Acta Metall Sin  2004, Vol. 40 Issue (12): 1253-1256     DOI:

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THE EVOLUTION OF UNIDIRECTIONAL SOLIDIFI-CATION MICROSTRUCTURE OF THE Al-In MONOTECTIC ALLOYS IN HIGH TEMPERATURE GRADIENT

CUI Hongbao; GUO Jingjie; BI Weisheng; SU Yanqing; WU Shiping; FU Hengzhi

Department of Materials Science and Engineering; Harbin Institute of Technology; Harbin 150001

CUI Hongbao; GUO Jingjie; BI Weisheng; SU Yanqing; WU Shiping; FU Hengzhi. THE EVOLUTION OF UNIDIRECTIONAL SOLIDIFI-CATION MICROSTRUCTURE OF THE Al-In MONOTECTIC ALLOYS IN HIGH TEMPERATURE GRADIENT. Acta Metall Sin, 2004, 40(12): 1253-1256 .

Abstract References Related Articles Recommended Metrics Download:  PDF(196KB)  Export:  BibTeX | EndNote (RIS)       Abstract  High temperature gradient are employed under the directional condition to examine the influence of the ratio of gradient and solidification rate, G/R, on the microstructure of Al-17.5%In (mass fraction) alloys. The experimental results show that the microstructure evolution of monotectic alloy under the directional solidification is similar to the one of eutectic alloy. When steady growth formed, there exists an In-rich zone in the front of α phase and vice versa. The diffusion process plays a dominate role in the steady growth due to the small lamella distance. Unidirectional solidification microstructure of the alloys changes from fibrous structure to regular droplet-like array and finally random dispersion of In droplets in the aluminum matrix with increasing growth rate or decreasing temperature gradient. The change suggests that the transition of monotectic solidification structure has a closed relation to the morphological transition of solid-liquid interface. Key words:  aluminum-indium monotectic alloy      unidirectional solidification      high temperature gradient       Received:  28 December 2003      ZTFLH:  TG146.2   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors CUI Hongbao GUO Jingjie BI Weisheng SU Yanqing WU Shiping FU Hengzhi URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2004/V40/I12/1253 [1] Xie H, Wang J C, Fan J F, Hao W X, Yang G C. Hot Work Technol, 2003; (4): 49 (谢辉,王锦程,樊建锋,郝维新,杨根仓.热加工工艺,2003; (4):49) [2] Liu Y, Guo J J, Jia J. Foundry, 2000; 49(1):1 (刘源,郭景杰,贾均.铸造,2000;49(1):1) [3] Xian A P, Zhang X M, Li Z Y, Liu Q Q, Chen J Z, Li Y Y. Acta Metall Sin, 1996; 32: 113 (冼爱平,张修睦,李忠玉,刘清泉,陈继志,李依依.金属学 报, 1996;32:113) [4] Hayes L J, Andrews J B. Mater Sci Forum, 2000; 329-330:209 [5] Stoker C, Ratke L. 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