Sn-Pb系およびSn-Ag系共晶はんだの硬さ試験による力学特性評価
Sn-Pb系およびSn-Ag系共晶はんだの硬さ試験による力学特性評価
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Sn-Pb和Sn-Ag共晶焊料的硬度测试评价机械性能
DOI：
10.2472/jsms.49.666
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
T. Ohsawa
中科院分区：
文献类型：
--
作者：
Takeshi Ogawa;Akira Miyamoto;Kazunori Ohshimizu;T. Ohsawa
提出了一种评价焊料力学性能的简便方法。在该方法中，维氏硬度采用时间相关表达式，HV=HV0·tcv，其中HV和tv分别为维氏硬度和压痕时间。HV0和c两个材料参数分别与无蠕变贡献的硬度和蠕变变形的显著性有关。采用上述方法在室温下对Sn-37Pb和Sn-3.5Ag共晶焊料进行时效处理，时效温度分别为：Ta<10℃，Ta= rt， 125℃（Sn-37Pb）和160℃（Sn-3.5Ag）。基于弹塑性蠕变理论，采用有限元方法模拟维氏压痕，将HV0和c与屈服应力和蠕变的诺顿定律联系起来。利用该方法研究了时效对两种共晶钎料力学性能的影响。
A convenient method for evaluating mechanical properties of solder materials was proposed in this study. In the method, Vickers hardness was evaluated by time dependent expression, HV=HV0·tcv, where HV and tv are Vickers hardness and indenting time. Two material parameters, i.e. HV0 and c, are related to the hardness without creep contribution and the significance of creep deformation, respectively. Above method was performed at room temperature for eutectic solders of Sn-37Pb and Sn-3.5Ag aged at three levels of aging temperature, Ta<10°C, Ta=R.T., 125°C (Sn-37Pb) and 160°C (Sn-3.5Ag). Finite element analysis was performed to simulate the Vickers indentation based on the elastic-plastic-creep deformation in order to correlate HV0 and c with yield stress and Norton's law for creep deformation. Using the proposed method, aging effect on the mechanical properties for the two systems of eutectic solders was also investigated.