Microstructure and Mechanical Properties of Resistance Spot Welds for Fe-based Metallic Glass
Microstructure and Mechanical Properties of Resistance Spot Welds for Fe-based Metallic Glass
复制标题
铁基金属玻璃电阻点焊的显微组织和力学性能
DOI：
10.1007/s11595-018-1917-6
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发表时间：
2018-07
期刊：
影响因子：
--
通讯作者：
龚玉兵
中科院分区：
文献类型：
--
作者：
王善林;龚玉兵
采用电阻点焊方法对铁基金属玻璃薄带进行搭接焊接，并利用X射线衍射和透射电镜对点焊接头的微观组织进行了分析。结果表明，采用优化后的工艺参数，接头成形良好，无飞溅等典型缺陷。透射电镜观察发现，除少量纳米Fe_2B颗粒外，未发现其它晶相颗粒，表明点焊接头组织仍为非晶组织。当焊接电流为1kA，电极压力为30N，焊接时间为0.02ms时，最大拉剪力为45.0N。点焊接头以拔出失效模式沿熔核区界面沿着扩展。研究表明，电阻点焊是一种有效的、实用的铁基非晶合金焊接工艺。
The lap joints of Fe-based metallic glass ribbons were carried by resistance spot welding, and the microstructures of spot welds were investigated by X-ray diffraction and transmission electron microscopy. The results indicated that the perfect formations of joints without typical defects such as spatter were achieved with optimized parameters. Except for little nano-particle Fe2B, no other crystalline particle was detected by TEM, revealing that the most microstructure in spot weld remains amorphous. The maximum tensile-shearing force was 45.0 N with the optimized parameters of 1 kA weld current, 30 N electrode force and 0.02 ms weld time. The spot weld failed as pullout failure mode propagating along the interface of nugget zone. The study demonstrates that resistance spot welding is an effective and practical welding process for Fe-based metallic glass.
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