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论文类型：期刊论文

发表时间：2017-01-01

发表刊物：SCRIPTA MATERIALIA

收录刊物：SCIE、EI

卷号：126

页面范围：58-62

ISSN号：1359-6462

关键字：Magnesium alloy; Titanium alloy; Ultrasonic welding

摘要：This research explores the joining between dissimilar alloys (magnesium alloy and titanium alloy) by ultrasonic spot welding. The tensile shear test shows that the joint strength increases with energy input. The fracture initiates inside magnesium alloy, indicating a high joining strength at the weld interface. Banded grain-refinement is found at the interface on the magnesium alloy side, neither transition layer nor inter-metallic compound layer is identified though. The interfacial temperature exceeds the temperature range for liquefying magnesium alloy. The precipitated aluminum from the liquid-phase magnesium alloy plays a bridging role in ultrasonic welding of magnesium alloy to titanium alloy. (C) 2016 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.