Determination of GTA Welding Efficiencies

Abstract

A method is developed for estimating welding efficiencies for moving arc GTAW processes. Under quasi-conditions, the net heat transfer rate from the weld pool to the work piece is estimated from a 3-D numerical heat transfer conduction model. The dimensions of the weld pool used in the computational model are obtained experimentally using a laser vision system and by metallurgical examination. The welding efficiency is then calculated by dividing the net heat transfer rate by the total power input during the experiments. Efficiencies are measured for a range of power inputs and torch speeds and then compared with those available in the literature.... Laser arc welding, Solidification parameters, Numerical methods, Determining welding efficiencies.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1993
Accession Number
ADA267163

Entities

People

  • Candonino P. Franche

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Arc Welding
  • Cameras
  • Efficiency
  • Energy
  • Energy Transfer
  • Engineering
  • Equations
  • Gas Tungsten Arc Welding
  • Geometry
  • Heat Transfer
  • Materials
  • Mechanical Engineering
  • Mechanical Properties
  • Physical Properties
  • Recording Systems
  • Thermal Conductivity
  • Three Dimensional

Fields of Study

  • Materials science

Readers

  • Computational Modeling and Simulation
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Metallurgy

Technology Areas

  • Directed Energy