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研究挤压态Mg-2Dy-0.5Zn(摩尔分数,%)合金板材的压缩各向异性。合金主要由α-Mg、(Mg,Zn)xDy相和大量沿挤压方向分布的长周期有序堆垛(LPSO)结构相组成。压缩实验测试结果表明,合金呈明显的压缩各向异性。平行于挤压方向(ED)合金试样的压缩强度显著高于板材横向(TD)及与挤压方向成45°角的合金试样的压缩强度。ED方向合金试样的压缩屈服强度(CYS)、最大压缩强度(UCS)和压缩应变分别为274.65 MPa,518.94 MPa和12.93%。合金压缩各向异性主要与LPSO相的分布以及变形晶粒中<1 010>//ED类型织构的形成有关。
The compression anisotropy of extruded Mg-2Dy-0.5Zn (mol fraction,%) alloy sheet was studied. The alloy is mainly composed of α-Mg, (Mg, Zn) x Dy phases and a large number of LPSO structural phases distributed along the extrusion direction. Compression test results show that the alloy was obviously compressive anisotropy. The compressive strength of the specimens parallel to the direction of extrusion (ED) was significantly higher than the compressive strength of the alloy specimens in the transverse direction of the sheet (TD) and at an angle of 45 ° to the direction of extrusion. The compressive yield strength (CYS), maximum compressive strength (UCS) and compressive strain of ED alloy specimens were 274.65 MPa, 518.94 MPa and 12.93%, respectively. The compressive anisotropy of alloy is mainly related to the distribution of LPSO phase and the formation of <1 010> // ED type texture in deformed grains.