Patent ID: 8394211

Claim:
A method for manufacturing a magnesium alloy material, which comprises: forming a cast material by casting an Mg—Zn—RE alloy consisting essentially of 0.5 to 3 at. % of Zn as an essential component, 1 to 5 at. % of a total amount of an RE selected from the group consisting of Gd, Tb, Tm and mixtures thereof as RE, and the rest including Mg and unavoidable impurities; solubilizing the cast material; and heat treating the solubilized cast material under conditions satisfying −18[ln(x)]+240<y<−12[ln(x)]+375 and 2<x<300, wherein y denotes the heat treatment temperature (° C.) and x denotes the heat treatment time (hr), to form a lengthy precipitate having a length of 0.1 to 20 μm and at least one phase state selected from the group consisting of a β-phase, a β′-phase, and a β1-phase.