High-strain-rate deformation in ultrasonic additive manufacturing

Hiromichi T. Fujii, Saki Shimizu, Yutaka S. Sato, Hiroyuki Kokawa

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

High-strain-rate deformation in ultrasonic additive manufacturing was analyzed by performing microstructural characterization via electron microscopy. The micro-asperities on the top tape surface, which were formed by contact with the sonotrode surface, underwent cyclic deformation in the shear direction at high strain rates during welding with an additional tape. This caused plastic flow and crushing of the micro-asperities, and a flattened interface was formed between the upper and lower tapes. Further, surface oxide films were fractured and dispersed by ultrasonic vibration, and metallurgical welding was achieved.

Original languageEnglish
Pages (from-to)125-129
Number of pages5
JournalScripta Materialia
Volume135
DOIs
Publication statusPublished - 2017 Jul 1

Keywords

  • Al alloy 6061
  • High-strain-rate deformation
  • Plastic flow
  • Ultrasonic additive manufacturing
  • Ultrasonic welding

ASJC Scopus subject areas

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

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