Investigation on Mode I propagation behavior of fatigue crack in precipitation-hardened aluminum alloy with different Mg content

S. F. Anis, M. Koyama, H. Noguchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The influence of excess Mg on the Mode I propagation of fatigue crack was examined in newly developed precipitation-hardened Al alloy containing Zr and excess Mg. The aim of this study was to evaluate the underlying factor affecting fatigue crack growth rate in the stage II region. For this purpose, the rotating bending fatigue tests were performed in constant amplitude loading, and replication technique with an optical microscope was used to measure the crack growth in the Al alloys. Through analyses of the crack propagation on the specimen surface and striation formation of the fracture surface, the effects of excess Mg in the Al alloys were clarified to promote the occurrence of mode I fatigue crack, and decelerate the fatigue crack propagation. These facts suggest that the dynamic strain aging of Mg induces the formation of fatigue striation and reduce the driving force of the crack propagation. The findings were supported by the fractographic observations in the fatigue crack propagation region.

Original languageEnglish
Title of host publicationEngineering and Innovative Materials V
EditorsMuhammad Yahaya
PublisherTrans Tech Publications Ltd
Pages143-147
Number of pages5
ISBN (Print)9783038357704
DOIs
Publication statusPublished - 2017
Externally publishedYes
Event5th International Conference on Engineering and Innovative Materials, ICEIM 2016 - Kuala Lumpur, Malaysia
Duration: 2016 Sep 102016 Sep 12

Publication series

NameMaterials Science Forum
Volume889 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference5th International Conference on Engineering and Innovative Materials, ICEIM 2016
CountryMalaysia
CityKuala Lumpur
Period16/9/1016/9/12

Keywords

  • Al6061-T6 alloy
  • Dynamic strain aging
  • Fatigue striation
  • Mode I crack
  • Rotating bending fatigue test

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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