Temperature sensitivity and prediction of the mechanical behaviors of ultrafine grained aluminum under uniaxial compression

Quanwei Zhan, Tao Suo, Cunxian Wang, Kui Xie, Zhongbin Tang

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

In the present work, we explore the strain hardening behaviors as well as the effect of temperature on the plastic deformation of ultrafine grained aluminum. The temperature sensitivity is determined and compared with that of coarse grained material. The results indicate that the flow stress of ultrafine grained aluminum displays enhanced sensitivity to temperature. The reduction in activation volume is suggested to be the major reason for the enhanced temperature sensitivity as grain size is refined into the sub-micrometer regime. Finally, a phenomenological constitutive model is proposed to describe the post-yield response of ultrafine grained aluminum.

Original languageEnglish
Pages (from-to)373-382
Number of pages10
JournalActa Mechanica Solida Sinica
Volume27
Issue number4
DOIs
StatePublished - 2014

Keywords

  • Compressive behavior
  • Constitutive relation
  • Strain hardening behavior
  • Temperature sensitivity
  • Ultrafine grained aluminum

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