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无铅焊锡材料的动态力学性能

Keywords: 分离式霍普金森拉压杆,应变率,无铅焊料,动态力学性能

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Abstract:

利用分离式霍普金森拉压杆技术分别对63Sn37Pb、96.5Sn3.5Ag以及96.5Sn3.0Ag0.5Cu在600、1200以及2200s-1应变率下的拉伸和压缩动态力学性能进行了测量,得到了不同应变率下的应力应变曲线.结果表明:3种材料均具有明显的应变率效应,其中,96.5Sn3.5Ag对应变率较为敏感;在相同应变率下96.5Sn3.0Ag0.5Cu呈现出最大的屈服应力和抗拉强度.给出了2种无铅焊料抗拉强度、失效点应变与应变率之间的拟合关系.

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