High strength Mg97Y2Zn1alloy processed by extrusion and equal channel angular pressing

作者：Chen, Bin^*; Lin, Dong Liang; Zeng, Xiao Qin; Lu, Chen; Peng, Ying Hong

来源：Chinese Journal of Nonferrous Metals, 2010, 20(4): 613-619.

• As-cast
• Average grain size
• High strength
• Mg97Y2Zn1
• Stacking structures
• Ultimate tensile strength
• Ultra fine grain

The high strength Mg97Y2Zn1 alloy processed by extrusion and equal channel angular pressing was investigated. The results show that after extrusion, the processed Mg97Y2Zn1 alloy obtains ultrafine grains with average grain size of 0.5-2.0 μm, and exhibits excellent mechanical properties with yield strength, ultimate tensile strength and elongation of alloy of 352 MPa, 413 MPa and 10%, respectively. After extrusion and equal channel angular pressing, the average grain size is 300-400 nm, the yield strength and ultimate tensile strength of the alloy are 400 MPa and 450 MPa, respectively. The long-period stacking lamellar structure is observed in the as-cast, extruded and ECAP processed Mg97Y2Zn1 alloy, the formation of which is due to the solid solution of Y and Zn. The excellent mechanical properties of Mg97Y2Zn1 alloy are attributed to the grain refinement and the long-period stacking structure.

• 出版日期2010
• 单位上海交通大学