Abstract
In this paper, the creep behavior of lead-free hypo-eutectic Sn96.5Ag3.0Cu0.5 (SAC305) solder alloy is evaluated. A series of creep tests at different stress/temperature and strain rate/temperature pairs are conducted on joint-scale solder samples under shear. Stress-strain data is reported for constant stress (15-30 MPa) and constant shear strain rate (1E-6-1E-2 s-1) tests at temperatures of 20°C, 50 °C, 75°C, and 100°C. The quantitative data gained from the tests is used to fit an Anand viscoplastic constitutive model. The quality of the model fit and the intrinsic variability of the test specimens are also assessed.
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