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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure and Strengthening Mechanism of Ti/Cu Laminated Composite Produced by Underwater Explosive Welding
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Microstructure and Strengthening Mechanism of Ti/Cu Laminated Composite Produced by Underwater Explosive Welding

机译：水下爆炸焊接生产Ti / Cu层压复合材料的微观结构和强化机理

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摘要

A laminated structure is applied to strengthen metal alloys by a microstructure design strategy. Explosive welding is an important manufacturing method to realize the joining of laminated composites. Therefore, in this research, three Ti layers and two Cu layers (the thickness of each layer is 0.5 mm) are stacked alternatively to produce a Ti/Cu laminated composite by underwater explosive welding. Different microstructural techniques (i.e., optical microscopy and scanning electron microscopy) all reveal that the Ti/Cu laminated composite has a characteristic laminated structure with remarkably fine and elongated grains but no cracks. Tensile testing results indicate that the Ti/Cu laminated composite has a high ultimate tensile strength that is approximately 2 times higher than the estimated value for Cu and Ti mixtures. Microscopy observations reveal that the deformed microstructure and strong bonding interface of the Ti/Cu laminated composite can activate work hardening strengthening, terminate cracks and inhibit necking simultaneously, which leads to the high ultimate tensile strength of the composite. The present laminated structure with an improved strength provides an approach to strengthen similar metal alloys.
机译：通过微结构设计策略应用层压结构以加强金属合金。爆炸焊接是实现层压复合材料的连接的重要制造方法。因此，在该研究中，三个Ti层和两个Cu层（每层的厚度为0.5mm），可选地通过水下爆炸焊接产生Ti / Cu层压复合材料。不同的微观结构技术（即，光学显微镜和扫描电子显微镜）均显示Ti / Cu层压复合材料具有明显细小和细长的晶粒的特征层压结构，但没有裂缝。拉伸试验结果表明Ti / Cu层压复合材料具有高的极限拉伸强度，其比Cu和Ti混合物的估计值高约2倍。显微镜观察表明，Ti / Cu层压复合材料的变形微观结构和强粘合界面可以激活硬化强化，终止裂缝并同时抑制颈缩，这导致复合材料的高极性拉伸强度。具有改进强度的本层叠结构提供了加强类似金属合金的方法。

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