Alminum alloy energy-absorbing member

Abstract

An aluminum alloy energy-absorbing member, which satisfies the conditions of α≧24 and (α×σ)≧6000, wherein α (%) is the rupture elongation at a gauge distance of 5 mm, and σ (MPa) is a 0.2% proof stress value, in the extruding direction of an aluminum alloy extruded material. This is an aluminum alloy energy-absorbing member that is lightweight, high in energy absorption, adequate in required mechanical strength, and preferable as an impact-absorbing member for an automobile, and the like.

What is claimed is:  
     
         1 . An aluminum alloy energy-absorbing member, satisfying the conditions of α≧24 and (α×σ)≧6000, wherein α (%) is the rupture elongation at a gauge distance of 5 mm, and σ (MPa) is a 0.2% proof stress value, in the extruding direction of an aluminum alloy extruded material.  
     
     
         2 . The aluminum alloy energy-absorbing member as claimed in    claim 1   , wherein the aluminum alloy is an Al—Mg—Si alloy or an Al—Zn—Mg alloy.  
     
     
         3 . The aluminum alloy energy-absorbing member as claimed in    claim 1   , which is used as a frame material for a side member, or a bumper beam material.