Study of the Influence of Additions on the Formation of Microstructure of Al-Zn-Mg-Cu Alloys

• Autorzy: Pisarek B. P. , Czekaj E. , Pacyniak T.

Identyfikatory

DOI

10.24425/123630

• Języki publikacji: EN

Abstrakty

EN

The article presents the investigations of 7xxx aluminium alloys performed by the method of thermal and derivational analysis. The studies made it possible to identify the effect of the changes in the Cu concentration, the total Zn and Mg weight concentrations and the Zn/Mg weight concentration ratio on their crystallization process: the cooling as well as the kinetics and dynamics of the thermal process of cooling and crystallization. Metallographic studies were performed on the microstructure of the examined alloys and their HB hardness was measured. The evaluation of the changes was presented in reference to the model alloys EN AW-7003 and EN AW-7010, whose microstructure under the conditions of thermodynamic equilibrium are described by the phase diagrams: Al-Zn-Mg and Al-Zn-Mg-Cu. The performed investigations confirmed that the hardness HB of the examined alloys is mainly determined by the reinforcement of the matrix α_Al by the introduced alloy additions and the presence of phases Θ(Al₂Cu) and S(Al₂CuMg) rich in copper, as well as η(MgZn₂), in the examined alloys' microstructure. The increase of the amount of intermetallic phases precipitated in the microstructure of the examined alloys is caused, beside Cu, by the characteristic change of Zn wt. concentration and Mg. It was proposed that the process of one-stage thermal treatment of the examined alloys be introduced at a temperature of up to tJ-20 °C, which will prevent the exceedance of the solidus temperature.

Słowa kluczowe

EN

innovative casting material; innovative casting technology; Al-Zn-Mg-Cu alloy; TDA method; hardness HB

PL

innowacyjny materiał odlewniczy; innowacyjna technologia odlewnicza; stop Al-Zn-Mg-Cu; metoda ATD

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2018
• Tom: Vol. 18, iss. 4
• Strony: 39--44
• Opis fizyczny: Bibliogr. 7 poz., rys., tab., wykr.

Twórcy

autor

Pisarek B. P.

• Department of Materials Engineering and Production Systems of Lodz University of Technology, Stefanowskiego 1/15, 90-924 Łódź, Poland

autor

Czekaj E.

• Foundry Research Institute, Zakopiańska 73, 30-418 Kraków, Poland

autor

Pacyniak T.

• Department of Materials Engineering and Production Systems of Lodz University of Technology, Stefanowskiego 1/15, 90-924 Łódź, Poland

Bibliografia

• [1] PN-EN 573-3:2014-02 - English Version - Aluminium and aluminium alloys - Chemical composition and form of wrought products - Part 3: Chemical composition and form of products.
• [2] Górny, Z., Sobczak, J. (2005). Modern materials molding on the basis of non-ferrous metals. Kraków: ZA-PIS. (in Polish).
• [3] Ghosh, A. & Ghosh, M. (2018). Microstructure and texture development of 7075 alloy during homogenisation, Philosophical Magazine. 1-21. DOI: 10.1080/ 14786435.2018.1439596.
• [4] Petrov, D., Watson, A., Gröbner, J., Rogl, P., Tedenac, J.-C., Bulanova, M., Turkevich, V. & Lukas, H.L. (2005). Al-Mg-Zn (Aluminium-Magnesium-Zinc). In Effenberg G. & Ilyenko S. (Eds.). Landolt-Börnstein - Group IV Physical Chemistry 11 A3, Light Metal Systems. Part 3. Retrieved February 16, 2018, from SpringerMaterials. https://materials.springer.com/lb/docs/sm_lbs_978-3-540-31694-7_21. DOI: 10.1007/10915998_21.
• [5] Akopân, T.K., Zolotorevskij, V.S. & Hvan, A.V. (2013). Rasčet Fazovyh Diagramm Sistem Al-Cu-Zn-Mg i Al-Cu-Zn-Mg-Fe-Si. Litejnoe proizvodstvo. 3, 44-51. (in Russian).
• [6] Rapiejko, C., Pisarek, B., Czekaj, E. & Pacyniak, T. (2014). Analysis of AM60 and AZ91 alloy crystallisation in ceramic moulds by Thermal Derivative Analysis (TDA). Archives of Metallurgy and Materials. 59(4), 1449-1455. DOI: 10.2478/amm-2014-0246.
• [7] Effenberg, G., Prince, A., Lebrun, N., Lukas, H. & Harmelin, M. (2004). Al-Cu-Mg (Aluminium-Copper-Magnesium). In Effenberg G. & Ilyenko S. (Eds.). Landolt-Börnstein - Group IV Physical Chemistry 11 A2, Light Metal Systems. Part 2. Retrieved February 16, 2018, from SpringerMaterials https://materials.springer,com/lb/docs/sm_lbs_978-3-540-31687-9_4. DOI: 10.1007/10915967_4.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).