Crystal plasticity finite element study of deformation behavior in commonly observed microstructures in lead free solder joints

Payam Darbandi, Tae Kyu Lee, Thomas R. Bieler, Farhang Pourboghrat

Research output: Contribution to journalArticle

  • 11 Citations

Abstract

The anisotropy of the tin phase in a Pb-free tin based solder joint has a significant effect on heterogeneous deformation and therefore, the reliability of solder joints. In this study the ability of crystal plasticity finite element (CPFE) modeling to account for elastic and plastic anisotropy in tin based solder joints was examined using shear deformation applied on a simplified representation of a real microstructure of four specific SAC305 solder balls. Commonly observed microstructures in lead free solders are either single crystals or a particular microstructure with solidification twin relationship with about 55-65 rotations about a common [1 0 0] axis (known as beach-ball microstructure [6]). In this study two different single crystals and two different beach-ball microstructures were investigated using CPFE modeling. Simulation results show the ability of CPFE to predict the heterogeneous deformation due to the anisotropic elastic and plastic properties of tin in lead free solder joints.

LanguageEnglish (US)
Pages236-243
Number of pages8
JournalComputational Materials Science
Volume85
DOIs
StatePublished - Apr 1 2014

Profile

Solder Joint
Crystal Plasticity
solders
plastic properties
Tin
Plasticity
Microstructure
Soldering alloys
Finite Element
Crystals
microstructure
tin
Ball
crystals
Finite Element Modeling
balls
Beaches
Single Crystal
beaches
Anisotropy

Keywords

  • Crystal plasticity
  • Electron backscattering diffraction (EBSD)
  • Finite element analysis
  • Lead-Free solder
  • Plastic shear deformation

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemistry(all)
  • Computer Science(all)
  • Physics and Astronomy(all)
  • Computational Mathematics
  • Mechanics of Materials

Cite this

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abstract = "The anisotropy of the tin phase in a Pb-free tin based solder joint has a significant effect on heterogeneous deformation and therefore, the reliability of solder joints. In this study the ability of crystal plasticity finite element (CPFE) modeling to account for elastic and plastic anisotropy in tin based solder joints was examined using shear deformation applied on a simplified representation of a real microstructure of four specific SAC305 solder balls. Commonly observed microstructures in lead free solders are either single crystals or a particular microstructure with solidification twin relationship with about 55-65 rotations about a common [1 0 0] axis (known as beach-ball microstructure [6]). In this study two different single crystals and two different beach-ball microstructures were investigated using CPFE modeling. Simulation results show the ability of CPFE to predict the heterogeneous deformation due to the anisotropic elastic and plastic properties of tin in lead free solder joints.",
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N2 - The anisotropy of the tin phase in a Pb-free tin based solder joint has a significant effect on heterogeneous deformation and therefore, the reliability of solder joints. In this study the ability of crystal plasticity finite element (CPFE) modeling to account for elastic and plastic anisotropy in tin based solder joints was examined using shear deformation applied on a simplified representation of a real microstructure of four specific SAC305 solder balls. Commonly observed microstructures in lead free solders are either single crystals or a particular microstructure with solidification twin relationship with about 55-65 rotations about a common [1 0 0] axis (known as beach-ball microstructure [6]). In this study two different single crystals and two different beach-ball microstructures were investigated using CPFE modeling. Simulation results show the ability of CPFE to predict the heterogeneous deformation due to the anisotropic elastic and plastic properties of tin in lead free solder joints.

AB - The anisotropy of the tin phase in a Pb-free tin based solder joint has a significant effect on heterogeneous deformation and therefore, the reliability of solder joints. In this study the ability of crystal plasticity finite element (CPFE) modeling to account for elastic and plastic anisotropy in tin based solder joints was examined using shear deformation applied on a simplified representation of a real microstructure of four specific SAC305 solder balls. Commonly observed microstructures in lead free solders are either single crystals or a particular microstructure with solidification twin relationship with about 55-65 rotations about a common [1 0 0] axis (known as beach-ball microstructure [6]). In this study two different single crystals and two different beach-ball microstructures were investigated using CPFE modeling. Simulation results show the ability of CPFE to predict the heterogeneous deformation due to the anisotropic elastic and plastic properties of tin in lead free solder joints.

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KW - Electron backscattering diffraction (EBSD)

KW - Finite element analysis

KW - Lead-Free solder

KW - Plastic shear deformation

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