Compressive anisotropy of extruded Mg-Dy-Zn alloy sheet
(1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,
Lanzhou University of Technology, Lanzhou 730050, China;
2. Key Laboratory of Nonferrous Metal alloys and Processing, Ministry of Education,
Lanzhou University of Technology, Lanzhou 730050, China;
3. School of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China)
Lanzhou University of Technology, Lanzhou 730050, China;
2. Key Laboratory of Nonferrous Metal alloys and Processing, Ministry of Education,
Lanzhou University of Technology, Lanzhou 730050, China;
3. School of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China)
Abstract: Compressive anisotropy of extruded Mg-2Dy-0.5Zn (mole fraction, %) alloy sheet was investigated. The alloy sheet was mainly composed of α-Mg, (Mg, Zn)xDy phase and a large number of long period stacking ordered (LPSO) phases distributed along the extrusion direction. The compressive experimental results show that the alloy sheet exhibits an obvious compressive anisotropy. The compressive strength of the specimen in the extrusion direction (ED) is higher than those of the specimens in the transverse direction (TD) and 45° inclined to the extrusion direction. The compressive yield strength (CYS), ultimate compressive strength (UCS) and compressive strain of the specimen in the ED are 274.65 MPa, 518.94 MPa and 12.93%, respectively. The compressive anisotropy is mainly attributed to the distribution of LPSO phase and formation of fiber texture in the deformed grains.
Key words: Mg-Dy-Zn alloy; microstructure; texture; LPSO phase; compressive anisotropy