铝含量对粉末冶金制备镁铝锆合金组织和力学性能的影响
Effect of Al Contents on Microstructure and Mechanical Properties of Mg-Al-Zr Alloys Prepared by Powder Metallurgy
摘 要
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79.7 HV和224 MPa, 但其塑性较差, 断口呈准解理断裂的特征。
粉末冶金
硬度
抗弯强度
Mg-Al-Zr alloy
powder metallurgy
hardness
bending strength
Abstract
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.
中图分类号 TH117.3
所属栏目 试验研究
基金项目 江苏省自然科学基金资助项目(BK2009577); 江苏省科技支撑计划项目(BE2010103)
收稿日期 2011/3/18
修改稿日期 2011/11/23
网络出版日期
作者单位点击查看
备注费飞(1987-), 男, 江苏淮安人, 硕士研究生。
引用该论文: FEI Fei,LIU Zi-li,LIU Bo-lu,JIANG Xiao-dong. Effect of Al Contents on Microstructure and Mechanical Properties of Mg-Al-Zr Alloys Prepared by Powder Metallurgy[J]. Materials for mechancial engineering, 2012, 36(3): 31～34
费飞,刘子利,刘伯路,蒋晓冬. 铝含量对粉末冶金制备镁铝锆合金组织和力学性能的影响[J]. 机械工程材料, 2012, 36(3): 31～34
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参考文献
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【2】ELSAYED A, UMEDA J, KONDOH K. 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,2011,59(1):273-282.
【3】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(3):189-192.
【4】阮爱杰,马立群,卞亚娟,等.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,2010,34(7):62-65.
【5】SHENG S D, CHEN D, CHEN Z H. Effects of Si addition on microstructure and mechanical properties of RS/PM (rapid solidification and powder metallurgy) AZ91 alloy[J].Journal of Alloys and Compounds,2009,470(1/2):17-20.
【6】YANG Z R, WANG S Q, AGO M J, et al. A new-developed magnesium matrix composite by reactive sintering[J].Composites, Part A: Applied Science and Manufacturing,2008,39(9):1427-1432.
【7】沈平. Mg-Zr基阻尼镁合金的制备及其性能研究[D].南京:南京航空航天大学,2009.
【8】ZHENG K Y, DONG J, ZENG X Q, et al. Effect of pre-deformation on aging characteristics and mechanical properties of Mg-Gd-Nd-Zr alloy[J].Transactions of Nonferrous Metals Society of China,2007,17(6):1164-1168.
【9】KNIPLING K E, DUNAND D C, SEIDMAN D N. Precipitation evolution in Al-Zr and Al-Zr-Ti alloys during aging at 450-600 ℃[J].Acta Materialia,2008,56(6):1182-1195.
【10】BETTLES C J, LAPOVOK R. A Mg-Al-Nd alloy produced via a powder metallurgical route[J].Materials Science and Engineering A,2009,55(1/2):26-31.
【11】XI Y L, CHAI D L, ZHANG W X, et al. Ti-6Al-4V particle reinforced magnesium matrix composite by powder metallurgy[J].Materials Letters,2005,59(14/15):1831-1835.
【12】LU L, LAI M O, FROYEN L. Effects of mechanical milling on the properties of Mg-10.3% Ti and Mg-5% Al-10.3% Ti metal-metal composite[J].Journal of Alloys and Compounds,2005,387(1/2):260-264.
【13】HAYASH K, KAWAMURA Y. Structure and mechanical properties of rapidly solidified Mg-X alloys[J].Materials Science Forum,2000,350/351(117):117-122.
【14】KIM B. In situ fracture observation and fracture toughness analysis of squeeze cast AZ51-xSn magnesium alloys[J].Materials Science and Engineering A,2010,527(24/25):6745-6757.
【15】LU Y Z, WANG Q D, DING W J, et al. Fracture behavior of AZ91 magnesium alloy[J].Materials Letters,2000,44(5):265-268.
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