TENSILE BEHAVIOR OF Al-Mg ALLOY SHEET AT WIDE RANGE OF STRAIN RATE AT VARIOUS TEMPERATURES

Naka, Tetsuo; Yoshida, Fusahito

doi:10.1016/b978-0-08-042824-6.50069-6

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2004

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“…Apparently they decrease the quality of products, and furthermore, they may lead to strain localization and fracture. Hot/warm forming of the sheets would be one of the best forming technologies to overcome such problems [6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Strain-Rate and Temperature on Yield Locus for 5083 Aluminum Alloy Sheet

Naka

Nakayama

Uemori

et al. 2004

KEM

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To determine yield locus of type 5083 aluminum-magnesium sheet at elevated temperature, biaxial tensile experiments were performed, using cruciform specimens, at various temperatures (25 -300 ℃) at strain rates raging from 10 -5 to 10 -2 s -1 . From the experimental results, the effects of strain rate and temperature on the yield locus are discussed. The size of yield locus drastically decreased with increasing temperature and with decreasing strain rate. Neither von Mises' yield criterion or Hill's can well predict the shape of yield locus of this type of sheet metal. In contrast, the yield criterion of Logan-Hosford or Barlat well simulate the yield locus at elevated temperatures.

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