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, cilt.62, sa.4, ss.391-397, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 62 Sayı: 4
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.matchar.2011.01.016
  • Dergi Adı: MATERIALS CHARACTERIZATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.391-397
  • Anahtar Kelimeler: Severe plastic deformation, DCAP, Transmission electron microscopy, 6061 Al-alloy, Strip, BEHAVIOR, TEXTURES, METALS
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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.