Light and electron microscope investigations of cast Zn-Al alloys

• Autorzy: Krupińska B. , Rdzawski Z. , Labisz K.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this work is to determine the influence of alloy modification on the crystallisation kinetics and microstructure of the cast zinc alloy. This research work presents also the investigation results of derivative thermoanalysis performed using the UMSA device. The material used for investigation was the ZnAl8Cu1 alloy. Design/methodology/approach: approach The UMSA (Universal Metallurgical Simulator and Analyser) device allows it to determine the specific points of the solidifying alloy, including: Influence of the chemical concentrations of the modifiers, alloying additives, parameters of the melting process, influence of the cooling rate on the crystallization of phases and eutectics of the investigated alloys. Cooling rate influences the microstructure and properties of the investigated zinc cast alloys. For phase determination electron diffraction investigations were performed carried out on the transmission electron microscope. Findings: Change of the crystallization kinetics allows it to produce materials with improved properties, which are obtained by: microstructure refinement, reduction or elimination of segregation. Research limitations/implications: The material was examined metallographically and analysed qualitatively using light and scanning electron microscope as well as the area mapping and point-wise EDS microanalysis. The performed investigation are discussed for the reason of an possible improvement of thermal and structural properties of the alloy. Practical implications: The investigated material can find its use in the foundry industry; an improvement of component quality depends mainly on better control over the production parameters. Originality/value: Investigations concerning the development of optimal chemical composition and production method of zinc-aluminium alloys with selected rare earth metals with improved properties compared to elements made of alloys with appliance of traditional methods, will contribute to a better understanding of the mechanisms influencing the improvement of functional properties of the new.

Słowa kluczowe

EN

metallic alloys; thermal analysis; Zn-Al alloy; microstructure

PL

stopy metaliczne; analiza termiczna; stop Zn-Al; mikrostruktura

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 1
• Strony: 29--36
• Opis fizyczny: Bibliogr. 29 poz.

Twórcy

autor

Krupińska B.

autor

Rdzawski Z.

autor

Labisz K.

• Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

Bibliografia

• [1] E. Fraś, Alloy crystallisation, WNT, Warsaw, 2003.
• [2] Z. Górny, J. Sobczak, Non-ferrous metals based materials in foundry practice, ZAPIS, Cracow, 2005.
• [3] B. Krupińska, K. Labisz, L.A. Dobrzański, Z. Rdzawski, Crystallization kinetics of Zn alloys modified with Ce, La, Sr, Ti, B, Journal of Achievements in Materials and Manufacturing Engineering 42 (2010) 50-57.
• [4] B. Krupińska, L.A. Dobrzański, Z.M. Rdzawski, K. Labisz, Cooling rate influence on microstructure of the Zn-Al cast alloy, Journal of Achievements in Materials and Manufacturing Engineering 43/1 (2010) 13-20.
• [5] M. Krupiński, K. Labisz, L.A. Dobrzański, Structure investigation of the Al-Si-Cu alloy using derivative thermo analysis, Journal of Achievements in Materials and Manufacturing Engineering 34/1 (2009) 47-54.
• [6] M. Krupiński, K. Labisz, L.A. Dobrzański, Z.M. Rdzawski, Derivative thermo-analysis application to assess the cooling rate influence on the microstructure of Al-Si alloy cast, Journal of Achievements in Materials and Manufacturing Engineering 38/2 (2010) 115-122.
• [7] L.J. Yang, The effect of casting temperature on the properties of squeeze cast aluminium and zinc alloys, Journal of Materials Processing Technology 140 (2003) 391-396.
• [8] L.J. Yang, The effect of solidification time in squeeze casting of aluminium and zinc alloys, Journal of Materials Processing Technology 192-193 (2007) 114-120.
• [9] W.R. Osorio, A. Garcia, Modeling dendritic structure and mechanical properties of Zn-Al alloys as a function of solidification conditions, Materials Science and Engineering A325 (2002) 103-111.
• [10] A.E. Ares, L.M. Gassa, S.F. Gueijman, C.E. Schvezov, Correlation between thermal parameters, structures, dendritic spacing and corrosion behavior of Zn-Al alloys with columnar to equiaxed transition, Journal of Crystal Growth 310 (2008) 1355-1361.
• [11] M. Durman, S. Murphy, An electronmetallographic study of pressure die-cast commercial zinc-aluminium-based alloy ZA27, Journal of Materials Science 32 (1997) 1603-1611.
• [12] T.J. Chena, Y. Haoa, J. Sunb, Y.D. Lia, Effects of Mg and RE additions on the semi-solid microstructure of a zinc alloy ZA27, Science and Technology of Advanced Materials 4 (2003) 495-502.
• [13] J. Szajnar, The impact of selected physical factors on the crystallization process and structure of castings, Archives of Foundry Engineering 9-1M, 2009.
• [14] W. Kasprzak, J.H. Sokołowski, M. Sahoo, L.A. Dobrzański, Thermal and structural characteristics of the AM50 magnesium alloy, Journal of Achievements in Materials and Manufacturing Engineering 28/2 (2008) 131-138.
• [15] L.A. Dobrzański, M. Kasprzak, W. Kasprzak, J.H. Sokołowski, A novel approach to the design and optimisation of aluminium cast component heat treatment processes using advanced UMSA physical simulations, Journal of Achievements in Materials and Manufacturing Engineering 24/2 (2007) 139-142.
• [16] L.A. Dobrzański, M. Król, T. Tański, Thermal analysis, structure and mechanical properties of the MC MgAl3Zn1 cast alloy, Journal of Achievements in Materials and Manufacturing Engineering 40/2 (2010) 167-174.
• [17] L.A. Dobrzański, T. Tański, L. Cížek, Heat treatment impact on the structure of die-cast magnesium alloys, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 431-434.
• [18] G. Moskal, Thermal barrier coatings: characteristics of microstructure and properties, generation and directions of development of bond, Journal of Achievements in Materials and Manufacturing Engineering 37/2 (2009) 323-331.
• [19] L.A. Dobrzański, M. Król, T. Tański, Effect of cooling rate and aluminum contents on the Mg-Al-Zn alloys' structure and mechanical properties, Journal of Achievements in Materials and Manufacturing Engineering 43/2 (2010) 613-633.
• [20] L.A. Dobrzański, R. Maniara, J. Sokołowski, W. Kasprzak, Effect of cooling rate on the solidification behavior of AC AlSi7Cu2 alloy, Journal of Materials Processing Technology 191 (2007) 317-320.
• [21] L.A. Dobrzański, W. Borek, R. Maniara, Influence of the crystallization condition on Al-Si-Cu casting alloys structure, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 211-214.
• [22] J.H. Sokołowski, X-C. Sun, G. Byczyński, D.O. Northwood, D.E. Pentod, R. Thomas, The removal of copper phase segregation and the subsequent improvement in mechanical properties of cast 319 aluminium alloys by a two-stage solution heat treatment, Journal of Materials Processing Technology 53 (1995) 174-180.
• [23] L.A. Dobrzański, R. Maniara, J.H. Sokołowski, The effect of cast Al-Si-Cu alloy solidification rate on alloy thermal characteristics, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 217-220.
• [24] L.A. Dobrzański, R. Maniara, J. Sokołowski, W. Kasprzak, M. Krupinski, Z. Brytan, Applications of the artificial intelligence methods for modeling of the ACAlSi7Cu alloy crystallization process, Journal of Materials Processing Technology 192-193 (2007) 582-587.
• [25] L.A. Dobrzanski, W. Kasprzak, M. Kasprzak, J.H. Sokołowski, A novel approach to the design and optimization of aluminum cast component heat treatment processes using advanced UMSA physical simulations, Journal of Achievements in Materials and Manufacturing Engineering 24/2 (2007) 139-142.
• [26] W. Kasprzak, J.H. Sokołowski, W. Sahoo, L.A. Dobrzański, Thermal and structural characteristics of the AZ50 magnesium alloy, Journal of Achievements in Materials and Manufacturing Engineering 29/2 (2008) 179-182.
• [27] L.A. Dobrzański, M. Krupiński, J.H. Sokołowski, Computer aided classification of flaws occurred during casting of aluminum, Journal of Materials Processing Technology 167/2-3 (2005) 456-462.
• [28] M. Krupiński, K. Labisz, L.A. Dobrzański, Z. Rdzawski, Derivative thermo analysis of the Al-Si cast alloy with addition of rare earths metals, Archives of Foundry Engineering 10/1 (2009) 79-82.
• [29] M. Krupiński, K. Labisz, L.A. Dobrzański, Structure investigation of the Al-Si-Cu alloy using derivative thermo analysis, Journal of Achievements in Materials and Manufacturing Engineering 34/1 (2009) 47-54.