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Microstructure and mechanical properties of as-cast Mg-Li-Al-xSi alloys
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College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,College of Materials Science and Engineering,Chongqing University,

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    Abstract:

    The as-cast Mg-9Li-3Al-xSi(x=0,0.1,0.5,1.0 wt%)alloys were prepared in a vacuum induction furnace with the protection of argon. The alloys were then investigated by OM,SEM,XRD and mechanical properties test. Results exhibit that the as-cast Mg-9Li-3Al-xSi alloys are consist of α-Mg, β-Li, Mg17Al12 and phase. The addition of Si leads to the formation of new phase (Mg2Si) and the refinement of the grain. But if the content of Si is too high, α-Mg phase will coarsened, there are block and Chinese character shaped Mg2Si phase existing in the phase boundary. The temsile strength of alloys initially enhance and then decrease while the elongation declines with the increase of Si content. When Si addition is 0.1wt%, the tensile strength of the alloy comes to the maximum of 182.5Mpa, enhanced by 59.6% compared to the Mg-9Li-3Al alloy, while the elongation is 12.1%.

    Reference
    1Wang J, Liu R D, Luo T J et al. A high strength and ductility Mg-Zn-Al-Cu-Mn magnesium alloy [J]. Materials Design, 2013, 47: 746
    2Peng Xiaodong, Li Junchen, Li Wenjuan. Effect of Y on Microstructure and Mechanical Properties as well as Corrosion Resistance of Mg-9Li-3Al Alloy[J]. Rare Metal Materials and Engineering, 2013, 42: 1993
    3Xu T C, Peng X D, Jiang J W et al. Effect of Sr content on microstructure and mechanical properties of Mg-Li-Al-Mn alloy[J]. Transaction of Nonferrous Metals Society of China, 2014, 24: 2752
    4Vinod Kumar, Govind,SRajiv Shekhar, et al. Microstructure evolution and texture development in thermomechanically processed Mg-Li-Al based alloys[J]. Materials Science and Engineering: A. 2012, 547: 38
    5Wu Rui-zhi, Qu Zhi-kun, Zhang Mi-lin. Effects of the addition of Y in Mg-8Li-( 1, 3) Al alloy[J]. Materials Science and Engineering A, 2009, 516 : 96
    6Song P W. The effect of Solution treatment on microstructure and properties of Mg-4Al-2Si alloy[J].Special casting nonferrous alloys. 2011, 31: 311(in chinese)
    7S. Golmakaniyoon, R. Mahmudi. Microstructure and creep behavior of the rare-earth doped Mg-6Zn-3Cu cast alloy [J]. Materials Science and Engineering: A, 2011, 528: 1668
    8Yang Y, Peng X D, Wen H M et al. Influence of extrusion on the microstructure and mechanical behavior of Mg-9Li-3Al-xSr alloys[J]. Metallurgical and Materials Transactions A, 2013, 44: 1101
    9Zhang M X, Kelly P M, Easton M A et al. Crystallographic study of grain refinement in aluminum alloys using the edge-to-edge matching model [J]. Acta Materialia, 2005, 53: 1427
    10Zhang M X, Kelly P M, Qian M et al. Crystallography of grain refinement in Mg-Al based alloys [J]. Acta Materialia, 2005, 53(11): 3261
    11A. A. Luo. Recent magnesium alloy development for elevated temperature applications[J]. International Materials Reviews,2004,49: 13
    12Q.C. Jiang, H.Y. Wang,SY. Wang et al. Modification of Mg2Si in Mg-Si alloys with yttrium[J]. Materials Science and Engineering: A, 2005,392 : 130
    13M. Mabuchi,SK. Higashi. Strengthening mechanisms of Mg2Si alloys[J]. Acta Materialia,1996,44: 4611
    14K. Chen,SZ.Q. Li,SJ.S. Liu et al. The effect of Ba addition on microstructure of in situ synthesized Mg2Si/Mg-Zn-Si composites[J].Journal of Alloys and Compounds, 2009,487): 293.
    15Y.Z. Lu, Q.D. Wang,SX.Q. Zeng,Set al. Behavior of Mg-6Al-xSi alloys during solution heat treatment at 420°C [J]. Materials Science and Engineering: A. 2001, 301: 257.
    16Zhang Jinghuai, Niu Xiaodong, Qiu Xin et al. Effect of yttrium-rich misch metal on the microstructures, mechanical properties and corrosion behavior of die cast AZ91 alloy[J]. Journal of Alloys and Compounds, 2009, 471( 5) : 326
    17Zhang C X, Guan S K, Chen H J et al. Effect of Si content on microstructure and mechanical properties of Mg-8Zn-4Al-0.3Mn alloy[J]. 2004, 28: 21(in chinese)
    18Mengqi Cong,SZiquan Li,SJinsong Liu et al. Effect of Ca on the microstructure and tensile properties of Mg-Zn-Si alloys at ambient and elevated temperature[J]. Journal of Alloys and Compounds, 2012,539: 16
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[Zhang Zhenyu, Peng Xiaodong, Yan Lei, Li Yangmin, Liu Junwei, Li Mengluan, yangyan. Microstructure and mechanical properties of as-cast Mg-Li-Al-xSi alloys[J]. Rare Metal Materials and Engineering,2017,46(8):2055~2059.]
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History
  • Received:June 18,2015
  • Revised:September 15,2015
  • Adopted:October 13,2015
  • Online: November 16,2017