63Sn-37Pb和Sn-3Ag-0.5Cu合金钎料的扭转低周疲劳性能  

Torsional Low Cycle Fatigue Properties of 63Sn-37Pb and Sn-3Ag-0.5Cu Alloy Solders

作　　者：郭洪强[1,2] 

机构地区：[1]淄博职业学院化工系,淄博255314 [2]天津大学化工学院,天津300072

出　　处：《机械工程材料》2014年第8期65-69,共5页Materials For Mechanical Engineering

摘　　要：用扭转疲劳试验机对63Sn-37Pb和Sn-3Ag-0.5Cu两种合金钎料在扭转载荷下的低周疲劳性能进行了研究。结果表明:两种钎料均为循环软化材料,它们的变形主要由塑性变形决定;两种钎料的疲劳寿命均随着剪应变幅的减小而显著增大;在相同的剪应变幅下,Sn-3Ag-0.5Cu合金钎料的疲劳寿命比63Sn-37Pb钎料的长,即Sn-3Ag-0.5Cu合金钎料的抗剪切疲劳能力更强。The low cycle fatigue properties of 63Sn-37Pb and Sn-3Ag-0. 5Cu alloy solders at torsional load were studied by torsional fatigue tester. The results show that the two solders are cyclic softening materials and their deformation is dominated by plastic deformation. The fatigue life of the alloy solders all increased with decreasing the shear strain amplitude. Moreover, the fatigue life of Sn-3Ag-0. 5Cu solder was longer than that of 63Sn-37Pb solder at the same shear strain amplitude, indicating that the former had higher resistance to shear fatigue failure.

关 键 词：63Sn-37Pb合金 Sn-3Ag-0.5Cu合金 低周疲劳 扭转疲劳 疲劳寿命 

分 类 号：TG146.1[一般工业技术—材料科学与工程]