The Study of Phase Transformations of AlSi9Cu3 Alloy by DSC Method

• Autorzy: Piątkowski J. , Przeliorz R. , Gontarczyk A.
• Języki publikacji: EN

Abstrakty

EN

With the use of differential scanning calorimetry (DSC), the characteristic temperatures and enthalpy of phase transformations were defined for commercial AlSi9Cu3 cast alloy (EN AC-46000) that is being used for example for pressurized castings for automotive industry. During the heating with the speed of 10ºC∙min^-1 two endothermic effects has been observed. The first appears at the temperature between 495 ºC and 534 ºC, and the other between 555 ºC and 631 ºC. With these reactions the phase transformation enthalpy comes up as +6 J g^-1 and +327 J g^-1. During the cooling with the same speed, three endothermic reactions were observed at the temperatures between 584 ºC and 471 ºC. The total enthalpy of the transitions is – 348 J g^-1. Complimentary to the calorimetric research, the structural tests (SEM and EDX) were conducted on light microscope Reichert and on scanning microscope Hitachi S-4200. As it comes out of that, there are dendrites in the structure of α(Al) solution, as well as the eutectic (β) silicon crystals, and two types of eutectic mixture: double eutectic α(Al)+β(Si) and compound eutectic α+Al2Cu+β.

Słowa kluczowe

EN

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

PL

stop odlewniczy Al-Si; skaningowa kalorymetria różnicowa; analiza termiczna; przemiana fazowa; entalpia

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 4
• Strony: 109--112
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Piątkowski J.

• Silesian University of Technology, Faculty of Materials Science, Krasińskiego 8, 40-019 Katowice, Poland

autor

Przeliorz R.

• Silesian University of Technology, Faculty of Materials Science, Krasińskiego 8, 40-019 Katowice, Poland

autor

Gontarczyk A.

• Magna Modern Production Technologies S.A., Szkolna 15, 47-225 Kędzierzyn-Koźle, Poland

Bibliografia

• [1] Piątkowski, J. & Gajdzik, B. (2013). Testing Phase Changes in Al-Si Cast Alloys with Application of Thermal Analysis and Differential Calorimetric Analysis. Metalurgija. 52, 469-472.
• [2] Pezda, J. & Jarco, A. (2015). Influence of Natural Ageing on Impact Strength of the ENAC-AlSi9Cu3(Fe) Alloy. Archives of Foundry Engineering. 15(spec.1), 81-84.
• [3] Piątkowski, J. & Formanek, B. (2011). Cast AlSi9Cu4 alloy with Hybride Strenghtened by FexAly-Al2O3 Composite Powder. Materials Science and Engineering. 22. DOI: 012020.
• [4] Heusler, L. & Schneider, W. (2001). Influence of Alloying Elements on the Thermal Analysis Results of Al-Si Cast Alloys. Journal of Light Metals. 2, 17-26.
• [5] Kędzierski, Z. (1999). Thermodynamics of Alloy. Cracow: Publishing Science and Educational. (in Polish).
• [6] Piątkowski, J. (2013). Physical and Chemical Phenomena Affecting Structure, Mechanical Properties and Technological Stability of Hypereutectic Al-Si Alloys After Overheating. Gliwice: Silesian University of Technology. (in Polish).
• [7] Hatch, J.E. (1984). Aluminum: Properties and Physical Metallurgy. Ohio: American Society for Metals, Metals Park.
• [8] Molina, R., Amalberto, P., Rosso, M. (2011). Mechanical Characterization of Aluminum Alloys for High Temperature Applications. Part1: Al-Si-Cu alloys, Metallurgical Science and Technology 29-1.
• [9] Ashby, M., Jones, D. (1993). Materials Engineering. Warsaw: Publishing Science and Technical. (in Polish).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.