运用粉末冶金工艺制备了Mg-xAl-1.5Zr（x=0,2,4,6,8,质量分数/%）合金,研究了铝含量对其组织和力学性能的影响。结果表明：镁铝锆合金主要由α-Mg基体、锆颗粒、β-Mg17Al12相组成,还存在一些微小的孔洞;铝含量的增加使合金组织趋于均匀化;Mg-6Al-1.5Zr合金具有最高的硬度和抗弯强度,分别为79.7HV和224MPa,但其塑性较差,断口呈准解理断裂的特征。
Mg-xAl-1.5Zr alloys（x=0,2,4,6,8,mass fraction/%） were prepared by powder metallurgy technology.The effects of Al contents on microstructure and mechanical properties of the alloys were studied.The results show that Mg-Al-Zr alloys consisted of α-Mg matrix,Zr particles,β-Mg17Al12 phase and some microporosities.Increasing the Al content resulted in microstructure homogenizing of the alloys.Mg-6Al-1.5Zr had the highest microhardness and bending strength,up to 79.7 HV and 224 MPa,but its plasticity was poor,and the fracture showed a characteristic of quasi-cleavage fracture.
参考文献
| [1] | Elsayed Ayman;Umeda Junko;Kondoh Katsuyoshi .Application of rapid solidification powder metallurgy to the fabrication of high-strength, high-ductility Mg-Al-Zn-Ca-La alloy through hot extrusion[J].Acta materialia,2011(1):273-282. |
| [2] | 于旭光,邱竹贤.镁工业生产及应用的现状和展望[J].材料与冶金学报,2003(03):189-192. |
| [3] | 阮爱杰,马立群,卞亚娟,潘安霞,丁毅.SiCp增强镁-锌-锆合金基复合材料的阻尼性能[J].机械工程材料,2010(07):62-65. |
| [4] | Z.R. Yang;S.Q. Wang;M.J. Gao .A new-developed magnesium matrix composite by reactive sintering[J].Composites. Part A, Applied science and manufacturing,2008(9):1427-1432. |
| [5] | 沈平 .Mg-Zr基阻尼镁合金的制备及其性能研究[D].南京航空航天大学,2009. |
| [6] | ZHENG Kai-yun,DONG Jie,ZENG Xiao-qin,DING Wen-jiang.Effect of pre-deformation on aging characteristics and mechanical properties of Mg-Gd-Nd-Zr alloy[J].中国有色金属学会会刊（英文版）,2007(06):1164-1168. |
| [7] | C.J. Bettles;M.H. Moss;R. Lapovok .A Mg-Al-Nd alloy produced via a powder metallurgical route[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2009(1/2):26-31. |
| [8] | Hayashi K.;Kawamura Y. .Structure and Mechanical Properties of Rapidly Solidified Mg-X Alloys[J].Materials Science Forum,2000(0):117-122. |
| [9] | Kim, B.;Do, J.;Lee, S.;Park, I. .In situ fracture observation and fracture toughness analysis of squeeze cast AZ51-xSn magnesium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(24/25):6745-6757. |
| [10] | Wang Q.D.;Ding W.J. .Fracture behavior of AZ91 magnesium alloy[J].Materials Letters,2000(5):265-268. |
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