STP1186: Modeling of the Thermomechanical Fatigue of 63Sn-37Pb Alloy

    Hacke, PL
    Graduate student, senior research associate, and professor, North Carolina State University, Raleigh, NC

    Sprecher, AF
    Graduate student, senior research associate, and professor, North Carolina State University, Raleigh, NC

    Conrad, H
    Graduate student, senior research associate, and professor, North Carolina State University, Raleigh, NC

    Pages: 15    Published: Jan 1993


    Abstract

    The stress-strain hysteresis behavior of 63Sn-37Pb solder joints in thermomechanical cycling was determined experimentally with a bimetallic loading frame for temperature excursions between — 30 and 130°C applied in triangular waveform for periods of 12, 24, 48, and 300 min. A computer simulation based on a constitutive equation previously formulated for steady-state creep conditions yielded reasonable agreement between the predicted and measured hysteresis behavior. An approximately linear relationship was found between the drop in maximum load in a hysteresis cycle and the measured fatigue cracked area.

    Keywords:

    solder, fatigue, thermomechanical fatigue, fatigue modeling, fatigue crack growth, steady-state creep, constitutive equation


    Paper ID: STP24251S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP24251S


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