Development of localized deformation in AA 2024-0

S. Kweon, A. J. Beaudoin, P. Kurath, M. Li

Research output: Contribution to journalArticlepeer-review

Abstract

An experimental study is presented to (1) quantify the rate-sensitive mechanical response and (2) examine the localized deformation behavior under an applied temperature gradient in the alloy AA 2024. Isothermal flow stresses are obtained at temperatures from-100°C to 495°C and strain rates from 10-2/s to 10-5/s using routine compression tests and a novel cyclic test, which expedites the characterization. The material displays two distinct kinetic responses with both being amenable to localization phenomena. The lower temperature/high strain rate regime displays a rate-insensitive yield with Stage III/IV work hardening. At higher temperature/low strain rates, a rate-sensitive response with little work hardening is observed. In order to relate the material constitutive behavior to the development of localized deformation, a temperature gradient test is performed wherein temperature differences of approximately 30°C are enforced between the top and bottom surfaces of a cylindrical compression test specimen. Deformation heterogeneity developed in the two distinct regimes of material response is illustrative of warm and hot working conditions typical of industrial processes, such as rolling.

Original languageEnglish (US)
Pages (from-to)310091-310098
Number of pages8
JournalJournal of Engineering Materials and Technology, Transactions of the ASME
Volume131
Issue number3
DOIs
StatePublished - Jul 1 2009

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Development of localized deformation in AA 2024-0'. Together they form a unique fingerprint.

Cite this