Study of superplastic deformation mechanisms using atomistic simulation approach

Namas Chandra, P. Dang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Atomistic simulations are performed on a series of grain boundary structures in aluminum. The grain boundary sliding (GBS) of symmetric tilt grain boundaries is always coupled with apparent migration when grain boundary is subjected to an applied shear stress. The propensity for `pure' GBS without migration in aluminum is evaluated by computing the energy associated with incremental equilibrium configurations during the sliding process, and comparing with energy barriers for sliding with migration. In both cases, the magnitude of the energy barriers are found to be lower than that of the energy for two free surfaces suggesting that the GBS and migration are more favorable than the formation of grain boundary cleavage under shear loading conditions.

Original languageEnglish (US)
Title of host publicationSuperplasticity and Superplastic Forming
PublisherMinerals, Metals & Materials Soc (TMS)
Pages53-62
Number of pages10
StatePublished - Jan 1 1998
Externally publishedYes
EventProceedings of the 1998 TMS Annual Meeting - San Antonio, TX, USA
Duration: Feb 15 1998Feb 19 1998

Other

OtherProceedings of the 1998 TMS Annual Meeting
CitySan Antonio, TX, USA
Period2/15/982/19/98

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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