Heat treatment effect on thermo-mechanical fatigue and low cycle fatigue behaviors of A356.0 aluminum alloy

Mehdi Mokhtarishirazabad, mohammad Azadi

Research output: Contribution to journalArticle (Academic Journal)peer-review

50 Citations (Scopus)
215 Downloads (Pure)

Abstract

In the present paper, the heat treatment effect on A356.0, a cast aluminum alloy which has been widely used in diesel engine cylinder heads, is investigated under out-of-phase thermo-mechanical fatigue and low cycle fatigue (at different temperatures) loadings. A typical heat treatment is applied to the material including 8 h solution at 535 °C, water quench and 3 h ageing at 180 °C. The experimental fatigue results show that the heat treatment process has considerable influence on mechanical and low cycle fatigue behaviors, especially at room temperature, but its effect on thermo-mechanical fatigue lifetime is not significant. The improvement in the strength can be explained by the dislocation theory. Under thermo-mechanical fatigue loadings, the difference between the fatigue lifetime of A356.0 alloy and A356.0-T6 alloy decreases when the temperature range increases. In this condition, plastic strain increases severely during the fatigue cycles in A356.0-T6 alloy due to over-ageing phenomenon and therefore, the amount of cyclic softening in heat treated alloy is more.
Original languageEnglish
Pages (from-to)279-285
Number of pages7
JournalMaterials and Design
Volume45
DOIs
Publication statusPublished - 1 Mar 2013

Keywords

  • Aluminum alloy
  • Heat treatment
  • Low cycle fatigue
  • Thermo-mechanical fatigue

Fingerprint Dive into the research topics of 'Heat treatment effect on thermo-mechanical fatigue and low cycle fatigue behaviors of A356.0 aluminum alloy'. Together they form a unique fingerprint.

Cite this