New Results Regarding the Cavitation Destruction Behavior of Heat-Treated CuZn39Pb3 Brass with Different Parameters

Abstract:

Among other parts made of brass there are also the blades and the rotors of the hydraulic machines, respectively ship propellers, which during operation are degraded by cavitation erosion. As a result, most of the researches, including the most recent ones, are focused on the morphological analysis of structures eroded under the impact of micro-jets and shock waves, produced by cavitation hydrodynamics. The goal is to create new materials, but also to use new treatment technologies to increase cavitation resistance. As the literature is quite poor in studies related to the materials resistance to cavitation erosion, respectively treatments and technological procedures of it’s improvement, this paper presents the research results on the behavior of vibration cavitation erosion, carried out on three sets of CuZn39Pb3 brass samples, subjected to volumetric heat treatments of hardening for putting in solution at 800°C, followed by tempering at 250°C, 400°C and 600°C. The characterization of the behavior and the cavitation resistance of the structures resulting from the applied heat treatments is performed based on macroscopic images, taken at different representative periods, SEM images at the end of the test duration and values ​​of specific parameters recommended by ASTM G32-2016. The analysis highlights the differences caused by the change in structure by varying the temperature, but also the hardness of the surface exposed to the cavity. Thus, of the three treatments, it is found that the best resistance to cavitation is conferred by the structure resulting from hardening at 800°C, with tempering at 250°C.

• Periodical: Advanced Materials Research (Volume 1172)
• Pages: 1-8
• DOI: https://doi.org/10.4028/p-462v06
• Online since: June 2022
• Authors: Cristan Ghera, Iosif Lazăr, Daniela Alexa, Ilare Bordeasu*, Nicuşor Alin Sîrbu, Daniel Ostoia, Mihai Hluscu, Cornelia Laura Salcianu, Daniel Catalin Stroita, Dumitru Viorel Bazavan, Marcela Sava, Lavinia Madalina Micu
• Keywords: Brass, Cavitation Erosion, Erosion Depth, Hardness, Heat Treatment, Microstructure, Resistance to Cavitation

References

[1] I. Anton, Cavitația, Vol II, Editura Academiei RSR, Bucuresti, (1985).

[2] 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

[3] I. Bordeaşu, Eroziunea cavitaţională a materialelor, EdituraPolitehnica, Timişoara, (2006).

[4] I. Lazar, Tehnici de optimizare a rezistenţei la eroziune prin cavitaţie a unor aliaje Cu-Zn şi Cu-Sn, Teza de doctorat, Timisoara, (2020).

[5] I. Lazar, I. Bordeasu, M.O. Popoviciu, I. Mitelea, C.M. Craciunescu, L.D. Pirvulescu, M. Sava, L.M. Micu, Evaluation of the brass CuZn39Pb3 resistance at vibratory cavitation erosion, International conference on applied sciences ICAS 2018, Banja Luka, Bosnia Hertegovina, (2018).

DOI: 10.1088/1757-899x/477/1/012002

[6] I. Bordeasu, M.O. Popoviciu, C. Ghera, L.M. Micu, L.D. Pirvulescu, T. Bena, The use of Rz roughness parameter for evaluation of materials behavior to cavitation erosion, ICAS 2017, IOP Conference Series: Materials Science and Engineering, Vol. 294, No. 1, art. no. 012020, 2018,.

DOI: 10.1088/1757-899x/294/1/012020

[7] I. Bordeasu, Monografia Laboratorului de cercetare a eroziunii prin cavitație al Universității Politehnica Timișoara (1960-2020), Editura Politehnica Timişoara, (2020).

[8] Information on https://copperalliance.ro/despre-cupru/cupru-si-aliaje-de-cupru/aliaje//.

[9] Registrul naval roman, Reguli pentru clasificarea si constructia navelor maritime, Vol V, Bucuresti, (1986).

[10] S. Tabacu, A. Hadar, V. Balasoiu, Numerical Procedures for the Improvement of the Structural Response of Thermoplastic Manufactured Parts, MATERIALE PLASTICE, Vol. 46, Nr.2, (2009) 192-197.

[11] D. Popescu, A. Hadar, C.E. Cotet, Manufacturing of ABS P400 solid cellular structures with closed cells by fused deposition modeling as rapid prototyping process, MATERIALE PLASTICE, vol. 43. nr.2, (2006), 175-179.

[12] G. Gheorghe, A. Z. C.G. Amza, L. Anton, Determination through numerical computation of the designed and functional parameters of ultra acustic systems for ultrasonic welding of intelligent composite materials, MATERIALE PLASTICE, vol. 44, nr. 2 (2007), 21-128.

[13] T. Küçükömeroğlu, L. Kara , 2014 The friction and wear properties of CuZn39Pb3 alloys under atmospheric and vacuum conditions, Wear, 309 (2014), p.21–28.

DOI: 10.1016/j.wear.2013.10.003

[14] G. A. Pantazopoulos, A.I. Toulfatzis, 2012, Fracture Modes and Mechanical Characteristics of Machinable Brass Rod, Metallography, Microstructure, and Analysis, 1(2), (2012) p.106–114.

DOI: 10.1007/s13632-012-0019-7

[15] M.Türker, M., Z. Y. Comert, A.Kısasöz, K.A. Guler, Experimental Research on Properties of Naval Brass Castings, Praktische Metallographie, 53(1), 2016, 24-35.

DOI: 10.3139/147.110362

[16] M. Abedini, F. Reuter, S. Hanke, Corrosion and material alterations of a CuZn38Pb3 brass under acoustic cavitation, Ultrasonics Sonochemistry, Volume 58 (2019), 104628.

DOI: 10.1016/j.ultsonch.2019.104628