DEVELOPMENT OF ULTRASONIC WELDING EQUIPMENT FOR REFRACTORY METALS

Abstract

Ultrasonic welding equipment consisting of a highly stable and precisely adjustable motor-alternator frequency converter, new cartridge-type ceramic transducers exhibiting overall efficiencies in the range of 75 to 85 percent, and heavy-duty, force-insensitive acoustic coupling systems were developed and/or designed, built, and successfully utilized with the view to spot welding such refractory metals and superalloys as Rene 41, Mo-0.5Ti alloy, columbium, PH15-7Mo stainless steel, and tungsten. The equipment provides for programming the electrical power delivered to the transducers and the clamping force applied to the weldment so that improved impedance matching and better control of the welding process can be effected. Ultrasonic spot-type welds were made with this equipment in materials and thicknesses not heretofore achievable.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1966
Accession Number
AD0805241

Entities

People

  • Nicholas Maropis

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Fabrication
  • Joints
  • Manufacturing
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Physical Properties
  • Sheet Metal
  • Standing Waves
  • Test And Evaluation
  • Transducers
  • Transition Temperature
  • Tungsten

Fields of Study

  • Materials science

Readers

  • Electrical Engineering
  • Metallurgy