Characterization of material properties and heat source parameters in welding simulation of two overlapping beads on a substrate plate

Suraj Joshi, Jörg Hildebrand, Abdulkareem S. Aloraier, Timon Rabczuk

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

This paper presents several aspects of characterization of welding heat source parameters in Goldak's double ellipsoidal model using Sysweld simulation of welding of two overlapping beads on a substrate steel plate. The overlap percentages ranged from 40% to 80% in increments of 10%. The new material properties of the fused metal were characterized using Weldware and their continuous cooling transformation curves. The convective and radiative heat transfer coefficients as well as the cooling time t8/5 were estimated using numerical formulations from relevant standards. The effects of the simulation geometry and mesh discretization were evaluated in terms of the factor F provided in Sysweld. Eventually, the parameters of Goldak's double ellipsoidal heat source model were determined for the welding simulation of overlapping beads on the plate and the simulated bead geometry, extent of the molten pool and the HAZ were compared with the macrographs of cross-sections of the experimental weldments. The results showed excellent matching, thus verifying this methodology for determination of welding heat source parameters.

Original languageEnglish
Pages (from-to)559-565
Number of pages7
JournalComputational Materials Science
Volume69
DOIs
Publication statusPublished - 2013 Jan 1

Keywords

  • Continuous cooling transformation curves
  • Cooling time
  • Finite element analysis
  • Goldak's double ellipsoidal heat source model
  • Heat affected zone
  • Welding

ASJC Scopus subject areas

  • Computer Science(all)
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Computational Mathematics

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