal fatigue crack propagation of sintered joint structure that was predicted by the derived fatigue crack propagation law was mostly in agreement with experimental behavior.
KW - Fatigue
KW - Fatigue crack propagation
KW - Inelastic strain energy density
KW - Pressurized sintering
KW - Silver nanoparticles
KW - Thermal cycle
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U2 - 10.2320/matertrans.MH201802
DO - 10.2320/matertrans.MH201802
M3 - Article
AN - SCOPUS:85066274422
SN - 1345-9678
VL - 60
SP - 850
EP - 857
JO - Materials Transactions
JF - Materials Transactions
IS - 6
ER -