Evaluation of fatigue crack propagation of Sn5.0Sb/Cu joint using inelastic strain energy density

Yuta Nakajima, Keisuke Ono, Yoshiharu Kariya

研究成果: Article

抄録

In this study, evaluation of fatigue crack properties in the Sn5.0Sb/Cu joint was performed by using the inelastic strain energy density Win around the crack tip which was calculated by FEM. Win-c given by the multiplication of Win obtained from an arbitrary-sized square region surrounding the crack tip by the side length of the square region did not depend on the size of the square region and the element size. The fatigue crack propagated in the solder layer and the power law of Paris law type between its fatigue crack propagation rate and ¦Win-c held. However, the power exponent in the fatigue crack propagation law differed depending on the regions of ¦Win-c. The power exponent became about 1 in the low ¦Win-c region and very large in the high ¦Win-c region. In the low ¦Win-c region, fatigue fracture propagated along the high angle grain boundaries formed ahead of the crack by the continuous dynamic recrystallization. On the other hand, the fracture transformed to static fracture mode in the high ¦Win-c region and the cleavage fracture was observed. The large power exponent in the high ¦Win-c region was attributed to the cleavage fracture.

元の言語English
ページ(範囲)876-881
ページ数6
ジャーナルMaterials Transactions
60
発行部数6
DOI
出版物ステータスPublished - 2019 1 1

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crack propagation
Strain energy
Fatigue crack propagation
flux density
evaluation
cracks
crack tips
exponents
Crack tips
cleavage
Dynamic recrystallization
solders
multiplication
Soldering alloys
Grain boundaries
grain boundaries
Fatigue of materials
Cracks
Finite element method
Fatigue cracks

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Evaluation of fatigue crack propagation of Sn5.0Sb/Cu joint using inelastic strain energy density. / Nakajima, Yuta; Ono, Keisuke; Kariya, Yoshiharu.

:: Materials Transactions, 巻 60, 番号 6, 01.01.2019, p. 876-881.

研究成果: Article

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