Investigation of Weld Pool Structure and Property Control in Pulsed ARC Welding.

Abstract

Initial findings on a study of the pulsed arc welding solidification structures are reported. Full penetration pulsed current gas tungsten arc welds in Fe-26Ni alloy sheets were dimensionally and structurally analyzed. Temperature profiles at various locations of several weldments were recorded and weld pool kinetics were studied using cinematography, conventional and scanning electron metallography. A two dimensional heat flow computer model of the pulsed arc welding was developed. Experimental data were comparatively analyzed against the early predictions of the model. Thermal conductivity and thermal diffusivity of the alloy, as well as heat transfer efficiency of the pulsed current GTAW process were estimated for use as computer input. In addition, melting efficiency of the process under various sets of pulsed welding variables was determined. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 31, 1978
Accession Number
ADA062063

Entities

People

  • G. M. Ecer

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Arc Welding
  • Energy
  • Experimental Data
  • Heat Energy
  • Heat Of Fusion
  • Heat Transfer
  • Heat Transmission
  • Materials
  • Materials Engineering
  • Mathematical Models
  • Temperature Gradients
  • Thermal Conductivity
  • Thermal Diffusivity
  • Waveforms
  • Welded Joints
  • Welding
  • Welds

Fields of Study

  • Materials science

Readers

  • Aerospace Propulsion Engineering.
  • Metallurgy
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics