Derivative thermo-analysis application to assess the cooling rate influence on the microstructure of Al-Si alloy cast

• Autorzy: Krupiński M. , Labisz K. , Dobrzański L. A. , Rdzawski Z. M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The application of the UMSA device (Universal Metallurgical Simulator and Analyzer) has allow to determine the liquidus/solidus thermal points of solidified alloy, as well the thermal points, where phase- or eutectic crystallisation occurs. Design/methodology/approach: Investigations were performed using cast aluminium-silicon alloys, known as EN AC-4XXXX according to the PN-EN 1706:2001 standard. The solidification process was investigated using the metallurgical UMSA simulator connected to recording devices equipped with simulating cooling system. For the alloy microstructure investigation the optical microscope and transmission and scanning electron microscope with EDS equipment were used for evaluation of the chemical composition of the phases occurred in the investigated alloy. Findings: Investigation of the interdependences occurred between phase morphology and cooling rate using thermo-analysis has given the main results. Practical implications: In the metal casting industry the improvement of the quality of components depends mainly on proper control over the production parameters. Originality/value: The performed investigations allow to determine the microstructure changes as well the derivative curves in comparison to the cooling rate applied for the alloy.

Słowa kluczowe

EN

metallic alloy; microstructure; thermo derivative analysis

PL

stop metalowy; mikrostruktura; analiza termopochodna

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2010
• Tom: Vol. 38, nr 2
• Strony: 115--122
• Opis fizyczny: Bibliogr. 15 poz., rys., tabl.

Twórcy

autor

Krupiński M.

autor

Labisz K.

autor

Dobrzański L. A.

autor

Rdzawski Z. M.

• 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] H. Mayer, M. Papakyriacou, B. Zettl, S.E. Stanzl-Tschegg, Influence of porosity on the fatigue limit of die cast magnesium and aluminium alloys, International Journal of Fatigue 25/3 (2003) 245-256.
• [2] M. Wierzbińska, G. Mrówka-Nowotnik, Identification of phase composition of AlSi5Cu2Mg aluminium alloy in T6 condition, Archives of Materials Science and Engineering 30/2 (2008) 85-88.
• [3] L. Bäckerud, G. Chai, J. Tamminen: Solidification Characteristics of Aluminum Alloys, Vol. 2., AFS, 1992.
• [4] L. Bäckerud, G. Chai: Solidification Characteristics of Aluminum Alloys, Vol. 3, AFS, 1992.
• [5] Q. G. Wang, Microstructural effects on the tensile and fracture behaviour of aluminum casting alloys A356/357, Metallurgical and Materials Transactions A 34/12 (2003) 2887-2899.
• [6] D. Ovono, I. Guillot, D Massinon, The microstructure and precipitation kinetics of a cast aluminium alloy, Scripta Materialia 55/3 (2006) 259-262.
• [7] M. Faraji, I. Todd, H. Jones, Effect of solidification cooling rate and phosphorus inoculation on number per unit volume of primary silicon particles in hypereutectic aluminium-silicon alloys, Journal of Materials Science 40/24 (2005) 6363-6365.
• [8] S. Mudry, I. Shtablavyi, I. Shcherba, Liquid eutectic alloys as a cluster solutions, Archives of Materials Science and Engineering 34/1 (2008) 14-18.
• [9] G. Pelayo, J.H. Sokołowski, R. Lashkari, A case reasoning aluminium thermal analysis platform for the prediction of W319 Al cast component characteristics, Journal of Achievements in Materials and Manufacturing Engineering 36/1 (2009) 7-17.
• [10] H. Yamagata, H. Kurita, M. Aniołek, W. Kasprzak, J. H. Sokolowski, Thermal and metallographic characteristics of the Al-20% Si high-pressure die-casting alloy for monolithic cylinder blocks, Journal of Materials Processing Technology 199 (2008) 84-90.
• [11] Y. Birol, Analysis of macro segregation in twin-roll cast aluminium strips via solidification curves, Journal of Alloys and Compounds 486/1-2 (2009) 168-172.
• [12] M. Krupiński, K. Labisz, L. A. Dobrzański, Z. Rdzawski, Derivative thermo analysis of the Al-Si cast alloy with addition of rare earths metals, Archieves of Foundry Engineering 10/1 (2010) 79-82.
• [13] L. A. Dobrzański, M. Krupiński, K. Labisz, B. Krupińska, A Grajcar, Phases and structure characteristics of the near eutectic Al-Si-Cu alloy using derivative thermo analysis, Materials Science Forum 638-642 (2010) 475-480.
• [14] L. A. Dobrzański, W. Kasprzak, M. Kasprzak, J. H. Sokolowski, 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.
• [15] 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.