Effect of Different Variants of Heat Treatment on Mechanical Properties of the AlSi17CuNiMg Alloy

• Autorzy: Jarko A. , Pezda J.

Identyfikatory

DOI

10.1515/afe-2016-0023

• Języki publikacji: EN

Abstrakty

EN

Dispersion hardening, as the main heat treatment of silumins having additions of copper and magnesium, results in considerable increase of tensile strength and hardness, with simultaneous decrease of ductility of the alloy. In the paper is presented an attempt of introduction of heat treatment operation consisting in homogenizing treatment prior operation of the dispersion hardening, to minimize negative effects of the T6 heat treatment on plastic properties of hypereutectoidal AlSi17CuNiMg alloy. Tests of the mechanical properties were performed on a test pieces poured in standardized metal moulds. Parameters of different variants of the heat treatment, i.e. temperature and time of soaking for individual operations were selected basing on the ATD (Thermal Derivation Analysis) diagram and analysis of literature. The homogenizing treatment significantly improves ductility of the alloy, resulting in a threefold increase of the elongation and more than fourfold increase of the impact strength in comparison with initial state of the alloy. Moreover, the hardness and the tensile strength (R_m) of the alloy decrease considerably. On the other hand, combination of the homogenizing and dispersion hardening enables increase of elongation with about 40%, and increase of the impact strength with about 25%, comparing with these values after the T6 treatment, maintaining high hardness and slight increase of the tensile strength, comparing with the alloy after the dispersion hardening.

Słowa kluczowe

EN

heat treatment; homogenizing; aluminum alloys; mechanical properties; elongation; silumin

PL

obróbka cieplna; homogenizacja; stopy aluminium; właściwości mechaniczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 2
• Strony: 41--44
• Opis fizyczny: Bibliogr. 15 poz., il., tab., wykr.

Twórcy

autor

Jarko A.

• Department of Production Engineering and Automation, University of Bielsko-Biała, ul. Willowa 2, 43- 300 Bielsko-Biała, Poland

autor

Pezda J.

• Department of Production Engineering and Automation, University of Bielsko-Biała, ul. Willowa 2, 43- 300 Bielsko-Biała, Poland

Bibliografia

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• [2] Piątkowski, J. & Matuła, T. (2015). The microstructure and mechanical properties of the AlSi17Cu5 alloy after heat treatment. Archives of Metallurgy and Materials. 60(3), 1813-1817.
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• [4] Dobrzański, L.A. (2006). Engineering materials and materials design. Warszawa: WNT. (in Polish)
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• [6] Mohamed, A.M.A. & Samuel, F.H. (2012). A review on the heat treatment of Al-Si-Cu/Mg casting alloys. Czerwinski F. (Eds.). Heat Treatment – Conventional and Novel Applications. 55-72. InTech.
• [7] Pezda, J. (2010). Effect of heat treatment operations on the Rm tensile strength of silumins. Archives of Foundry Engineering. 10(4), 61-64.
• [8] Piątkowski, J. (2001). Influence of the heat treatment on the mechanical properties of the AlSi17 alloy. Archives of Foundry. 1(2), 557-564. (in Polish).
• [9] Sjölander, E. & Seifeddine, S. (2010). The heat treatment of Al-Si-Cu-Mg casting alloys. Journal of Materials Processing Technology. 210, 1249-1259.
• [10] Domke, W. (1989). Vademecum of materials. Warszawa: WNT. (in Polish).
• [11] Jarco, A. & Pezda, J. (2015). Impact of various types of heat treatment on mechanical properties of the EN AC-AlSi6Cu4 alloy. Archives of Foundry Engineering. 15(2), 35-38.
• [12] Jabłoński, S. (1971). Heat treater small guide-book. Warszawa: WNT. (in Polish).
• [13] PN-EN ISO 6892-1:2010P. Metals - Tensile test - Part1 - Test method in ambient temperature. Polish Committee for Standardization. (in Polish).
• [14] Poniewierski, Z. (1989). Crystallization, structure and properties of silumins. Warszawa: WNT. (in Polish).
• [15] Niezgodziński, M.E. & Niezgodziński, T. (2010). Strength of materials. Warszawa: WNT. (in Polish).

Uwagi

PL

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