2744 AZ31およびAZX311引抜き材の室温変形に伴うミクロ組織および集合組織の変化(S29-1 アルミニウム合金およびマグネシウム合金の創製と加工技術(1),S29 アルミニウム合金およびマグネシウム合金の創製と加工技術)

Abstract

Tensile properties and microstructural evolution of drawn AZ-31 and AZX311 alloy wires during tensile and twist deformation were investigated at room temperature. Furthermore, microstructure changes of annealed pipes with bending deformation was also examined at room temperature. An addition of 0.88% Ca to AZ31 alloy enhances grain refining effect by finely-dispersed Al-Ca compound, and prevent grain coarsening during annealing. As a result AZX311 exhibits higher tensile strength and proof stress by about 20% than AZ-31 alloy and has high elongation even after the high temperature annealing. It is possible to bend at the minimum radius of 2.7D in AZ31 alloy pipe annealed at 3009C. At the inside of the bent area texture of basal plane rotates by about 90℃along the drawn direction due to occurrence of tensile twin, but the texture at the outside unchanges.