Plastic Deformation Kinetics of Eutectic Pb-Sn Solder Joints in Monotonic Loading and Low-Cycle Fatigue

[+] Author and Article Information
Z. Guo, A. F. Sprecher, H. Conrad

Materials Science and Engineering Department, North Carolina State University, Raleigh, NC 27695-7907

J. Electron. Packag 114(2), 112-117 (Jun 01, 1992) (6 pages) doi:10.1115/1.2906406 History: Received August 01, 1991; Online April 28, 2008


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.

Copyright © 1992 by The American Society of Mechanical Engineers
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