Enhanced interfacial reaction and mechanical properties of laser welded-brazed Mg/Ti joints with Al element from filler
Enhanced interfacial reaction and mechanical properties of laser welded-brazed Mg/Ti joints with Al element from filler
复制标题
填料中铝元素增强激光钎焊 Mg/Ti 接头的界面反应和机械性能
DOI：
10.1016/j.matlet.2015.12.119
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发表时间：
2016-03-15
影响因子：
3
通讯作者：
Feng, Jicai
中科院分区：
文献类型：
--
作者：
Tan, Caiwang;Song, Xiaoguo;Feng, Jicai
镁和钛合金之间的异种金属连接采用激光钎焊工艺进行。与直接连接时的机械连接相比，通过在镁基填料中添加Al元素，成功实现了不混溶的AZ31镁和TC4钛的冶金连接。在AZ91（9%Al）熔合区/Ti界面处观察到明显的超薄锯齿状反应层，并通过透射电子显微镜（TEM）鉴定为Ti3Al相，可以有效阻止裂纹扩展，从而提高接头强度。使用AZ91填料的接头的平均断裂载荷可以达到1947+/-61N，相对于镁母材，接头效率为47.3+/-1.5%，比使用AZ31填料的接头效率高85%。 (C) 2015 Elsevier B.V. 保留所有权利。
Dissimilar metal joining between magnesium and titanium alloys was performed using laser welding brazing process. Metallurgical bonding of immiscible AZ31 magnesium and TC4 titanium was successfully achieved by adding Al element into Mg based filler, compared to mechanical bonding when direct joining. An ultra-thin serrated-shape reaction layer was evidently observed at the interface of AZ91 (9% Al) fusion zone/Ti and identified as Ti3Al phase by transmission electron microscopy (TEM), which could prevent crack propagation effectively and thus improved the joint strength. The average fracture load of joint with AZ91 filler could reach 1947 +/- 61 N representing 47.3 +/- 1.5% joint efficiency relative to the magnesium base metal, which was 85% higher than that with AZ31filler. (C) 2015 Elsevier B.V. All rights reserved.