A high-strength and high-toughness magnesium alloy includes a Mg—Al—Bi—Sb—Zn—Sr—Y—Mn alloy, prepared from the following components in percentage by mass: 7.0 to 10.0% of Al, 0.2 to 2.0% of Bi, 0.2 to 0.8% of Sb, 0.2 to 0.5% of Zn, 0.1 to 0.5% of Sr, 0.03 to 0.3% of Y, 0.05 to 0.1% of Mn and a balance of Mg.

A plastic wrought magnesium alloy includes a Mg—Al—Bi—Sn—Ca—Y alloy, prepared from the following chemical components in percentage by mass: 3 to 6.0% of Al, 1 to 3.0% of Bi, 0.5 to 2.0% of Sn, 0.02 to 0.05% of Ca, 0.02 to 0.05% of Y and the balance of Mg, in which the percentage sum of Ca and Y elements is more than 0.05% and less than 0.1%.

A plastic wrought magnesium alloy includes a Mg—Al—Bi—Sn—Ca—Y alloy, prepared from the following chemical components in percentage by mass: 3 to 6.0% of Al, 1 to 3.0% of Bi, 0.5 to 2.0% of Sn, 0.02 to 0.05% of Ca, 0.02 to 0.05% of Y and the balance of Mg, in which the percentage sum of Ca and Y elements is more than 0.05% and less than 0.1%.

A method of forming a part from sheet metal and a part formed by said method. The method comprising the steps of: (a) heating a metal sheet to a temperature T; and (b) forming the sheet into the part between dies while applying cooling means to the sheet, where in step a) the metal sheet is heated at a rate of at least 50° C..Math.s.sup.−1, and temperature T is above a critical forming temperature and does not exceed a critical microstructure change temperature of said metal sheet.

A Mg—Li—Al—Zn alloy is disclosed. The Mg—Li—Al—Zn alloy comprises, in weight percent: 5-15% Li, 1.5-9.0% Al, 0.5-1.5% Zn, 0.4-1.3% Y, 0.18-1.01% Nd, 0.09-0.65% Ce, and the balance Mg and incidental impurities. Experimental data have proved that, this novel Mg—Li—Al—Zn alloy has a flashover temperature in a range between 620° C. and 700° C., such that the flashover temperature of the specifically-designed Mg—Li—Al—Zn alloy is greater than that of commercial LAZ521, LAZ721, LAZ771, LAZ921, and LAZ1491 alloys. Therefore, the Mg—Li—Al—Zn alloy of the present invention can be processed to be a structural article through air melt and casting process.

A Mg—Li—Al—Zn alloy is disclosed. The Mg—Li—Al—Zn alloy comprises, in weight percent: 5-15% Li, 1.5-9.0% Al, 0.5-1.5% Zn, 0.4-1.3% Y, 0.18-1.01% Nd, 0.09-0.65% Ce, and the balance Mg and incidental impurities. Experimental data have proved that, this novel Mg—Li—Al—Zn alloy has a flashover temperature in a range between 620° C. and 700° C., such that the flashover temperature of the specifically-designed Mg—Li—Al—Zn alloy is greater than that of commercial LAZ521, LAZ721, LAZ771, LAZ921, and LAZ1491 alloys. Therefore, the Mg—Li—Al—Zn alloy of the present invention can be processed to be a structural article through air melt and casting process.

A method to form a magnesium article includes: heating materials including magnesium, aluminum, manganese and tin in a furnace to create an alloy having a composition of; the magnesium in an amount greater than or equal to 90% by weight of the materials; the aluminum ranging between approximately 2.0% up to approximately 4.0% by weight of the materials; the manganese ranging between approximately 0.43% up to approximately 0.6% by weight of the materials; and the tin ranging between approximately 1% up to approximately 3% by weight of the materials; chill casting the alloy to create a cast billet; and heating the cast billet at a temperature ranging from approximately 380° C. up to approximately 420° C. and maintaining the temperature for a time period between approximately 4 hours to 10 hours to homogenize element distribution.

A method to form a magnesium article includes: heating materials including magnesium, aluminum, manganese and tin in a furnace to create an alloy having a composition of; the magnesium in an amount greater than or equal to 90% by weight of the materials; the aluminum ranging between approximately 2.0% up to approximately 4.0% by weight of the materials; the manganese ranging between approximately 0.43% up to approximately 0.6% by weight of the materials; and the tin ranging between approximately 1% up to approximately 3% by weight of the materials; chill casting the alloy to create a cast billet; and heating the cast billet at a temperature ranging from approximately 380° C. up to approximately 420° C. and maintaining the temperature for a time period between approximately 4 hours to 10 hours to homogenize element distribution.

A magnesium alloy including about 2 percent by weight to about 8 percent by weight zinc, about 0.1 percent by weight to about 3 percent by weight manganese, about 1 percent by weight to about 6 percent by weight tin, about 0.1 percent by weight to about 4 percent by weight yttrium, and balance magnesium and impurities.

A magnesium alloy including about 2 percent by weight to about 8 percent by weight zinc, about 0.1 percent by weight to about 3 percent by weight manganese, about 1 percent by weight to about 6 percent by weight tin, about 0.1 percent by weight to about 4 percent by weight yttrium, and balance magnesium and impurities.