Crystallographic conditions for the initiation of cavitation erosion in CuMn11Al11 bronze

• Autorzy: Chmiel J. , Zasada D.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The basic aim of this paper is to examine and present specific destruction processes connected with cavitation erosion of multi-component Cu-Mn-Al bronzes. In technical operational conditions these processes are 'masked' by the effects of electrochemical corrosion phenomena. However, these destructive processes may significantly accelerate the destruction of flow devices and marine propulsion systems. The essential phenomena occurring during these processes are incubation and propagation of brittle cracks in the planes of cleavage planes of the ordered phase β (Cu3Mn2Al) that occurs in the examined group of alloys. Additional purpose is the assessment of possible applications of alloys with single-phase structure of intermetallic phases as model materials for research into erosion-cavitation resistance. Design/methodology/approach: This work presents research results concerning erosion cavitation resistance of a model alloy examined at a cavitation jet stand. The destructed areas were examined by gravimetric methods and those using scanning microscopy combined with computer image analysis. As the test materials used were single phase model alloys with the composition simulating selected phase components of Cu-Mn-Al bronzes, it was possible to examine erosion cavitation phenomena in the conditions of minimized effect of electrochemical phenomena. Findings: It has been found that at the initial period of destruction of the phase β in multi-component Mn-Al bronzes the prevailing form of destruction was a classical attack along grain boundaries, starting from the grain boundary junctions while in cases where the Cu3Mn2Al superstructure was present, the major mechanism of the incubation of erosion cavitation damage in the phase β is brittle cracking along cleavage planes {001} oriented at 45° angle to the exposed surface. Research limitations/implications: An essential problem is the verification of the results obtained using the computer-based image analysis by other methods. It seems purposeful to carry out micro-diffraction examination by the EBSP method and making a 'map' of lattice orientation of particular grains on the surface of a specimen, followed by a series of cavitation tests. Practical implications: The observed phenomena can be regarded as the basic explanation of observed accelerated wear of marine propellers that had been repaired by casting and welding methods. Originality/value: The value of this work is that cavitation erosion was examined in the conditions of minimized influence of electrochemical factors.

Słowa kluczowe

EN

cavitation erosion; brittle cracking; intermetallic alloys; image analysis

PL

erozja kawitacyjna; kruche pękanie; intermetale; analiza obrazów

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 33, nr 1
• Strony: 21--28
• Opis fizyczny: Bibliogr. 28 poz.

Twórcy

autor

Chmiel J.

autor

Zasada D.

• Maritime University, ul. Wały Chrobrego 1-2, 70-500 Szczecin, Poland,

Bibliografia

• [1] R.T. Knapp, J.W. Daily, F.G. Hammit, Cavitation, McGraw – Hill, New York, 1970.
• [2] K. Steller, T. Krzysztofowicz, Methods of materials testing endanger on the cavitation process, Scientific Reports of Institute of Flow Machines (Gdańsk) 152/1072/82 (1982) (in Polish).
• [3] J. Steller, International cavitation erosion test and quantitative assessment of material resistance to cavitation, Wear 233-235 (1999) 51-64.
• [4] J. Hucińska, M. Głowacka, State of examination on the cavitation destruction of alloys metals and the protection. Materials Engineering 2 (2001) 79-86 (in Polish).
• [5] R. Jasionowski, Examination of materials resistivity on the cavitation erosion, Scientific Reports WSM Szczecin 72 (2003) 105- 120.
• [6] H.M. Shalaby, A. Al-Hashem, H. Al-Mazeedi, A. Abdullah, Field and laboratory study of cavitation corrosion of nickel aluminium bronze in sea water, British Corrosion Journal 30/1 (1995) 63-70.
• [7] J.T. Chang, C.H. Yeh, J.L. He, K.C. Chen, Cavitation erosion and corrosion behavior of Ni-Al intermetallic coatings, Wear 255/1-6 (2003) 162-169.
• [8] W.J. Tomlinson, N. Kalitsounakis, G. Vekinis, Cavitation erosion of aluminas, Ceramics International 25/4 (1999) 331-338.
• [9] M. Matsumura, K. Noishiki, A. Sakamoto, Jet-in-slit test for reproducing flow-induced localized corrosion on copper alloys, Corrosion 54/1 (1998) 79-88.
• [10] ICET transactions, http://www.imp.gda.pl/icet/index.htm
• [11] G. Silva, Wear generation in hydraulic pumps, SAE Transactions 99/2 (1990) 635-652.
• [12] Grinberg, A. Ya, Consideration of corrosion in material cavitation stability determination, Tyazheloe Mashinostroenie 12 (1992) 15-16 (in Russian).
• [13] G. Patience, Developments in marine propellers, Proceedings of the Institution of Mechanical Engineers, Power and Process Engineering A205/2 (1991) 77-88.
• [14] J. Chmiel, J. Grabian, Chosen problems of resistivity on the cavitation erosion of multiphase metallic materials, Proceedings of the International Conference “Technology '99”, Bratysława, 1999, 916-920.
• [15] T. Momma, A. Lichtarowicz, Study of pressures and erosion produced by collapsing cavitation, Wear 186-187/2 (1995) 425-436.
• [16] G.A. Schmitt, W. Buecken, R. Fanebust, Source: Modeling microturbulences at surface imperfections as related to flow-induced localized corrosion, Corrosion 48/5 (1992) 431-440.
• [17] A. Kowarsch, Z. Zaczek, Cooper and its alloys in the shipbuilding, Marine Press, Gdańsk, 1989 (in Polish).
• [18] P. Brezina, Heat Treatment of Complex Aluminium Bronzes, International Metal Reviews 27/2 (1982) 77-120.
• [19] J. Chmiel, D. Zasada, Corrosion-cavitation destruction of β phase in multicomponent manganium-aluminum bronzer, Corrosion protection 11s/A/2003 205-208 (in Polish).
• [20] J. Chmiel, R. Jasionowski, W. Przetakiewicz, D. Zasada, Corrosion-cavitation properties of phase components of manganium-aluminum bromzes, Exploitation problems 4/2003 19-28 (in Polish).
• [21] J.W. Wyrzykowski, E. Pleszakow, J. Sieniawski, Deformation and cracking of metals, WNT, Warsaw, 1999.
• [22] Mathematics – Engineers handbook, WNT, Warsaw, 1986.
• [23] L. Wojnar, K.J. Kurzydłowski, J. Szala, Practics of image analysis, Polish Stereological Society, Cracow, 2002.
• [24] T. Okada, S. Hattori, F. Suzuki, Fundamental study on cavitation erosion using a magnesium oxide single crystal. Transactions of the Japan Society of Mechanical Engineers A 60/569 (1994) 147-152.
• [25] J.R. Taylor, An Introduction to Error Analysis, Oxford University Press, 1982.
• [26] M. Szkodo, Application of image analysis methods in the determination of materials’ cavitation resistivity, Exploitation Problems 1/2006 (in Polish).
• [27] R. Jasionowski, J. Chmiel, D. Zasada, Examination of cavitation resistivity of Cooper alloys applied as a power screw, Proceedings of the 10th Congress “Technical Devices Exploitation”, Jabłonki, 2005, 179-188.
• [28] L. Wilczyński, Cavitation erosion of screws and rudders, Proceedings of the CTO Seminar, Gdańsk, 2005.