Impact toughness and fractography of Al-Si-Cu-Mg base alloys

被引：45
|
作者：
Ibrahim, M. F. [1 ]
Samuel, E. [1 ]
Samuel, A. M. [1 ]
Al-Ahmari, A. M. A. [2 ,3 ]
Samuel, F. H. [1 ,2 ,3 ]
机构：
[1] Univ Quebec, Dept Sci Appl, Chicoutimi, PQ G7H 2B1, Canada
[2] King Saud Univ, Ctr Excellence Res Engn Mat, Coll Engn, Riyadh 11421, Saudi Arabia
[3] King Saud Univ, FARCAMT, Coll Engn, Riyadh 11421, Saudi Arabia
来源：
MATERIALS & DESIGN | 2011年 / 32卷 / 07期
关键词：
Non-ferrous metals and alloys; Mechanical; Fractography; FRACTURE CHARACTERISTICS; BEHAVIOR; TENSILE;
D O I：
10.1016/j.matdes.2011.02.058
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Critical automotive applications using heat-treatable alloys are designed for high impact toughness which can be improved using a specified heat treatment. The alloy toughness and fracture behavior are influenced by the alloy composition and the solidification conditions applied. The mechanical properties of alloys containing Cu and Mg can also be enhanced through heat treatment. The present study was undertaken to investigate the effects of Mg content, aging and cooling rate on the impact toughness and fractography of both non-modified and Sr-modified Al-Si-Cu-Mg base alloys. Castings were prepared from both experimental and industrial 319 alloy melts containing 0-0.6wt% Mg. Test bars were cast in two different cooling rate molds, a star-like permanent mold and an L-shaped permanent mold, with dendrite arm spacing (DAS) values of 24 and 50 mu m, respectively. Test bars were aged at 180 degrees C and 220 degrees C for 2-48 h. Charpy Impact test was used to provide the impact energy. It was observed that high cooling rates improve the impact toughness whereas the presence of Cu significantly lowers the impact properties which are determined mainly by the Al(2)Cu phase and not by the eutectic Si particles. The addition of Mg and Sr were also seen to decrease the impact toughness. The crack initiation energy in these alloys is greater than the crack propagation energy, reflecting the high ductility of Al-Si-Cu-Mg base alloys. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3900 / 3910
页数：11
相关论文
共 50 条
  • [31] Influence of Cu and minor elements on solution treatment of Al-Si-Cu-Mg cast alloys
    Wang, GQ
    Bian, XF
    Wang, WM
    Zhang, JY
    MATERIALS LETTERS, 2003, 57 (24-25) : 4083 - 4087
  • [32] Influence of Cu content on microstructure and mechanical properties of thixoformed Al-Si-Cu-Mg alloys
    Salleh, M. S.
    Omar, M. Z.
    TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2015, 25 (11) : 3523 - 3538
  • [33] Fractal and Conventional Analysis of Cu Content Effect on the Microstructure of Al-Si-Cu-Mg Alloys
    Casas, Bertha Y.
    Carranza, Juan C.
    Figueroa, Ignacio A.
    Gonzalez, Jose G.
    Hernancdez, Orlando
    Bejar, Luis
    Aguilar, Claudio
    Alfonso, Ismeli
    MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, 2020, 23 (04):
  • [34] EFFECT OF MG AND ZN CONTENTS ON THE MICROSTRUCTURES AND MECHANICAL PROPERTIES OF AL-SI-CU-MG ALLOYS
    Nemri, Y.
    Chiker, N.
    Gueddouar, B.
    Benamar, M. E. A.
    Sahraoui, T.
    Hadji, M.
    INTERNATIONAL JOURNAL OF METALCASTING, 2018, 12 (01) : 20 - 27
  • [35] Influence of Tin Addition on the Microstructure and Mechanical Properties of Al-Si-Cu-Mg and Al-Si-Mg Casting Alloys
    A.M.A. Mohamed
    F.H. Samuel
    A.M. Samuel
    H.W. Doty
    S. Valtierra
    Metallurgical and Materials Transactions A, 2008, 39 : 490 - 501
  • [36] Effect of Intermetallics and Tramp Elements on Porosity Formation and Hardness of Al-Si-Mg and Al-Si-Cu-Mg Alloys
    Mohamed, A. M. A.
    Samuel, E.
    Samuel, A. M.
    Samuel, F. H.
    Songmene, V
    Doty, H. W.
    INTERNATIONAL JOURNAL OF METALCASTING, 2023, 17 (02) : 664 - 681
  • [37] Influence of tin addition on the microstructure and mechanical properties of Al-Si-Cu-Mg and Al-Si-Mg casting alloys
    Mohamed, A. M. A.
    Samuel, F. H.
    Samuel, A. M.
    Doty, H. W.
    Valtierra, S.
    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2008, 39A (03): : 490 - 501
  • [38] Structure, property, processing relations in cast, solutionized, and aged Al-Si-Cu-Mg and Al-Si-Mg alloys
    Fang, Jian
    Ma, Yong
    Brody, Harold D.
    SHAPE CASTING: 2ND INTERNATIONAL SYMPOSIUM, 2007, : 175 - +
  • [39] High-Temperature Tensile Fractography of Zr-, Ni-, and Mn-Containing Al-Si-Cu-Mg Cast Alloys
    Abdelaziz, M. H.
    Elgallad, E. M.
    Samuel, A. M.
    Doty, H. W.
    Samuel, F. H.
    ADVANCES IN MATERIALS SCIENCE AND ENGINEERING, 2020, 2020
  • [40] Toughness and fatigue behaviour of eutectic and hypereutectic Al-Si-Cu-Mg alloys produced through lost foam and squeeze casting
    Lasa, L
    Rodriguez-Ibabe, JM
    MATERIALS SCIENCE AND TECHNOLOGY, 2004, 20 (12) : 1599 - 1608
12345