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首页> 外文期刊>Journal of Materials Engineering and Performance >Refill Friction Stir Spot Welding Dissimilar Al/Mg Alloys
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Refill Friction Stir Spot Welding Dissimilar Al/Mg Alloys

机译：重新填充摩擦搅拌点焊接不同的Al / mg合金

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摘要

Dissimilar Al/Mg alloys were joined by refill friction stir spot welding (RFSSW) in this work. The effect of sleeve plunge depth on microstructure and mechanical properties of the joints was studied. The results showed that sound joint can be obtained at sleeve plunge depth of 2.4 mm. Intermetallic compounds (IMCs) layer, formed by the liquid eutectic phase, were observed at both the sleeve-affected zone and joint center. The IMC at the pin-affected zone was thicker than that at the sleeve-affected zone because of its flow characteristic. Less liquid eutectic phase formed during RFSSW when joint using Mg as the upper sheet because the oxide layer on the Al sheet was hard to break, resulting to thinner IMC layer. The maximum load of 3.6 kN was obtained at 2.6 mm when the Al alloys served as the upper sheet, and the maximum failure of 3.6 kN was also obtained at 2.4 mm when the Mg alloys served as the upper sheet. The RFSSW joint presented shear fracture mode. The XRD patterns showed that the IMC of Al3Mg2 and Al12Mg17 formed inside the joint.
机译：在这项工作中通过补充摩擦搅拌点焊（RFSSW）加入不同的Al / Mg合金。研究了套筒进降深度对关节微观结构和力学性能的影响。结果表明，可在2.4mm的套筒插入深度下获得声音接头。通过液体共晶相形成的金属间化合物（IMCs）层在套筒影响的区域和关节中心观察到。由于流动特性，销患区的IMC厚于套筒影响区域。当使用Mg作为上片的接头时，在RFSSW期间形成的液体共晶相较少，因为Al片材上的氧化物层难以破裂，导致IMC层较薄。当Mg合金用作上片时，在2.4mm时，也可以在2.6mm时在2.6mm处获得3.6kn的最大载荷。 RFSSW接头呈现剪切断裂模式。 XRD图案显示Al3mg2和Al12mg17的IMC在接头内形成。

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