Quantitative evaluation of porosity effect on fatigue strength of high pressure die cast aluminum alloy (Part 1, experimental investigation for effect of porosity and casting surface)

Osamu Kuwazuru, Yozo Murata, Takao Utsunomiya, Yoshihiko Hangai, Takayuki Yano, Sujit Bidhar, Yoshinori Shiihara, Soichiro Kitahara, Nobuhiro Yoshikawa

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Effect of casting defects on the fatigue strength of die cast aluminum alloy was addressed through the tension-compression fatigue test and the X-ray CT inspection, which revealed the amount of porosity included in the specimen. Six types of casting condition were employed to examine the effect of different porosity. Most of fatigue crack sources were the pores. The porosity volume fraction was calculated for all specimens from the three-dimensional X-ray CT images. The fatigue limit of each specimen type was estimated from the fatigue test results. The correlations among fatigue limit, porosity volume fraction, Vickers hardness, and dendrite arm spacing were evaluated, and the result showed that the porosity volume fraction most dominantly affected the fatigue limit in the averaged sense.

Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume77
Issue number773
Publication statusPublished - 2011
Externally publishedYes

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Keywords

  • Aluminum Alloy
  • Casting Defect
  • Casting Surface
  • Die Cast
  • Fatigue
  • Fractography
  • Hardness
  • Porosity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

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