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Indexed by:期刊论文

Date of Publication:2017-01-01

Journal:SCRIPTA MATERIALIA

Included Journals:SCIE、EI

Volume:126

Page Number:58-62

ISSN No.:1359-6462

Key Words:Magnesium alloy; Titanium alloy; Ultrasonic welding

Abstract: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.