Evaluating the Cavitation Erosion of 7075-T651 Aluminum Alloy Heat Treated by Artificial Aging at 140 °C for 12 Hours

Abstract:

Aluminum-based alloys, due to their high properties compared to pure aluminum, have expanded their use in building the aircraft strength structures, in the automotive construction and in the naval field. Some of these, such as the radome (aircraft nose) and the wings of the airplane, are exposed also to intense stress from the erosion created by the impact with the raindrops. The literature considers this type of damage to be assimilated by the erosion trough cavitation. Therefore, the paper presents the results of the behavior and resistance to erosion trough vibratory cavitation of the 7075 - T651 aluminum alloy structure, heat treated by artificial aging at 140 °C for 12 hours. The research has been carried out on a standard device that complies with the requirements described in ASTM G32-2016. The structure strength obtained through the researched heat treatment, is evaluated through comparison with the state obtained by artificial aging at 180 °C with a similar duration of 12 hours. The evaluation is done by comparing the parameters recommended by the ASTM G32-2016 norms of the two heat treatments. The results show that the achieved gain is slightly increased.

• Periodical: Solid State Phenomena (Volume 349)
• Pages: 77-86
• DOI: https://doi.org/10.4028/p-8DicAk
• Online since: September 2023
• Authors: Alexandru Nicolae Luca, Ilare Bordeasu*, Lavinia Madalina Micu, Cristan Ghera, Rodica Bădărău, Cornelia Laura Salcianu, Daniel Ostoia, Mihai Hluscu, Nicuşor Alin Sîrbu
• Keywords: Cavitation Erosion, Cavity Resistance, Erosion Depth, Erosion Rate, Mechanical Properties, Microstructure, Semi-Finished

References

[1] https://www.britannica.com/science/aluminum

[2] L. Morar, E. Campean: Masini unelte cu comanda numerica, Editura U.T Press, Cluj-Napoca, Romania (2015)

[3] https://www.google.com/search?q=aluminium+alloy++pump&tbm=isch&ved= 2ahUKEwjsg5ifnor7AhXKReUKHWijC6UQ2-cCegQIABAA&oq=aluminium+alloy++pump&gs_lcp=CgNpbWcQA1CfCVifCWCfC2gAcAB4AIABvwGIAb4CkgEDMC4ymAEAoAEBqgELZ3dzLXdpei1pbWfAAQE&sclient=img&ei=T6BfY6ygIsqLlQfoxq6oCg&bih=664&biw=1536#imgrc=eXrZKOupWLgSQM

[4] https://www.indiamart.com/proddetail/ez-fan-impeller-20613615730.html

[5] https://www.amazon.de/-/en/Aluminium-Alloy-Vane-Propeller-Boots/dp/B01EZPAPK0

[6] ***ISO EN AW-7075 http://highgrademetals.co.nz/Aluminium/Aluminium-7075/

[7] I. Bordeasu: Monograph of the Cavitation Erosion Research Laboratory of the Polytechnic University of Timisoara (1960-2020). Editura POLITEHNICA, ISBN 978-606-35-0371-9, Timisoara (2020)

[8] ***Standard method of vibratory cavitation erosion test, ASTM, Standard G32-(2016)

[9] I. Mitelea: Materiale inginereşti, Editura Politehnica, Timişoara, Romania, (2009)

[10] I. Bordeasu, C. Ghera, D. Istrate, L. Salcianu, B. Ghiban, D. Bazavan, L.M. Micu L, D.C. Stroita, A. Suta, I. Tomoiaga, A.N. Luca: Resistance and Behavior to Cavitation Erosion of Semi-Finished Aluminum Alloy 5083, "HIDRAULICA" (No. 4/2021), pp.17-24

DOI: 10.3390/cryst12111538

[11] I. Bordeaşu: Eroziunea cavitaţională asupra materialelor utilizate în construcţia maşinilor hidraulice şi elicelor navale. Efecte de scară,, Timişoara, (1997)

[12] O. Oanca: Tehnici de optimizare a rezistenţei la eroziunea prin cavitaţie a unor aliaje CuAlNiFeMn destinate execuţiei elicelor navale, Teza de doctorat, Timișoara (2014)

[13] D. Istrate, B.G. Sbârcea, A.M. Demian, A.D. Buzatu, L. Salcianu, I. Bordeasu, L. M. Micu, C. Ghera, B. Florea and B. Ghiban Correlation between Mechanical Properties—Structural Characteristics and Cavitation Resistance of Cast Aluminum Alloy Type 5083, Crystals (2022)

DOI: 10.3390/cryst12111538

[14] I. Bordeasu, M.O. Popoviciu, I. Mitelea, V. Balasoiu, B. Ghiban, D. Tucu: Chemical and mechanical aspects of the cavitation phenomena, REVISTA DE CHIMIE, Volume 58, Issue 12, pp.1300-1304 (2007)

[15] I. Bordeasu, I. Mitelea, L. Salcianu, C.M. Craciunescu: Cavitation Erosion Mechanisms of Solution Treated X5CrNi18-10 Stainless Steels, JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME 138 (3), (2016)Article Number 031102

DOI: 10.1115/1.4032489

[16] L.M. Micu, I. Bordeasu, M.O. Popoviciu: "A New Model for the Equation Describing the Cavitation Mean Depth Erosion Rate Curve", Rev. Chim. (Bucharest), 68, no. 4, pp.894-898, (2017)

DOI: 10.37358/rc.17.4.5573

[17] I. Anton Cavitatia, Vol I, Editura Academiei RSR, Bucuresti, (1984)

[18] R. Garcia, F.G. Hammitt, R.E. Nystrom: Corelation of cavitation damage with other material and fluid properties, Erosion by Cavitation or Impingement, ASTM, STP 408 Atlantic City, (1960)

DOI: 10.1520/stp46052s