Variable-parameter NiTi ultrasonic spot welding with Cu interlayer

S. S. Ao, W. Zhang*, C. J. Li, J. P. Oliveira, Z. Zeng, Z. Luo

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)
39 Downloads (Pure)

Abstract

NiTi thin sheets were ultrasonic spot welded with a Cu interlayer, where different welding vibration amplitudes were applied to study the influence on the surface and interface microstructural characteristics, phase transformation behavior and mechanical response of the joints, which aimed to enhance the joint performance by proper optimization of the process parameters. An excellent bonding interface was achieved when an optimized vibration amplitude was applied, with a recrystallized microstructure formed in the Cu foil side near the bonding interface, which helped to improve the mechanical performance of the joints. Joints made with vibration amplitude of 55 mu m had an improved strength compared to the NiTi base material.

Original languageEnglish
Pages (from-to)599-607
Number of pages9
JournalMaterials and Manufacturing Processes
Volume36
Issue number5
DOIs
Publication statusPublished - 4-Apr-2021

Keywords

  • Ultrasonic
  • welding
  • NiTi
  • interlayer
  • parameter
  • microstructure
  • performance
  • fracture
  • MECHANICAL-PROPERTIES
  • AL-ALLOY
  • MICROSTRUCTURE
  • THICKNESS
  • INTERFACE
  • BEHAVIOR
  • METAL

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