The Application of ATD and DSC Methods to Study of the EN AC-48000 Alloy Phase Transformations

• Autorzy: Piątkowski J. , Przeliorz R. , Szymszal J.

Identyfikatory

DOI

10.1515/afe-2017-0076

• Języki publikacji: EN

Abstrakty

EN

Tests concerning EN AC 48000 (AlSi12CuNiMg) alloy phase transition covered (ATD) thermal analysis and (DSC) differential scanning calorimetry specifying characteristic temperatures and enthalpy of transformations. ATD thermal analysis shows that during cooling there exist: pre-eutectic crystallization effect of Al9Fe2Si phase, double eutectic and crystallization α(Al)+β(Si) and multi-component eutectic crystallization. During heating, DSC curve showed endothermic effect connected with melting of the eutectic α(Al)+β(Si) and phases: Al2Cu, Al3Ni, Mg2Si and Al9Fe2Si being its components. The enthalpy of this transformation constitutes approx. +392 J g-1. During freezing of the alloy, DSC curve showed two exothermal reactions. One is most likely connected with crystallization of Al9Fe2Si phase and the second one comes from freezing of the eutectic α(Al)+β(Si). The enthalpy of this transformation constitutes approx. –340 J g-1. Calorimetric test was accompanied by structural test (SEM) conducted with the use of optical microscope Reichert and scanning microscope Hitachi S-4200. There occurred solution's dendrites α(Al), eutectic silicon crystal (β) and two types of eutectic solution: double eutectic α(Al)+β(Si) and multi-component eutectic α+AlSiCuNiMg+β.

Słowa kluczowe

EN

alloy Al-Si; thermal analysis; differential scanning calorimetry; phase transformations; enthalpy

PL

stop Al-Si; analiza termiczna; różnicowa kalorymetria skaningowa; przemiany fazowe; entalpia

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 2
• Strony: 207--211
• Opis fizyczny: Bibliogr. 11 poz., il., rys., tab.

Twórcy

autor

Piątkowski J.

• Faculty of Materials Engineering and Metallurgy, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

autor

Przeliorz R.

• Faculty of Materials Engineering and Metallurgy, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

autor

Szymszal J.

• Faculty of Materials Engineering and Metallurgy, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland

Bibliografia

• [1] Robles Hernandez, F.C. & Sokolowski, J.H. (2006). Comparison among and electromagnetic stirring and vibration melt treatments for Al-Si hypereutectic alloys. Journal of Alloys and Compounds. 426, 205-212.
• [2] Piątkowski, J. & Gajdzik, B. (2013). Testing phase changes in Al-Si cast alloys with application of thermal analysis and differential calorimetric analysis. Metalurgija. 52(4), 469-472.
• [3] Heusler, L. & Schneider, W. (2002). Influence of alloying on the thermal analysis results of Al-Si cast alloys. Journal of Light Metals. 2, 17-26.
• [4] Piątkowski, J. (2009). The phosphorus interaction on the process forming of primary structure of hypereutectic silumins. Archives of Foundry Engineering. 9(3), 125-128.
• [5] Emadi, D., Whiting, L.V., Nafisi, S. & Ghomashchi, R. (2005). Applications of thermal analysis in quality control of solidification processes. Journal of Thermal Analysis and Calorimetry. 81, 235-242.
• [6] Hohne, G.W.H., Hemminger, W., Flammersheim, H.-J. (2003). Differential scanning calorimetry. An introduction for practitioners. Springer-Verlag.
• [7] Chapman, L.A. (2004). Application of high temperature DSC technique to nickel based superalloys. Journal of Materials Science. 39(24), 7229-7236.
• [8] Starink, M.J. (2004). Analysis of aluminum based alloys by calorimetry: quantitative analysis of reactions and reaction kinetics. International Materials Reviews. 49(3-4), 191-226.
• [9] Jena A.K., Gupta A., Chaturvedi, M. (1989). A differential scanning calorimetric investigation of precipitation kinetics in the Al-1.53wt% Cu-0.79wt% Mg alloy. Acta Metallurgica 37(3), 885-895.
• [10] Molina, R., Amalberto, P. & Rosso, M. (2011). Mechanical characterization of aluminum alloys for high temperature applications Part 1: Al-Si-Cu alloys. Metallurgical Science and Technology. 29-1.
• [11] Jonathan, A. Lee. (2003). Cast aluminum alloy for high temperature applications. The Minerals, Metals and Materials Society. Automotive Alloys.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)