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首页> 外文学位 >Creep behavior of solder joints under combined shear and tensile stresses.
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Creep behavior of solder joints under combined shear and tensile stresses.

机译：组合剪切应力和拉伸应力下焊点的蠕变行为。

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摘要

An experimental investigation was conducted to characterize and measure the contributions of shear and tensile strain components to the overall creep behavior of solder joints. Each copper substrate test vehicle consisted of two halved dog-bone shaped coupons and formed a butt joint at 0°, 30°, 45°, 60°, and 90° angles. Eutectic Pb-63Sn solder and Sn3.0Ag0.5Cu (SAC 305) lead-free solder alloy were used to solder the coupons. The specimens were subjected to 5.2 MPa tensile stress for three days in a thermal chamber at 25°C, 37°C, and 100°C. The experimental results revealed that both tensile creep strains and shear creep strains contribute to the combined creep curves. For both Pb-63Sn and SAC 305 solder joints, the contributions of both tensile strains and shear strains to combined strains were found to be significant. Thus, the orientations of angles have a significant impact on the creep behavior of solder joints. The creep resistance of the SAC 305 solder joints was greater than that of the Pb-63Sn solder joints for all the conditions tested.
机译：进行了实验研究，以表征和测量剪切和拉伸应变分量对焊点整体蠕变行为的影响。每个铜基板测试载具包括两个对折的狗骨形试样，并以0°，30°，45°，60°和90°的角度形成对接。使用共晶Pb-63Sn焊料和Sn3.0Ag0.5Cu（SAC 305）无铅焊料合金来焊接试样。在25°C，37°C和100°C的热室中，使样品经受5.2 MPa的拉应力三天。实验结果表明，拉伸蠕变应变和剪切蠕变应变都有助于组合蠕变曲线。对于Pb-63Sn和SAC 305焊点，拉伸应变和剪切应变对组合应变的贡献均很显着。因此，角度的方向对焊点的蠕变行为具有重大影响。在所有测试条件下，SAC 305焊点的抗蠕变性均高于Pb-63Sn焊点。

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  • 作者

    Allami, Melika.;

  • 作者单位

    San Jose State University.;

  • 授予单位 San Jose State University.;
  • 学科 Engineering Biomedical.
  • 学位 M.S.
  • 年度 2014
  • 页码 106 p.
  • 总页数 106
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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