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Damage mechanisms of 5A06 Al alloy weld joints under constant load and thermal cycling condition

  • Cheng Jin*
  • , Jitai Niu
  • , Shiyu He
  • , Hongbin Geng
  • , G. Long
  • *Corresponding author for this work
  • Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, the micro-damage mechanisms of 5A06 Al alloy weld joints have been studied under the condition of constant load and cyclic thermal load. The mechanical performance variation of the base material and its weld joint are analyzed and compared. Microstructure analysis reveals that the main damage mechanism in weld joints is the interior voids nucleation and growth. The voids distribution and evolution govern the damage process. Test results also show most fractures occur at HAZ near the welding fusion line. The development of these voids results in the performance deterioration of the weld joints under thermal cycling condition.

Original languageEnglish
Title of host publicationSupplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006
PublisherTrans Tech Publications Ltd
Pages368-373
Number of pages6
EditionPART 1
ISBN (Print)0878494286, 9780878494286
DOIs
StatePublished - 2007
Externally publishedYes
Event5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006 - Vancouver, Canada
Duration: 4 Jul 20068 Jul 2006

Publication series

NameMaterials Science Forum
NumberPART 1
Volume539-543
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006
Country/TerritoryCanada
CityVancouver
Period4/07/068/07/06

Keywords

  • Failure mechanism
  • Micro-damage
  • Thermal cycling
  • Void
  • Welding

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