Mechanical and microstructural characterization of 6061 aluminum alloy strips severely deformed by Dissimilar Channel Angular Pressing


Tan E., KİBAR A. A., Gur C. H.

MATERIALS CHARACTERIZATION, vol.62, no.4, pp.391-397, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 62 Issue: 4
  • Publication Date: 2011
  • Doi Number: 10.1016/j.matchar.2011.01.016
  • Journal Name: MATERIALS CHARACTERIZATION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.391-397
  • Keywords: Severe plastic deformation, DCAP, Transmission electron microscopy, 6061 Al-alloy, Strip, BEHAVIOR, TEXTURES, METALS
  • Middle East Technical University Affiliated: Yes

Abstract

Dissimilar Channel Angular Pressing (DCAP) is a severe plastic deformation technique to improve the mechanical properties of flat products by producing ultrafine grains. In this study, the changes in the microstructure and mechanical properties of 6061 Al-alloy strips deformed by various numbers of DCAP passes were investigated. Some DCAPed samples were also held at 200 degrees C and 350 degrees C to investigate the effect of post-annealing. Mechanical properties were determined by hardness and tension tests; and microstructural changes were investigated by TEM analysis. Up to a critical level of plastic strain, remarkable improvements have been observed in the strength and hardness of the severely deformed strips; and the improvements have been explained by variations in grain size, dislocation structure, and formation of subgrains. (C) 2011 Elsevier Inc. All rights reserved.