Sn-Pb系はんだの機械的性質に及ぼす温度およびひずみ速度の影響

概要

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This paper describes the tensile property of six kinds of Sn-Pb solders. Static tension tests were carried out at strain rates ranging from 0.001%/sec to 2.0% / sec using 5Sn-95Pb, 10Sn-90Pb, 40Sn-60Pb, 60Sn-40Pb, 63Sn-37Pb, and 62Sn-36Pb-2Ag solders at 313-398 K. Strain rates faster than 2.0%/sec were required to obtain time-independent Young's modulus and yield stress of the solders. In tests at the strain rates slower than 2.0%/sec, creep deformation was included in the stress-strain relationship, and Young's modulus and yield stress which do not depend on time could not be obtained. A new equation which can predict tensile strength of Sn-Pb solders as functions of temperature, strain rate and chemical composition were proposed. New equations were also proposed for predicting Young's modulus and yield stress as functions of temperature and chemical composition. These equations predict Young's modules and yield stress within a factor of 1.25 and 1.15,respectively. Low cycle fatigue lives were discussed based on the universal slope method.
一般社団法人日本機械学会の論文
1999-04-25