Strain-rate and temperature-dependent stress-strain curves of Sn-Pb eutectic alloy

Abstract

Tensile tests on cast Sn-Pb eutectic alloy have been carried out at 25, 100, 140, 170°C and several strain rates ranging from 7×10−3−7×10−5s−1. The stress-strain curves obtained were strongly dependent on strain rate and temperature. Under the conditions tested, higher strainrates gave a higher stress-strain curve and a larger strain at fracture. The tensile strength may be expressed by a power function of strain rate whose exponent and coefficient are governed by a kind of Arrhenius' equation. The nominal stress-strain curves showed significant work softening due to diffuse necking; however, the true stress-strain curve exhibited slight work softening. Thus the elastic perfectly viscoplastic model can be applied to the solder.