Accession Number:

ADA581745

Title:

Modeling of AA5083 Material-Microstructure Evolution During Butt Friction-Stir Welding

Descriptive Note:

Journal article

Corporate Author:

CLEMSON UNIV SC DEPT OF MECHANICAL ENGINEERING

Report Date:

2010-07-01

Pagination or Media Count:

16.0

Abstract:

A concise yet a fairly comprehensive overview of the friction stir welding FSW process is provided. This is followed by a computational investigation in which FSW behavior of a prototypical solution-strengthened and strain-hardened aluminum alloy, AA5083-H131, is modeled using a fully coupled thermo-mechanical finite-element procedure developed in our prior study. Particular attention is given to proper modeling of the welding work-piece material behavior during the FSW process. Specifically, competition and interactions between plastic-deformation and dynamic-recrystallization processes are considered to properly account for the material-microstructure evolution in the weld nugget zone. The results showed that with proper modeling of the material behavior under high-temperaturesevere-plastic-deformation conditions, significantly improved agreement can be attained between the computed and measured post-FSW residual stress and material-strength distribution results.

Subject Categories:

  • Metallurgy and Metallography
  • Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE