Observations of the mechanical response and evolution of damage of AA 6061-T6 under different strain rates and temperatures

A. Dorbane, G. Ayoub, Bilal Mansoor, R. Hamade, G. Kridli, A. Imad

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Investigated in this paper is the mechanical and microstructural response of specimens cut from rolled AA 6061-T6 alloy subjected to uniaxial loading at different temperatures (25, 100, 200, and 300°C) and strain rates (10-4, 10-3, 10-2, 10-1s-1). It was found that the material exhibits a strain rate and temperature dependent behavior. Microstructure observations reveal grains elongated in the loading direction with the average grain size being independent of loading conditions. However, it was observed that loading conditions influence the distribution and shape of the intermetallic phase particles. Micro cracks are observed to occur and are linked to observed damage and, consequently, decrease of ductility. Investigating the root cause of this damage mechanism reveals that particles of intermetallic phase composition are the likely sites of crack initiation. The crack-initiation mechanism at temperatures less than 200°C is identified as crack initiation emanating from these particles while at temperatures of about 300°C the mechanism is identified as interfacial decohesion.

Original languageEnglish
Pages (from-to)239-249
Number of pages11
JournalMaterials Science and Engineering A
Volume624
DOIs
Publication statusPublished - 9 Jan 2015

Fingerprint

strain rate
Strain rate
crack initiation
Crack initiation
damage
Intermetallics
intermetallics
Temperature
temperature
ductility
Phase composition
Ductility
cracks
grain size
Cracks
microstructure
Microstructure
causes

Keywords

  • AA 6061-T6
  • Damage mechanisms
  • Deformation mechanisms
  • Failure mechanisms
  • Strain rate effect
  • Temperature effect

ASJC Scopus subject areas

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

Cite this

Observations of the mechanical response and evolution of damage of AA 6061-T6 under different strain rates and temperatures. / Dorbane, A.; Ayoub, G.; Mansoor, Bilal; Hamade, R.; Kridli, G.; Imad, A.

In: Materials Science and Engineering A, Vol. 624, 09.01.2015, p. 239-249.

Research output: Contribution to journalArticle

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