A comparison of the creep behaviour of joint-scale SAC105 and SAC305 solder samples under shear conditions

Cillian Burke, Jeff Punch

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This study compares the creep behavior of joint-scale Sn1.0Ag0.5Cu (SAC105) and Sn3.0Ag0.5Cu (SAC305) solder samples under shear loading. The basis of the comparison is experimentally derived Anand viscoplastic constitutive models for the alloys. A series of monotonic constant shear stress and constant shear strain rate tests was conducted at temperatures of 20°C, 50°C, 75°C and 100°C for SAC105 in order to provide data to extract the constitutive model parameters. The predictions of the Anand model are compared graphically with the experimental data for SAC105 in order to illustrate goodness-of-fit. The Anand parameters are shown to capture the creep performance of the SAC105 solder under shear loading very well, with the experimental data being tightly bound to the Anand predictions. For comparison, model parameters for SAC305 are taken from previously published work at the authors' institution. In terms of practical usage, SAC105 is noted to be preferable for applications which may experience high strain rate stimuli (portable electronic devices) as the alloy undergoes plastic flow at lower stress levels than SAC305, minimizing the risk of interfacial failures. Conversely, SAC305 is superior for applications which feature thermo-mechanical fatigue (desktop computers, for example, or servers) as it accumulates less strain than SAC105.

Original languageEnglish
Title of host publication2012 13th International Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, EuroSimE 2012
DOIs
Publication statusPublished - 2012
Event2012 13th International Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, EuroSimE 2012 - Cascais, Portugal
Duration: 16 Apr 201218 Apr 2012

Publication series

Name2012 13th International Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, EuroSimE 2012

Conference

Conference2012 13th International Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, EuroSimE 2012
Country/TerritoryPortugal
CityCascais
Period16/04/1218/04/12

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