Microstructure and mechanical properties of the Al-Ti alloy with cerium addition

• Autorzy: Dobrzański, L. A. , Labisz, K. , Maniara, R. , Olsen, A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In this work there are presented the investigation results of mechanical properties and microstructure concerning mainly intermetallic phases of the aluminium – titanium alloy with a defined content of 2 and 4 % of cerium addition. The purpose of this work was also to determine the heat treatment conditions for solution heat treatment of the investigation alloys. Design/methodology/approach: The reason of this work was to determine the heat treatment influence, particularly solution heat treatment time to the changes of the microstructure, as well to determine which intermetallic phases occur after the heat treatment performed, and how is the morphology of these particles. Findings: After solution heat treatment for 4 hours the structure changes. The grains are larger and no more uniform as showed before. The most stable intermetallic in the Al-Ti system is the Al3Ti phase. The solution heat treatment time should be greater than 4 hours to ensure a proper solution of titanium and cerium in the Al-á solid solution. Research limitations/implications: The investigated aluminium samples were examined metallographically using optical microscope with different image techniques, scanning electron microscope and also analyzed using a Vickers micro-hardness tester, also EDS microanalysis was made. Practical implications: As an implication for the practice a new alloy can be developed, some other investigation should be performed in the future, but the knowledge found in this research shows an interesting investigation direction. Originality/value: The combination of light weight and high strength Ti-based alloys is very attractive for aerospace and automotive industries. Furthermore, the presence of calcium cerium into existence new unknown phases as well can enhance the thermal stability of ternary Al-Ti-Ce alloy because of its higher melting point then Al-Ti.

Słowa kluczowe

PL

odlewnictwo; obróbka cieplna; stop aluminium; cer

EN

casting; heat treatment; aluminium alloy; cerium

• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 37, nr 2
• Strony: 622-629
• Opis fizyczny: Bibliogr. 25 poz., rys., tabl.

Twórcy

autor

Dobrzański, L. A.

autor

Labisz, K.

autor

Maniara, R.

autor

Olsen, A.

• Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

Bibliografia

• [1] J. Djuricic, S. Boro; G. Pickering, P. Stephen, Nanostructured cerium oxide: preparation and properties of weakly-agglomerated powders, Journal of the European Ceramic Society 19/ 11 (1999) 1925-1934.
• [2] M. Bethencourt, F.J. Botana, M.J. Cano, M. Marcos, J.M. Sánchez-Amaya, L. González-Rovira, Using EIS to analyse samples of Al–Mg alloy AA5083 treated by thermal activation in cerium salt baths, Corrosion Science 50/5 (2008) 1376-1384.
• [3] M. Beschliesser, H. Clemens, H. Kestler, F. Jeglitsch, Phase stability of a c-TiAl based alloy upon annealing: comparison between experiment and thermodynamic calculations, Scripta Materialia 49 (2003) 279-284.
• [4] S. Banumathy, P. Ghosal, A. K. Singh, On the structure of the Ti3Al phase in Ti–Al and Ti–Al–Nb alloys, Journal of Alloys and Compounds 394 (2005) 181–185.
• [5] M. Goral, G. Moskal, L. Swadzba, Gas phase aluminising of TiAl intermetallics, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 443-446.
• [6] S. Lartigue-Korinek, C. Legros, C. Carry, F. Herbst, Titanium effect on phase transformation and sintering behaviour of transition alumina, Journal of the European Ceramic Society 26 (2006) 2219–2230.
• [7] J. Szajnar, T. Wróbel, Inoculation of primary structure of pure aluminium, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 283-286.
• [8] P. L. Schaffer, A. K. Dahle, Settling behaviour of different grain refiners in aluminium, Materials Science and Engineering 413-414 (2005) 373-378.
• [9] Y. Han, D. Shu, J. Wang, B. Sun, Microstructure and grain refining performance of Al-5Ti-1B masteralloy prepared under high-intensity ultrasound, Materials Science and Engineering A430 (2006) 326-331.
• [10] L. A Dobrzański, K. Labisz, R. Maniara, Microstructure investigation and hardness measurement in Al-Ti alloy, Proceedings of the 13th Scientific International Conference „Achievements in Mechanical and Materials Engineering” AMME’2005, Zakopane, 2005, 161-166.
• [11] X. Wang, A. Jha, R. Brydson, In situ fabrication of Al3Ti particle reinforced aluminium alloy metal–matrix composites, Materials Science and Engineering A364 (2004) 339-345.
• [12] V. Maurice, G. Despert, S. Zanna, P. Josso, M.-P. Bacos, P. Marcus, XPS study of the initial stages of oxidation of a2-Ti3Al and c-TiAl intermetallic alloys, Acta Materialia 55 (2007) 3315-3325.
• [13] G. Mrówka-Nowotnik, J. Sieniawski, M. Wierzbińska, Analysis of intermetallic particles In AlSi1MgMn aluminium alloy, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 155-158.
• [14] G. Mrówka-Nowotnik, J. Sieniawski, M. Wirzbińska, Intermetallic phase particles in 6082 aluminium alloy, Archives of Materials Science and Engineering 28/1 (2007) 69-76.
• [15] L. A Dobrzański, K. Labisz, A. Olsen, P. Zgierski, Precipitation processes during heat treatment of the Al-Mg-Cu-Zn alloy for car chassis, Proceedings of the 10th Jubilee Scientific International Conference „Achievements in Mechanical and Materials Engineering” AMME’2001, Zakopane, 2001, 645-650 (in Polish).
• [16] P. Švancárek, D. Galusek, F. Loughran, A. Brown, R. Brydson, A. Atkinson, F. Riley, Microstructure–stress relationships in liquid-phase sintered alumina modified by the addition of 5 wt.% of calcia–silica additives, Acta Materialia 54 (2006) 4853-4863.
• [17] L. F. Mondolfo, Aluminium Alloys structure and Properties, Butterwortha, London, 1976.
• [18] T. Lipiński, Improvement of mechanical properties of AlSi7Mg alloy with fast cooling homogenous modifier, Archives of Foundry Engineering 8 (2008) 85-88.
• [19] P. Ashraf, P. Muhamed; S. M. A. Shibli, Development of cerium oxide and nickel oxide-incorporated aluminium matrix for marine applications, Journal of Alloys and Compounds 484/ 1-2 (2009) 477-482.
• [20] C. Weiping, Diffusion of cerium in the aluminium lattice, Journal of Materials Science Letters 16/22 (1997) 1824 - 1826.
• [21] A. Pardo, S. Feliú, M. C. Merino, R. Arrabal; E. Matykina, The effect of cerium and lanthanum surface treatments on early stages of oxidation of A361 aluminium alloy at high temperature, Applied Surface Science 254/2 (2007) 586-595.
• [22] A. de Frutos, M. A. Arenas, Y. Liu, P. Skeldon, G. E. Thompson, J. de Damborenea, A. Conde, Influence of pre-treatments in cerium conversion treatment of AA2024-T3 and 7075-T6 alloys, Surface and Coatings Technology 202 (2008) 3797-3807.
• [23] M. F. Montemor, A. M. Simões, M. J. Carmezim, Characte-rization of rare-earth conversion films formed on the AZ31 magnesium alloy and its relation with corrosion protection, Applied Surface Science 253/16 (2007) 6922-6931.
• [24] T. Dhannia, S. Jayalekshmi, M.C. Santhosh Kumar; T. Prasada Rao, A. Chandra Bose, Effect of aluminium doping and annealing on structural and optical properties of cerium oxide nanocrystals, Journal of Physics and Chemistry of Solids 70/11 (2009) 1443-1447.
• [25] A. Decroly, C. André; J. Petitjean, J. Jean-Pierre, Study of the deposition of cerium oxide by conversion on to aluminium alloys, Surface and Coatings Technology 194/1 (2005) 1-9.