The evaluation of microporosity and mechanical properties in high strength aluminum alloys with the use of numerical analysis and computed tomography

• Autorzy: Pysz S. , Żuczek R. , Małysza M. , Czekaj E. , Tchórz A.

Identyfikatory

DOI

10.7356/iod.2017.28

• Języki publikacji: EN

Abstrakty

EN

One of the aspects of sustainable development is the reduction of the concentration of CO₂ in the atmosphere. This could be achieved for example by the reduction of fuel consumption. That is why the research for the new construction and material solutions regarding the reduction of the weight of vehicles is so important. Alongside weight reduction of different kinds of vehicles, there is also the possibility of the application of alternative propulsion systems. The lower total vehicle weight allows to extend the lifetime of the batteries with the reduction of recharge cycles. The use of the aluminum base AlZnMgCu as cast alloy which is known as 7xxx series plastic forming alloy, allows to significantly reduce the weight of the components manufactured as cast structures, 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 micro and macro porosity. The study presents the relationship between the cooling rate and the area of occurrence and percentage of microporosity. Obtained 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 a test specimen obtained from the varying wall thickness of the experimental casting. The evaluation of the mechanical properties was conducted on the basis of the static tensile test.

Słowa kluczowe

EN

AlZnMgCu alloy; microporosity; mechanical properties; computed tomography

• Wydawca: Instytut Odlewnictwa
• Czasopismo: Prace Instytutu Odlewnictwa
• Rocznik: 2017
• Tom: Vol. 57, no. 4
• Strony: 297--302
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Pysz S.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Żuczek R.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Małysza M.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Czekaj E.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

autor

Tchórz A.

• Foundry Research Institute, ul. Zakopiańska 73, 30-418 Krakow, Poland

Bibliografia

• 1. Pysz S., R. Żuczek, E. Czekaj, J. Piekło, M. Maj. 2016. Lightweight, high-strenght aluminum AlZnMgCu alloy castings. World Foundry Congress, 21‒25 May 2016, Nagoya, Japan.
• 2. Żuczek R., S. Pysz, M. Maj, J. Piekło. 2015. “Shaping the strength of cast rocker arm for special purpose vehicle”. Archives of Foundry Engineering 15 (3) : 95‒98.
• 3. Maj M., S. Pysz, J. Piekło, A. Gazda. 2012. “Fatigue testing of AlZnMgCu alloy used for parts of suspension system”. Inżynieria Materiałowa 33 (6) : 635‒638.
• 4. David M.D., R.D. Foley, J.A. Griffin, Ch.A. Monroe. 2016. “Microstructural characterization and thermodynamic simulation of cast AlZnMgCu alloys”. International Journal of Metalcasting 10 (1) : 2‒20.
• 5. Druschitz E.A. 2013. High strength cast aluminum alloy development. Birmingham, Alabama: University of Alabama.
• 6. Dymek S. 2012. Nowoczesne stopy aluminium do przeróbki plastycznej. Kraków: Wydawnictwa AGH.
• 7. Lim S.T., I.S. Eun, S.W. 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.
• 8. Żuczek R., S. Pysz, P. Sprawka, T. Muszyński. 2015. “The innovative design of suspension cast components of vehicles made from high-strength AlZnMgCu alloy resistant to an IED type threat”. Solid State Phenomena 223 : 181–190.

Uwagi

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