Thickness dependent yielding behavior and formability of AA6082-T6 alloy: experimental observation and modeling


ÇAVUŞOĞLU O. , Surucu H. I. , Toros S., Alkan M.

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, cilt.106, ss.4083-4091, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 106
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s00170-019-04878-6
  • Dergi Adı: INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
  • Sayfa Sayıları: ss.4083-4091

Özet

This study analyzes thickness-dependent of the yielding behavior and forming limit diagrams (FLDs) of the AA6082-T6 aluminum alloy sheet. Mechanical behavior of the materials of 1 and 1.5 mm sheet thickness is observed having performed anisotropy and tensile tests at 0 degrees, 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, and 90 degrees to the rolling direction. By using Hill-48 and Barlat-89 yield criteria, r-value and yield stress relations were defined and yield loci were obtained. Forming limit diagrams were created using experimental data and Marciniak-Kuczynski (MK) model. It was observed that increased sheet thickness also increases anisotropy while decreasing yield stress; yield locus was found to be smaller. The formability of the material increased as the sheet thickness increases.