High-aluminium zinc alloy (ZnAl27Cu2) modified with titanium and boron

• Autorzy: Zyska A. , Konopka Z. , Łągiewka M. , Nadolski M. , Chojnacki A.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of investigations concerning the influence of the titanium-boron modifier quantity on the structure and mechanical properties of ZnAl27Cu2 alloy. The modification has been performed with the use of AlTi5B1 master alloy, thus introducing into the molten alloy 0.015%Ti and 0.003%B; 0.025%Ti and 0.005%B; 0.035%Ti and 0.007%B and eventually 0.045%Ti and 0.009%B. Samples for examination have been cast in sand moulds. The optimum mechanical properties Rm=440MPa and A5=8% have been achieved by introducing 0.035% Ti and 0.007% B into the alloy. It has been found that morphological changes of the primary crystals of \alfa solid solution take place due to the modification. The dendrites with widely outspread arms take the shape of rounded, globular crystals. The size of \alfa phase crystals decreases, but to the rather small degree, proportionally to the quantity of added modifier.

Słowa kluczowe

EN

Zn alloys; modification; structure; mechanical properties

PL

stop cynku; modyfikacja; struktura; właściwości mechaniczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2009
• Tom: Vol. 9, iss. 4
• Strony: 237--240
• Opis fizyczny: Bibliogr. 16 poz., rys., wykr.

Twórcy

autor

Zyska A.

autor

Konopka Z.

autor

Łągiewka M.

autor

Nadolski M.

autor

Chojnacki A.

• Department of Foundry, Technical University of Częstochowa, ul. Armii Krajowej 19, 42-200 Częstochowa, Polska,

Bibliografia

• [1] E. Gervais, H. Levert, M. Bess, The development of a family of zinc-based foundry alloys, Trans. Am. Foundrym. Soc. 88 (1980) 183-194.
• [2] E. J. Kubel, Expanding horizons for ZA alloy, Adv. Mater. Proc., 132 (1987) 51-57.
• [3] M. J. Barber, P. E. Jones, A new famiły of foundry alloys. Foundry Trade J., 148 (1980) 114-131.
• [4] P. P. Lee, T. Sava¸skan , E. Laufer, Wear resistance and microstructure of Zn-Al-Si and Zn-Al-Cu alloys, Wear 117 (1987) 79-89.
• [5] L. Jian, E. E. Laufer, J. Masounave, Wear in Zn-Al-Si alloys, Wear 165 (1993) 51-56.
• [6] B. K. Prasad, A. K. Patwardhan, A. H. Yegneswaran, Dry sliding wear characteristics of some zinc-aluminium alloys: a comparative study with a conventional bearing bronze at a slow speed, Wear 199 (1996) 142-151.
• [7] Z. Górny, J. Sobczak, Nowoczesne tworzywa odlewnicze na bazie metali nieżelaznych, Wyd. Za-pis, Kraków 2005.
• [8] B. K. Prasad, Influence of heat treatment on the physical, mechanical and tribological properties of a zinc-based alloy, Z. Metallkd. 87 (1996) 226-232.
• [9] B. K. Prasad, A. K. Patwardhan, A. H. Yegneswaran, Influence of heat treatment parameters on the microstructure and properties of some zinc-based alloys, J. Mater. Sci. 31 (1996) 6317-6324.
• [10] S. Murphy, T. Sava¸skan, Comparative wear behaviour of Zn-Al-based alloys in an automotive engine application, Wear 98 (1984) 151-161.
• [11] Z. Wendorff, Metaloznawstwo; WNT, Warszawa 1972.
• [12] N. Mykura, S. Murphy, Y. H. Zhu, Volume change in ternary Zn-Al-Cu alloy. Mater Res Soc Symp Proc 1984;21:841-6.
• [13] Y. H. Zhu, S. To, X. M. Liu, W. B. Lee, Microstructural changes inside the lamellar structures of alloy ZA27, Materials Characterization 57 (2006) 326-332.
• [14] M. Tokarski, Metaloznawstwo metali i stopów nieżelaznych w zarysie; Wyd. Śląsk, 1985.
• [15] Y. H. Zhu, Decomposition reactions in a quench-aged eutectoid alloy AlZn75Cu3Si2. J Mater Sci Technol 6 (1990) 125-31.
• [16] Cz. Adamski, S. Rzadkosz, Metalurgia i odlewnictwo metali nieżelaznych; cz. II; Stopy cynku oraz stopy miedzi; Wyd. AGH, Kraków 1992.