FATIGUE FRACTOGRAPHS FOR BUTT-WELDED JOINTS OF A5083 ALUMINUM ALLOY.

Chitoshi Masuda, Satoshi Nishijima, Masuo Shimodaira

Research output: Contribution to journalArticle

Abstract

A fractographic study has been performed on fatigue fractured butt-welded joints of an aluminum alloy, frequently used for low temperature applications. The area fraction of crystallographic facets, which takes the maximum in the lower range of stress intensity factor, DELTA K, decreased monotonically with an increase in DELTA K, and became zero at DELTA K of approximately 9 MPa m**1**/**2. The tendency of this evolution was found to be the same, irrespective of base metal or weld metal, as well as for the position of the facet which could be near or deep under the specimen surface. For higher values of DELTA K, the coverage of the striation facets became predominant, and the striation spacing was linearly correlated with DELTA K on log-log co-ordinates regardless of the metallurgical differences. The crack plane and propagation direction indicated that the striation formation mechanism could be explained by the model proposed R. M. Pelloux.

Original languageEnglish
Pages (from-to)816-821
Number of pages6
JournalZairyo/Journal of the Society of Materials Science, Japan
Volume30
Issue number335
Publication statusPublished - 1981 Aug

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Metals and Alloys
  • Polymers and Plastics

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