Microstructural evolution in dissimilar joint of Al alloy and Cu during ultrasonic welding

Hiromichi T. Fujii, Yuta Goto, Yutaka S. Sato, Hiroyuki Kokawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

Dissimilar joints between 1050 Al alloy and Cu were prepared by ultrasonic spot welding technique to understand the joint characteristics. The joint strength was evaluated by tensile shear strength test. The joint strength increased with increasing joining energy and the joint produced with sufficiently high energy was fractured at the base metal region of Al alloy. The interface microstructure in Al alloy consists of severely deformed region due to ultrasonic vibration. In addition, the fine and equiaxed grains were observed near the joint interface in the specimens fractured at the base metal. These characteristics were significantly different from the microstructure in the bulk region of Al alloy. In contrast, the microstructure in Cu was hardly changed around the interface after ultrasonic welding. Additionally, thin intermetallic compound layer with the thickness of 40 nm was found to be formed at the joint interface in the specimens fractured at the base metal. Peak temperature during ultrasonic welding was found to be approximately 480 K at the interface, which was measured using embedded thermocouple.

Original languageEnglish
Title of host publicationTHERMEC 2013
EditorsB. Mishra, Mihail. Ionescu, T. Chandra
PublisherTrans Tech Publications Ltd
Pages2747-2752
Number of pages6
ISBN (Print)9783038350736
DOIs
Publication statusPublished - 2014
Event8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV, United States
Duration: 2013 Dec 22013 Dec 6

Publication series

NameMaterials Science Forum
Volume783-786
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
CountryUnited States
CityLas Vegas, NV
Period13/12/213/12/6

Keywords

  • Al alloy
  • Cu
  • Recrystallization
  • Shear deformation
  • Ultrasonic welding

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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