Fractography of fatigue cracks in aluminium alloy AA7050 subjected to interrupted ageing and retro-ageing heat treatments

André L.M. Carvaiho, Juliana P. Martins, Enrico Salvati, Tan Sui, Alexander M. Korsunsky

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

Abstract

Novel heat treatments for aerospace aluminium alloys allow simultaneous improvements of ductility and strength. In the present study we consider the effects of retroageing and interrupted heat treatments of aluminium alloy AA7050 on its fatigue behaviour, including the consequences of crack closure for fatigue crack growth rate. SEM fractography is used to visualise striations associated with crack front advance in individual cycles, and a correlation is made with the overall crack growth rate, and the conditions of crack propagation.

Original languageEnglish
Title of host publicationIMECS 2016 - International Multiconference of Engineers and Computer Scientists 2016
EditorsDavid Dagan Feng, Alexander M. Korsunsky, S. I. Ao, Craig Douglas, Oscar Castillo
PublisherNewswood Limited
Pages679-684
Number of pages6
ISBN (Electronic)9789881404763
Publication statusPublished - 2016
Externally publishedYes
EventInternational Multiconference of Engineers and Computer Scientists 2016, IMECS 2016 - Tsimshatsui, Kowloon, Hong Kong
Duration: 16 Mar 201618 Mar 2016

Publication series

NameLecture Notes in Engineering and Computer Science
Volume2
ISSN (Print)2078-0958

Conference

ConferenceInternational Multiconference of Engineers and Computer Scientists 2016, IMECS 2016
Country/TerritoryHong Kong
CityTsimshatsui, Kowloon
Period16/03/1618/03/16

Keywords

  • Ageing treatment
  • Aluminium alloy
  • Fatigue crack
  • Fractography

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