The influence of pure Na on the microstructure and tensile properties of Al-Mg2Si metal matrix composite

被引：84
作者：
Emamy, M. [1 ]
Khorshidi, R. [2 ]
Raouf, A. Honarbakhsh [2 ]
机构：
[1] Univ Tehran, Sch Met & Mat, Tehran 113654563, Iran
[2] Semnan Univ, Fac Engn, Dept Mat, Semnan, Iran
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 13-14期
关键词：
Mechanical characterization; Al/Mg2Si composites; Casting; Fracture; GROWTH; SILICON; MG2SI;
D O I：
10.1016/j.msea.2011.02.010
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In current research, the influence of different concentrations of Na (0.01-0.2 wt.%) on the microstructure and tensile properties of Al-15 wt.%Mg2Si in situ metal matrix composite has been investigated. It was found that 0.1 wt.% Na addition changes the morphology of primary Mg2Si irregular or dendritic to polyhedral shape and its average particle size decreases from 32 mu m to 7 mu m. Microstructural studies also showed that the morphology of the eutectic Mg2Si phase alters from flake-like to very short fibrous or dot-like. Further investigations on tensile tests revealed optimum Na level (0.1%) for improving both UTS and elongation values. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：4337 / 4342
页数：6
相关论文
共 18 条
  • [1] On the competition between particle fracture and particle decohesion in metal matrix composites
    Babout, L
    Brechet, Y
    Maire, E
    Fougères, R
    [J]. ACTA MATERIALIA, 2004, 52 (15) : 4517 - 4525
  • [2] Chang J.Y., 1998, SCRIPTA MATER, V39, P307
  • [3] Chawla N, 2001, ADV ENG MATER, V3, P357, DOI 10.1002/1527-2648(200106)3:6<357::AID-ADEM357>3.0.CO
  • [4] 2-I
  • [5] Hadian R., 2008, MAT SCI ENG A-STRUCT, V490
  • [6] Effects of strontium on the structure and properties of aluminium-silicon alloys
    Haque, MM
    [J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1995, 55 (3-4) : 193 - 198
  • [7] Restraining effect of strontium on the crystallization of Mg2Si phase during solidification in Al-Si-Mg casting alloys and mechanisms
    Liao, HC
    Sun, Y
    Sun, GX
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 358 (1-2): : 164 - 170
  • [8] GROWTH MECHANISMS OF SILICON IN AL-SI ALLOYS
    LU, SZ
    HELLAWELL, A
    [J]. JOURNAL OF CRYSTAL GROWTH, 1985, 73 (02) : 316 - 328
  • [9] Nonfaceted growth of intermetallic Mg2Si in Al melt during rapid solidification
    Qin, Q. D.
    Zhao, Y. G.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 462 (1-2) : L28 - L31
  • [10] Strontium modification and formation of cubic primary Mg2Si crystals in Mg2Si/Al composite
    Qin, Q. D.
    Zhao, Y. G.
    Liu, C.
    Cong, P. J.
    Zhou, W.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 454 (1-2) : 142 - 146
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