Plastic Deformation Kinetics of Eutectic Pb-Sn Solder Joints in Monotonic Loading and Low-Cycle Fatigue
- 1 June 1992
- journal article
- Published by ASME International in Journal of Electronic Packaging
- Vol. 114 (2) , 112-117
- https://doi.org/10.1115/1.2906406
Abstract
The deformation kinetics of near-eutectic Pb-Sn alloys in monotonic and cyclic loading in shear at 300K were investigated by determining the stress exponent n in the Dorn equation using several techniques including strain rate cycling. n was found to be a single-value function of the true stress for the present range of test conditions for both the monotonic and cyclic loading. It ranged from ~4 at the lowest stresses to ~30 at the highest stresses. The n-value of ~4 is concluded to represent dislocation glide and climb as the controlling mechanism, while values of n > 10 reflect power low breakdown.Keywords
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