Characterization of hot cracking due to welding of high-strength aluminum alloys

C. C. Chang, C. L. Chen, J. Y. Wen, C. M. Cheng, C. P. Chou

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The Spot-Varestraint Test was applied to assess the sensitivity of three aluminum alloys-A2024-T351, A2219-T87, and A7050-T6-to hot cracking from welding. The results indicate that the number of cracks increases with increasing augmented strain. This phenomenon occurs in both the fusion and the heat-affected zones. The number of thermal cycles also has a significant influence on the heat-affected zone; the number of hot cracks increases, especially in the heat-affected zone of the metal weld, with increasing number of thermal cycles. The compositions of these three alloys show that A2024 and A7050 have similar tendencies to be subject to hot cracking, greater than A2219. With increasing number of thermal cycles, the hot cracks show the same tendency, A2024>A7050>2219.

Original languageEnglish
Pages (from-to)658-663
Number of pages6
JournalMaterials and Manufacturing Processes
Volume27
Issue number6
DOIs
Publication statusPublished - 2012 Jun 1

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Keywords

  • Aluminum
  • Hot cracking
  • Thermal cycle
  • Varestraint

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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