Abstract
The purpose of this study is to investigate the influence of samarium addition on the microstructures and mechanical properties of Al-5Cu alloys. The microstructures were examined by optical microscopy, X-ray diffraction, scanning electron microscopy, energy diffraction spectroscopy and differential thermal analysis. It was found that Sm was capable significantly of affecting the microstructures of Al-5Cu alloys. When 0.4 wt% Sm was added into the alloy, the aspect ratio and the mean area of Al2Cu phase were 10.9 and 61.0 μm2. They were decreased by 31.5% and 43.3% when compared with unmodified alloy. Meanwhile, a kind of nano size strengthening Al2Sm phase was formed in Al-5Cu alloys. In addition, the differential thermal analysis results showed that Sm addition results in a decrease in the melting temperature of α-Al and Al2Cu. And a good combination of yield strength (244.5 MPa), ultimate tensile strength (269.4 MPa) and elongation (6.9%) was obtained when the Sm addition was 0.4 wt%. Compared with unmodified Al-5Cu alloys, they were increased by 37.6%, 35.2% and 21.1%, respectively.
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Li H Z, Liang X P, Li F G, et al. Effect of Y Content on Microstructure and Mechanical Properties of 2519 Aluminum Alloy[J]. Transactions of Nonferrous Metals, 2007, 17(6): 1194–1198
Pandeya S C, Josepha M A, Pradeep M S, et al. A Theoretical and Experimental Evaluation of Repetitive Corrugation and Straightening: Application to Al-Cu and Al-Cu-Sc Alloys[J]. Materials Science and Engineering A, 2012, 534: 282–287
Nie Z R, Jin T N, Zou J X, et al. Development on Research of Advanced Rare-Earth Aluminum Alloy[J]. Transactions of Nonferrous Metals Society of China, 2003, 13 (3): 509–514
Xiao D H, Wang J N, Ding D Y, et al. Chen. Effect of Cu Content on the Mechanical Properties of An Al-Cu-Mg-Ag Alloy[J]. Journal of Alloys and Compounds, 2002, 343: 77–81
Zhao D G, Liu X F, Pan Y C, et al. Microstructure and Mechanical Properties of In Situ Synthesized (TiB2+Al2O3)/Al-Cu Composites[J]. Journal of Materials Processing Technology, 2007, 189: 237–241
Jang J H, Nam D G, Park Y H, et al. Effect of Solution Treatment and Artificial Aging on Microstructure and Mechanical Properties of Al-Cu Alloy[J]. Transactions of Nonferrous Metals Society of China, 2013, 23: 631–635
Zeren M. Effect of Copper and Silicon Content on Mechanical Properties in Al-Cu-Si-Mg Alloys[J]. Journal of Materials Processing Technology, 2005, 169(2): 292–298
Liu X Y, Pan Q L, Lu C G, et al. Microstructure and Mechanical Properties of Al-Cu-Mg-Mn-Zr Alloy with Trace Amounts of Ag[J]. Materials Science and Engineering A, 2009, 525:128–132
Wan W W, Han J M, Li W J, et al. Study of Rare Earth Element Effect on Microstructures and Mechanical Properties of An Al-Cu-Mg-Si Cast Alloy[J]. Rare Metals, 2006, 25: 129–132
Xu G F, Nie Z R, Jin T N, et al. Microstructure and Properties of Al-4Cu Alloy Containing Sc[J]. Transactions of Nonferrous Metals Society of China, 2004, (1): 63–66
Zhao H L, Yao D M, Qiu F, et al. High Strength and Good Ductility of Casting Al-Cu Alloy Modified by PrxOy and LaxOy[J]. Journal of Alloys and Compounds, 2011, 509: L43–L46
Han N, Bian X F, Li Z K, et al. Effect of Si on Microstructure and Mechanical Properties of the Al-4.5% Cu Alloys[J]. Acta Metallurgica Sinica (English Letters), 2006, 19(6): 405–410
Qiu H X, Yan H, Hu Z. Effect of Samarium (Sm) Addition on the Microstructures and Mechanical Properties of Al-7Si-0.7Mg Alloys[J]. Journal of Alloys and Compounds, 2013, 567: 77–81
Nogita K, McDonald S D, Dahle A K. Eutectic Modification of Al-Si Alloys with Rare Earth Metals[J]. Materials Transactions, 2004, 45(2): 323–326
Son S T, Lee J S, Kim D G, et al. Effects of Samarium (Sm) Additions on the Microstructure and Mechanical Properties of As-cast and Hotextruded Mg-5 wt%Al-3 wt%Ca-based Alloys[J]. Journal of Alloys and Compounds, 2009, 473 (1-2): 446–452
Wang J L, Wang L D, Wu Y M, et al. Effects of Samarium on Microstructures and Tensile Properties of Mg-5Al-0.3Mn Alloy[J]. Materials Science and Engineering A, 2011, 528: 4115–4119
Tsai Y C, Chou C Y, Lee S L, et al. Effect of Trace La Addition on the Microstructures and Mechanical Properties of A356 (Al-7Si-0.35Mg) Aluminum Alloys[J]. Journal of Alloys and Compounds, 2009, 487: 157–162
Wiesner U, Bieger W, Krabbes G. Determination of Phase Diagrams by Heat Evaluation from DTA[J]. Thermochimica Acta, 1996, 290: 115–121
Li C J, Yang H, Ren Z M, et al. Application of Differential Thermal Analysis to Investigation of Magnetic Field Effect on Solidification of Al-Cu Hypereutectic Alloy[J]. Journal of Alloys and Compounds, 2010, 505: 108–112
Lee J C, Byun J Y, Park S B, et al. Prediction of Si Contents to Supperss the Formation of Al4C3 in the SiCp/Al Composite[J]. Acta Metallurgica Sinica (English Letters), 1998, 46(5): 1771–1780
Song M, Chen K H, Huang L P. Effects of Ag Addition on Mechanical Properties and Microstructures of Al-8Cu-0.5Mg Alloy[J]. Transactions of Nonferrous Metals Society of China, 2006, 16: 766–771
Hall E O. The Deformation and Ageing of Mild Steel: III Discussion of Results[J]. Proceedings of the Physical Society Section B, 1951, 64(9): 747–753
Mallikarjuna C, Shashidhara S M, Mallik U S. Evaluation of Grain Refinement and Variation in Mechanical Properties of Equal-channel Angular Pressed 2014 Aluminum Alloy[J]. Materials & Design, 2009, 30(5): 1638–1642
Keiichiro O, Isao S, Junichi O. Effect of Silicon Addition on Grain Refinement of Copper Alloys[J]. Materials Letters, 2003, 57: 2280–2286
Karnesky R A, Van Dalen M E, Dunand D C, et al. Effects of Substituting Rare-earth Elements for Scandium in a Precipitationstrengthened Al-0.08 at%Sc Alloy[J]. Scripta Materialia, 2006, 55: 437–440
Van Dalen M E, Dunand D C, Seidman D N. Effects of Ti Additions on the Nanostructure and Creep Properties of Precipitation-strengthened Al-Sc Alloys[J]. Acta Materialia, 2005, 53: 4225–4235
Hu X W, Jiang F G, Ai F R, et al. Effects of Rare Earth Er Additions on Microstructure Development and Mechanical Properties of Die-cast ADC12 Aluminum Alloy[J]. Journal of Alloys and Compounds, 2012, 538: 21–27
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Supported by National Natural Science Foundation of China (Nos.51364035, 51405216), Ministry of Education Tied up with the Special Research Fund for the Doctoral Program for Higher School (No.20133601110001), Training Program Foundation for Young Scientist of Jiangxi (No.20153BCB23023), and the Natural Science Foundation of Jiangxi Province (No.20151BAB216018)
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Li, Z., Hu, Z. & Yan, H. Effect of samarium (Sm) addition on microstructure and mechanical properties of Al-5Cu alloys. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 31, 624–629 (2016). https://doi.org/10.1007/s11595-016-1420-x
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DOI: https://doi.org/10.1007/s11595-016-1420-x