The Influence of the Microporosity on the Mechanical Properties of the AlZnMgCu Alloy, Based on the Numerical Analysis and Laboratory Trials

• Autorzy: Pysz S. , Żuczek R. , Piekło J. , Maj M.

Identyfikatory

DOI

10.1515/afe-2017-0145

• Języki publikacji: EN

Abstrakty

EN

The ecological meanings clearly indicates the need of reducing of the concentration of the CO₂ in the atmosphere, which can be accomplished through the lowering of the fuel consumption. This fact implies the research for the new construction solutions regarding the reduction of the weight of vehicles. The reduced weight of the vehicle is also important in the case of application of the alternative propulsion, to extend the lifetime of the batteries with the reduction of recharge cycles. The use of cast alloy AlZnMgCu compliant of plastic forming class 7xxx alloy, are intended to significantly reduce the weight of the structures, while ensuring high strength properties. The wide range of the solidification temperature, which is more than 150°C, characterizes this alloy with a high tendency to create the micro and macro porosity. The study presents the relationship between the cooling rate and the area of occurrence and percentage of microporosity. Then the results were linked to the local tensile strength predicted in the simulation analysis. The evaluation of the microporosity was performed on the basis of the CT (computed tomography) and the analysis of the alloy microstructure. The microstructure analysis was carried out on test specimen obtained from the varying wall thickness of the experimental casting. The evaluation of the mechanical properties was prepared on the basis of the static tensile test and the modified low cycle fatigue test (MLCF).

Słowa kluczowe

EN

AlZnMgCu alloy; microporosity; mechanical properties; low fatigue cycle test

PL

stop AlZnMgCu; mikroporowatość; właściwości mechaniczne; niskocyklowe badanie zmęczeniowe

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 4
• Strony: 137--142
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Pysz S.

• Foundry Research Institute, 73 Zakopiańska Str., 30-418 Cracow, Poland

autor

Żuczek R.

• Foundry Research Institute, 73 Zakopiańska Str., 30-418 Cracow, Poland

autor

Piekło J.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Department of Foundry Process Engineering, 23 Reymonta Str., 30-059 Cracow, Poland

autor

Maj M.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Department of Foundry Process Engineering, 23 Reymonta Str., 30-059 Cracow, Poland

Bibliografia

• [1] Pysz, S., Żuczek, R., Czekaj, E., Piekło, J. & Maj, M. (2016). Lightweight, high-strenght aluminium AlZnMgCu alloy castings. World Foundry Congress, 21–25 May 2016. Nagoya, Japan.
• [2] Pysz, S., Czekaj, E., Żuczek, R., Maj, M. & Piekło, J. (2016). Low cycle mechanical and fatigue properties of AlZnMgCu alloy. Archives of Foundry Engineering. 16(1), 55-60.
• [3] Żuczek, R., Pysz, S., Maj, M. & Piekło, J. (2016). Shaping the strength of cast rocker arm for special purpose vehicle. Archives of Foundry Engineering. 15(3), 95-98.
• [4] Maj, M., Pysz, S., Piekło, J. & Gazda, A. (2012). Fatigue testing of AlZnMgCu alloy used for parts of suspension system. Inżynieria Materiałowa. 33(6), 635-638.
• [5] Druschitz1, A.P. & Griffin, J. (2009). Advanced Cast Aluminum Alloys. Shape Casting: The 3rd International Symposium, The Minerals, Metals & Materials Society, 2009, (pp. 53-60).
• [6] David, M., Foley, R., Griffin, J. & Monroe, Ch. (2016). Microstructural characterization and thermodynamic simulation of cast AlZnMgCu alloys. International Journal of Metalcasting. 10(1), 2-20.
• [7] Druschitz, E.A. (2013). High strength cast aluminum alloy development. Doctoral dissertation, University of Alabama, Birmingham.
• [8] Seong Taek Lim, Il Sang Eun & Soo Woo Nam (2003). Control of Equilibrium Phases (M,T,S) in the Modified Aluminum Alloy 7175 for Thick Forging Applications. Materials Transactions. 44(1), 181-187.
• [9] Maj, M., Pietrzak, K. & Piekło J. (2013). Modified low cycle method as a new criterion for a life fatigue assessment in foundry industry. Archives of Metallurgy and Materials. 2013 58(3), 877-881.
• [10] Maj, M. & Piekło J. (2016). Al 6082 and Al 7075 alloys under the modified low-cycle fatigue test. Metallurgy and Foundry Engineering. 42(1), 57-68.
• [11] Gerard, D.A. & Koss D.A. (1990): The dependence of crack initiation on porosity during low cycle fatigue. Material Science Engineering. A 129(1), 77-85.
• [12] Czekaj, E. (2011). Nickel-free piston silumins of high dimensional stability (pp. 90–94). Kraków: Foundry Research Institute.
• [13] Dymek, S. (2012). Modern aluminum alloys for plastic processing (pp. 81-89). Kraków: AGH.

Uwagi

PL

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