Effects of processing variables on the microsegregation of directionally cast samples
作者： Marcelo Aquino Martorano , José Deodoro Trani Capocchi
DOI: 10.1007/S11661-000-0093-3
关键词: Materials science 、 Equiaxed crystals 、 Metallurgy 、 Dendrite (crystal) 、 Longitudinal axis 、 Metallic materials 、 Microprobe
摘要: An investigation into the effects of processing variables on microsegregation directionally cast samples Cu-8 wt pct Sn alloys is presented. The were previously obtained in four different experimental conditions, which brought about types dendritic growth. Each sample had a cylindrical shape and was sectioned transversal slices whose degree measured by microprobe analyses quantitative metalography. A decrease along longitudinal axis toward surface observed. This behavior simulated using comprehensive mathematical model detailed thermal history samples. Columnar equiaxed regions seen to have levels microsegregation, might be result differences interdendritic distances (ID), as shown evidence. It also noticed that solute profiles calculated those showed better agreement if local dendrite arm spacing considered calculations rather than an average spacing.
springer.com
sci-hub.se 参考文章(30)
M. B. Cortie, C. E. Mavrocordatos, The decomposition of the beta phase in the copper-tin system Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 22, pp. 11- 18 ,(1991) , 10.1007/BF03350944
Donna Sue Plickert, Nikki D. Wheaton, Kathleen Mills, Hugh Baker, Alloy phase diagrams ASM International. ,(1992)
S. N. Singh, B. P. Bardes, M. C. Flemings, Solution treatment of cast al-4.5 pct Cu alloy Metallurgical and Materials Transactions B. ,vol. 1, pp. 1383- 1388 ,(1970) , 10.1007/BF02900259
W. Kurz, D.J. Fisher, Dendrite growth at the limit of stability: tip radius and spacing Acta Metallurgica. ,vol. 29, pp. 11- 20 ,(1981) , 10.1016/0001-6160(81)90082-1
V. Laxmanan, Cellular and dendritic growth in a binary alloy melt: A marginal stability approach Journal of Crystal Growth. ,vol. 75, pp. 573- 590 ,(1986) , 10.1016/0022-0248(86)90103-X
H. Esaka, W. Kurz, Columnar dendrite growth: A comparison of theory Journal of Crystal Growth. ,vol. 69, pp. 362- 366 ,(1984) , 10.1016/0022-0248(84)90343-9
M.A. Martorano, J.D.T. Capocchi, Mathematical modelling of microsegregation in eutectic and peritectic binary alloys Materials Science and Technology. ,vol. 16, pp. 483- 490 ,(2000) , 10.1179/026708300101508135
F. Weinberg, E. Teghtsoonian, Microsegregation in unidirectionally cast copper alloys Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science. ,vol. 3, pp. 93- 111 ,(1972) , 10.1007/BF02680589
M. N. Gungor, A statistically significant experimental technique for investigating microsegregation in cast alloys Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 20, pp. 2529- 2533 ,(1989) , 10.1007/BF02666687
J. Lipton, M. E. Glicksman, W. Kurz, Equiaxed dendrite growth in alloys at small supercooling Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 18, pp. 341- 345 ,(1987) , 10.1007/BF02825716