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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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无铅焊料sn-3.8ag-0.7cu的低周疲劳行为
Keywords: 金属材料,sn合金,低周疲劳,无铅焊料,力学性
Abstract:
？测量了sn-3.8ag-0.7cu无铅焊料试样的循环滞后回线、循环应力响应曲线、循环应力-应变和应变-寿命关系，研究了焊料在总应变幅控制下的低周疲劳行为。结果表明：该焊料合金在较高总应变幅较高（1%）时发生连续的循环软化，而在低总应变幅较低（≤0.4%）时则表现为循环稳定。线性回归分析表明，该焊料的低周疲劳寿命满足coffin-manson经验关系式，由此给出了焊料在室温下的低周疲劳参数。采用扫描电镜观测和分析了焊料在疲劳前后的组织特征。
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