Rolled magnesium alloy material, magnesium alloy structural member, and method for producing rolled magnesium alloy material

  • US 9,598,749 B2
  • Filed: 02/13/2012
  • Issued: 03/21/2017
  • Est. Priority Date: 02/14/2011
  • Status: Active Grant
First Claim
Patent Images

1. A rolled magnesium alloy material produced by rolling a magnesium alloy material with a reduction roll,wherein the magnesium alloy material contains aluminum in an amount of 8.3% by mass or more and 12% by mass or less,wherein, in a width direction of the rolled magnesium alloy material,a ratio OE/OC of a basal plane peak ratio of an edge portion to a basal plane peak ratio of a central portion satisfies OE/OC<

  • 0.89,where the basal plane peak ratio OC of the central portion and the basal plane peak ratio OE of the edge portion are represented by formulae below;


    basal plane peak ratio OC;

    I
    C(002)/{IC(100)+IC(002)+IC(101)+IC(102)+IC(110)+IC(103)}
    basal plane peak ratio OE;

    I
    E(002)/{IE(100)+IE(002)+IE(101)+IE(102)+IE(110)+IE(103)} 

    where IC(002), IC(100), IC(101), IC(102), IC(110), and IC(103) respectively represent X-ray diffraction peak intensities of a (002) plane, a (100) plane, a (101) plane, a (102) plane, a (110) plane, and a (103) plane in the central portion, andIE(002), IE(100), IE(101), IE(102), IE(110), and IE(103) respectively represent X-ray diffraction peak intensities of the (002) plane, the (100) plane, the (101) plane, the (102) plane, the (110) plane, and the (103) plane in the edge portion,wherein a thickness ratio tE/tC satisfies 0.97≦

    tE/tC

    1.03 where tC denotes a thickness of a central portion in the width direction of the rolled Mg alloy material and tE denotes a thickness of an edge portion in the width direction of the rolled Mg alloy material,wherein an elongation ratio EE/EC of the edge portion to the central portion satisfies 3/2<

    EE/EC, where EC denotes an elongation of the central portion in a tensile test in a rolling direction and EE denotes an elongation of the edge portion in a tensile test in a rolling direction.

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