Effect of the Precipitation Hardening on the Structure of AlSi7Mg0.3Cu0.5 Alloy with Addition of Zr and Combination of Zr and Ti

• Autorzy: Kuriš M. , Bolibruchova D. , Matejka M. , Kantorikova E.

Identyfikatory

DOI

10.24425/afe.2021.136084

• Języki publikacji: EN

Abstrakty

EN

The article focused primarily on comparing the achieved mechanical results for AlSi7Mg0.3Cu0.5Zr and AlSi7Mg0.3Cu0.5Zr0.15Ti experimental alloys. Experimental variants with the addition of Zr ≥ 0.05 wt. % demonstrated the ability of Zr to precipitate in the form of Al3Zr or AlSiZr intermetallic phases. Zr precipitated in the form of long smooth needles with split ends. When evaluating the thermal analyses, the repeated peak was observed already with the initial addition of Zr in the range of approximately 630°C. It was interesting to observe the increased interaction with other intermetallic phases. EDX analysis confirmed that the individual phases are based on Cu, Mg but also Fe. Similar phenomena were observed in experimental alloys with a constant addition of Zr and a gradual increase in Ti by 0.1 wt. %. A significant change occurred in the amount of precipitated Zr phases. A more significant increase in mechanical properties after heat treatment of AlSi7Mg0.3Cu0.5Zr experimental alloys was observed mainly above the Zr content ≥ 0.15 wt. % Zr. The improvement of yield and tensile strength over the AlSi7Mg0.3Cu0.5 reference alloy after heat treatment was minimal, not exceeding 1 %. A more significant improvement after heat treatment occurred in modulus of elongation with an increase by 6 %, and in hardness with an increase by 7 %. The most significant drop occurred in ductility where a decrease by 31 % was observed compared to the reference alloy. AlSi7Mg0.3Cu0.5Zr0.15Ti experimental alloys, characterized by varying Ti content, achieved a more significant improvement. The improvement in tensile strength over the AlSi7Mg0.3Cu0.5 reference alloy after heat treatment was minimal, not exceeding 1 %. A more significant improvement after heat treatment occurred in modulus of elongation with an increase by 12 %, in hardness with an increase by 12 % and the most significant improvement occurred in yield strength with a value of 18 %. The most significant decrease also occurred in ductility where, compared to the reference alloy, the ductility drop was by up to 67 %.

Słowa kluczowe

EN

AlSi7Mg0.3Cu0.5; investment casting; precipitation; hardening; mechanical properties; AlZr

PL

AlSi7Mg0,3Cu0,5; odlewy; opad atmosferyczny; hartowanie; właściwości mechaniczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2021
• Tom: Vol. 21, iss. 1
• Strony: 95--100
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Kuriš M.

• University of Zilina, Faculty of Mechanical Engineering, Department of Technological Engineering, Zilina, Slovak Republic

autor

Bolibruchova D.

• University of Zilina, Faculty of Mechanical Engineering, Department of Technological Engineering, Zilina, Slovak Republic

autor

Matejka M.

• University of Zilina, Faculty of Mechanical Engineering, Department of Technological Engineering, Zilina, Slovak Republic

autor

Kantorikova E.

• University of Zilina, Faculty of Mechanical Engineering, Department of Technological Engineering, Zilina, Slovak Republic

Bibliografia

• [1] Vončina, M., Medved, J., Kores, S., Xie, P., Cziegler, A. & Schumacher, P. (2018). Effect of molybdenum an zirconium on aluminium casting alloys. Livarski Vestnik. 68-78.
• [2] Medved, J. & Kores, M.V.S. (2018). Development of innovative Al-Si-Mn-Mg alloys with hight mechanical properties. The Minerals, Metals & Materials Society. 373-380. DOI 10.1007/978-3-319-72284-9_50.
• [3] Pisarek, B.P., Rapiejko, C., Szymczak, T. & Payniak, T. (2017). Effect of Alloy Additions on the Structure and Mechanical Properties of the AlSi7Mg0.3 Alloy. Archives of Foundry Engineering. 17(1),137-142. ISSN: 1897-3310.
• [4] Mahmudi, R., Sepehrband, P. & Ghasemi, H.M. (2006). Improve properties of A319 aluminium casting alloy modified with Zr. Materials Letters. 2606-2610. DOI 10.1016/j.matlet.2006.01.046.
• [5] Sepehrband, P., Mahmudi, R., Khomamizadeh, F. (2004). Effect of Zr addition on the aging behavior of A319 aluminium cast alloy. Scripta Materialia. 253-257. DOI: 10.1016/j.scriptamat.2004.10.025.
• [6] Rakhmonov, J., Timelli, G. & Bonollo, F. (2017) Characterization of the solidification path and microstructure of secondary Al-7Si-3Cu-0,3Mg alloy with Zr, V and Ni additions. Material characterization. ISSN:1044-5803.
• [7] Krajewski, W., Geer, A., Buraś, J., Piwowarski, G. & Krajewski, P. (2019). New developments of hight-zinc Al-Zn-Cu-Mn cast alloys. Materialstoday Proceedings. 306-311. DOI: 10.1016/j.matpr.2018.10.410.
• [8] Hermandez-Sandoval, J., Samuel, A.M. & Vatierra, F.H. (2016). Thermal analysis for detection of Zr-rich phases in Al-Si-Cu-Mg 354-type alloys. Journal of metalcasting. ISSN 1939-5981.
• [9] Bolibruchova, D., Kuriš, M., Matejka, M., Major Gabryś, K., Vicen, M., (2020) Effect of Ti on selected properties of AlSi7Mg0.3Cu0.5 alloy with constant addition of Zr. Archives of Metalurgy and Materials. 66(1), 65-72. DOI: 10.24425/amm.2021.134760.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).