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首页> 外文期刊>Journal of Materials Engineering and Performance >Relationship Between Mechanical Properties of Lead-Free Solders and Their Heat Treatment Parameters
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Relationship Between Mechanical Properties of Lead-Free Solders and Their Heat Treatment Parameters

机译：无铅焊料的机械性能与其热处理参数之间的关系

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摘要

The research was undertaken to establish mechanical properties of as-cast and heat-treated Sn-Zn-based alloys of binary and ternary systems as candidates for lead (Pb)-free solder materials for high-temperature applications. The heat treatment of as-cast alloys was made under different combinations of processing parameters (168 h/50℃, 42 h/80℃, and 24 h/110℃). The systematic study of structure-property relationships in Sn-Zn, Sn-Zn-Ag, and Sn-Zn-Cu alloys containing the same amount of Zn (4.5, 9, 13.5 wt.%) and 1 wt.% of either Ag or Cu was conducted to identify the effects of chemical composition and heat treatment processing parameters on the alloy microstructure and mechanical behavior. Structural characterization was made using optical microscopy and scanning electron microscopy techniques coupled with EDS analysis. Mechanical properties (initial Young's modulus E, ultimate tensile strength UTS, elastic limit R_(0.05), yield point R_(0.2), elongation A_5, and necking Z) were determined by means of static tensile tests. All the examined Sn-Zn-based alloys have attractive combination of mechanical characteristics, especially tensile strength, having values higher than that of common leaded solders and their substitutes of Pb-free SAC family. The results obtained demonstrate that the Sn-Zn-based alloys present competitive Pb-free solder candidates for high-temperature applications.
机译：进行了这项研究，以建立铸造和热处理后的二元和三元体系Sn-Zn基合金的机械性能，作为高温应用中无铅（Pb）焊料材料的候选材料。在不同的加工参数组合（168 h / 50℃，42 h / 80℃和24 h / 110℃）下对铸态合金进行热处理。系统研究含相同量的Zn（4.5、9、13.5 wt。％）和1 wt。％Ag的Sn-Zn，Sn-Zn-Ag和Sn-Zn-Cu合金中的结构-特性关系用Cu或Cu来确定化学成分和热处理工艺参数对合金组织和力学行为的影响。使用光学显微镜和扫描电子显微镜技术结合EDS分析进行结构表征。通过静态拉伸试验测定机械性能（初始杨氏模量E，极限抗拉强度UTS，弹性极限R_（0.05），屈服点R_（0.2），伸长率A_5和颈缩Z）。所有检查过的锡锌基合金都具有吸引人的机械特性，尤其是抗拉强度的组合，其值高于普通含铅焊料及其无铅SAC系列的替代品。获得的结果表明，Sn-Zn基合金为高温应用提供了具有竞争力的无铅焊料候选物。

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