METHOD FOR PRODUCING MAGNESIUM ALLOY PLATE MATERIAL, METHOD FOR PRODUCING MAGNESIUM ALLOY SHAPED MATERIAL, MAGNESIUM ALLOY PLATE MATERIAL AND MAGNESIUM ALLOY SHAPED MATERIAL

摘要

This method for producing a magnesium alloy plate material comprises: a step for preparing an alloy melt which contains from 0.01 atom% to 10 atom% (inclusive) of yttrium and from 0.01 atom% to 10 atom% (inclusive) of zinc, with the balance being made up of magnesium, and which satisfies the relational expression 2/3C_Z C_Yn C_Zn + 4, where C_Y (atom%) is the content of the yttrium and C_Zn (atom%) is the content of the zinc; and a step for producing a magnesium alloy plate material from the alloy melt by a twin roll casting method at a cooling rate of from 600°C/second to 2,500°C/second (inclusive).