Magnesium alloy sheet material
AssigneesNational University Corporation Kumamoto University, Kumamoto Technology & Industry Foundation, Nissan Motor Co., Ltd.
InventorsYoshihito KAWAMURA, Masafumi NODA, Hiroshi SAKURAI
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Abstract
Disclosed is a magnesium alloy material having excellent tensile strength and favorable ductility. Therefore, the magnesium alloy sheet material formed by rolling a magnesium alloy having a long period stacking order phase crystallized at the time of casting includes in a case where a sheet-thickness traverse section of an alloy structure is observed at a substantially right angle to the longitudinal direction by a scanning electron microscope, a structure mainly composed of the long period stacking order phase, in which, at least two or more αMg phases having thickness in the observed section of 0.5 μm or less are laminated in a layered manner with the sheet-shape long period stacking order phase.
Claims9
A manufacturing method of a magnesium alloy sheet material comprising the steps of:
- forming a cast material having a long period stacking order phase crystallized by casting a dissolved magnesium alloy;
- forming a magnesium alloy sheet material by extruding said cast material,
- forming said long period stacking order phase in sheet shape by performing a heat treatment to said magnesium alloy sheet material;
- and
- rolling said magnesium alloy sheet material after said heat treatment, wherein
- said magnesium alloy sheet material after rolling comprises:
- in a case where a sheet-thickness traverse section of an alloy structure is observed at a substantially right angle to the longitudinal direction by a scanning electromicroscope,
- a structure mainly composed of said long period stacking order phase, in which at least two or more αMg phases having thickness in the observed section of 0.5 μm or less are laminated in a layered manner with said long period stacking order phase of the sheet shape.
Dependencies are inferred from the claim text.