Tensile behavior of Al−4%Mg−0.4%Sc−0.5% misch metal alloy at room temperature

Abstract

The effects of strain rate and pre-deformation in Al−4 wt.%Mg−0.4 wt.%Sc−0.5 wt.%Mm (misch metal) alloy on tensile behavior and P-L effect have been investigated. Pre-deformation of Al−4 wt.%Mg−0.4 wt.%Sc−0.5 wt.%Mm alloy clearly enhances the yield strength and ultimate strength, though it decreases the fracture strain. The yield strength of pre-deformed Al−4 wt.%Mg−0.4 wt.%Sc−0.5 wt.%Mm alloy is higher than that of commercially used Al−Mg based alloys. The strength of Al−4 wt.%Mg−0.5 wt.%Sc−0.5 wt.%Mm alloy was changed slightly at a strain rate between 2×10−5s−1 and 2×10−3s−1, but changed significantly when predeformation was introduced. Tensile test results of as-cast Al-4 wt.%Mg-0.4 wt.%Sc-0.5 wt.%Mm alloy show a significant oscillation of serration during deformation at room temperature, and the critical strain (ε c ), which is the strain at the start of serration, decreases with increasing strain rate. Pre-deformation of Al−4wt%Mg−0.4wt%Sc−0.5wt%Mm also affects the serration oscillation: it decreases the critical strain at lower strain rate and increases it at higher strain rate (>2×10−4s−1).

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Correspondence to Kee-Do Woo.

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Woo, KD., Kim, SW. Tensile behavior of Al−4%Mg−0.4%Sc−0.5% misch metal alloy at room temperature. Met. Mater. Int. 11, 95 (2005). https://doi.org/10.1007/BF03027452

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Keywords

  • tensile behavior
  • P-L effect
  • Al−Mg−Sc−Mm alloy
  • deformation