Abstract
This paper describes the multiaxial low cycle fatigue of Sn-8Zn-3Bi solder. Push-pull and reversed torsion proportional and non-proportional loading tests were carried out using 5 strain paths at a strain rate 0.5%/s on the von Mises basis. The effects of strain multiaxiality and non-proportionality on low cycle fatigue life were discussed. Non-proportional loading reduced the low cycle fatigue life of the solder resulting from the additional hardening by the non-proportional loading. The non-proportional strain, recently proposed by the authors, predicted the fatigue life under non-proportional loading within a factor of two band.
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