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Influence of solidification rate on microstructure of gravity cast AZ91 magnesium alloy

Wybrane pełne teksty z tego czasopisma
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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Derivative thermal (ATD) and microstructure analyses of gravity cast AZ91 magnesium alloy are presented. The alloy was cast into cold steel and sand moulds with the same dimensions. ATD curves - solidification curves and their first derivative - are presented. The investigated alloy exhibited a strong alloying elements segregation and the presence of [alpha] solid solution and [alpha+gamma] (Mg17Al12) eutectic mixture. Discontinuous precipitates of [gamma] phase were also observed in the microstructure of AZ91 cast into sand mould.
Rocznik
Strony
23--26
Opis fizyczny
Bibliogr. 21 poz., rys., tab., wykr.
Twórcy
autor
  • Institute of Materials Engineering, Częstochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland,, kacha@wip.pcz.pl
Bibliografia
  • [1] Mordike B.L., Ebert T.: Magnesium properties-applications-potential, Materials Science and Engineering A, 2001, Vol. 302, 37÷45.
  • [2] „Magnesium Alloys and Their Applications”, WILEY-VCH, Edited by K.U. Kainer, 2000.
  • [3] „Magnesium Alloys and Their Applications”, WILEY-VCH, Edited by K.U. Kainer, 2003.
  • [4] Braszczyńska-Malik K.N., Studium kształtowania mikrostruktury stopów magnez-aluminium, Wyd. WIPMiFS PCz., Częstochowa, 2005 (in Polish).
  • [5] Dahle A.K., Lee Y.C., Schaffer P.L., StJohn D.H., Development of as-cast microstructure in magnesium-aluminium alloys, J Light Met. 1 (2002) 61÷72.
  • [6] Duly D., Simon J.P., Brechet Y., On the competition between continuous and discontinuous precipitations in binary Mg–Al alloys, Acta Metal. Mater. 43 (1995) 101÷106.
  • [7] Celotto S., Bastow T. J., Study of precipitation in aged binary Mg–Al and ternary Mg–Al–Zn alloys using 27Al NMR spectroscopy, Acta Mater. 49 (2001) 41÷45.
  • [8] Amir Q.M., Gupta S.P., Cellular precipitation and precipitate coarsening in a Mg–Al alloy, Can. Metal. Quart. 34 (1995) 43÷50.
  • [9] Bradai D., Kadi-Hanifi M., Zięba P., Kuschke W. M., Gust W., The kinetics of the discontinuous precipitation and dissolution in Mg-rich Al alloys, J Mater. Sci. 34 (1999) 331÷336.
  • [10] Braszczyńska K.N., The microstructure of a Mg–10wt%Al alloys, Zeits. Metal. 93 (2002) 845÷850.
  • [11] Bradai D., Kadi-Hanifi M., Zięba P., Kuschke W. M., Gust W., The kinetics of the discontinuous precipitation and dissolution in Mg-rich Al alloys, J Mater. Sci. 34 (1999) 331÷336.
  • [12] Bradai D., Zieba P., Bischoff E., Gust W., A new mode of the discontinuous dissolution reaction in Mg–10 wt.% Al alloys, Mater. Chem. and Phys. 72 (2001) 401÷404.
  • [13] Bastow T.J., Celotto S., Clustering and formation of nano-precipitates in ductile aluminium and magnesium alloys, Mater. Sci. and Eng. C23 (2003) 757÷762.
  • [14] Brastow T.J., Smith M.E., Observation of precipitation in Mg–Al alloys by 25Mg and 27Al NMR, J Phys. Condensed. Matter 7 (1995) 4929÷4937.
  • [15] Zhang M.X., Kelly P.M., Crystallography of Mg17Al12 precipitates in AZ91D alloy, Scrip. Mater. 48 (2003) 647÷652.
  • [16] Matitrejean S., Verona M., Brechet Y., Prudy G.R., Morphological instabilities in Mg–7.7 at% Al, Scrip. Mater. 41 (2001) 1235÷1240.
  • [17] Bursik J., Svoboda M., A HREM and analytical STEM study of precipitates in an AZ91 magnesium alloy, Microchim. Acta 139 (2002)39÷42.
  • [18] Cerri E., Barbagallo S., The influence of high temperature exposure on aging kinetics of a die cast magnesium alloy, Mater. Let. 56 (2002) 716÷720.
  • [19] Gutman E.M., Unigovski Y., Levkovich M., Koren Z., Aghion E., Dangur M., Influence of technological parameters of permanent mold casting and die casting on ceep and strength of Mg alloy AZ91D, Mater. Sc. And Eng., A234-236 (1997) 880-883.
  • [20] Braszczyńska-Malik K.N.: Discontinuous and continuous precipitates in magnesium-aluminium type alloys, Journal of Alloys and Compounds, 447, 2009, 870-876.
  • [21] Kleiner S., Ogris E., Beffort O., Uggowitzer P.J.: Semi-solid metal processing of aluminium alloy A356 and magnesium alloy AZ91: comparison based on metallurgical considerations, Advanced Engineering Materials, 2003, Vol. 9, No. 5, 653÷658.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPZ3-0037-0004
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