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Relationship of Mechanical and Micromechanical Properties with Microstructural Evolution of Sn-3.0Ag-0.5Cu (SAC305) Solder Wire Under Varied Tensile Strain Rates and Temperatures

  • Izhan Abdullah
  • Muhammad Nubli Zulkifli
  • Azman JalarEmail author
  • Roslina Ismail
  • Mohd Arrifin Ambak
Article
  • 1 Downloads

Abstract

A characterization of mechanical and micromechanical properties of SAC305 solder wire under varied strain rates and temperatures was performed using tensile and nanoindentation tests. The evolution of SAC305 lead-free solder wire grains was compared in samples that were subjected to various strain rates and temperatures using tensile tests based on ASTM E12 standards. Different behaviours of mechanical properties, micromechanical properties, and microstructure evolution of SAC305 solder wire were observed when either temperature or strain rate was held constant and the other varied. Both tensile and nanoindentation tests produced qualitative results, such as dynamic recovery and occurrence of pop-in events, that reflected changes of microstructure. It was observed that some of the mechanical properties of SAC305 solder wire, namely yield strength (YS), ultimate tensile strength (UTS) and Young’s modulus, showed the same trends, but with lower values, compared to micromechanical properties obtained from nanoindentation tests based upon hardness and reduced modulus. Microstructure examination further confirms that the YS, UTS and hardness values increase with more solder wire grain refinement. SAC305 solder wire also maintained an equiaxed structure under various strain rates and temperatures.

Keywords

Lead-free solder SAC305 mechanical properties micromechanical properties nanoindentation tensile test microstructure 

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Notes

Acknowledgement

This work is supported by the Universiti Kebangsaan Malaysia (UKM) under Research University Grants (UKM-OUP-NBT-29-143/2011, OUP-2012-120 and DIP-2012-14).

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan MalaysiaSelangorMalaysia
  2. 2.Universiti Kuala Lumpur (UniKL), British Malaysia Institute (BMI), Electrical Engineering SectionGombakMalaysia
  3. 3.Visual Arts Program, Cultural CentreUniversity of MalayaKuala LumpurMalaysia
  4. 4.RedRing Solder (Malaysia) Sdn. Bhd. (RSM)Batu CavesMalaysia

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