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Abstract

This article presents constant-load creep and stress relaxation data for Sn3.8Ag0.7Cu spanning a range of strain rates 10 À8 s À1 < _ e < 10 À4 s À1 ; and temperatures 25°C, 75°C, and 100°C. Creep and stress relaxation measurements showed that transient creep caused faster strain rates during stress relaxation for a given stress than the corresponding minimum creep rate from constant-load creep tests. The extent of strain hardening during primary creep was a function of temperature and strain rate. Data reduction incorporated a fast Fourier transform method to remove spurious data from stress relaxation corresponding to the period of partial strain relaxation during loading.

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