Acta Metall Sin  1998, Vol. 34 Issue (2): 113-118    DOI:

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GRAIN REFINEMENT IN UNDERCOOLED Ni-50%Cu ALLOY

LI Jinfu;YANG Gencang;ZHOU Yaohe (Stste Key Laboratory of Solidification Processing; Northwestern Polytechnical University; Xi'an 710072)

LI Jinfu;YANG Gencang;ZHOU Yaohe (Stste Key Laboratory of Solidification Processing; Northwestern Polytechnical University; Xi'an 710072). GRAIN REFINEMENT IN UNDERCOOLED Ni-50%Cu ALLOY. Acta Metall Sin, 1998, 34(2): 113-118.

Abstract References Related Articles Recommended Metrics Download:  PDF(1485KB)  Export:  BibTeX | EndNote (RIS)       Abstract  With undercooling increasing, the undercooled Ni-50%Cu alloy underwent two grain refinement processes. One occurred in the undercooling range of 50 -100 K and the other one at the undercoolings higher than the critical value 220K where the refined crystal possesses the dendritic substructures. It is suggested that the tendency to remelting of the primarily formed dendrite can be evaluated with the dimensionless superheating of the earliest frozen part in the dendrite stems during recalescence. The dimensionless superheating increases first and then decreases with increasing undercooling, and its highest value corresponds to the undercooling range in which the first grain refinement takes place. Both the thermodynamic analysis and the crystal cotheuration indicate that the grain refinement at low undercoolings is caused by the remelting of solid and that at higher undercoolings by stress which leads to the disintegration and recrystallization of the primary dendrite. Key words:  undercooling      Ni-Cu alloy      grain relinement      thermodynamic analysis      Received:  18 February 1998      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I2/113 1Herlach D M. Aater. Sei Eng 1994; R12: 177 2 Kattamis T Z, Flemings M C. AFS Trans, 1967; 75: 191 3 Powell G L F.J Mater Sci Lett, 1991; 10: 745 4Eckler K,Cochrane R F,Herlach D M,Feuerbacher B,Jurisch M.Phys Rev B,1992;45:5019 5Hunt J D, Jackson K A.J Appl Phys, 1966; 37: 254 6Schwarz M, Karma A, Eckler K, Herlach D M. Phys Rev, Lett,1994;73:1380 7Ivantsov G R Dokl Akad Naud SSSR, 1947; 58: 567 8 Boettinger W J, Coriell S R, Trivedi R. In: Mehrabian R, Parrish P A eds, Rapid Solidification Processing:Principles and Technologies IV, Baton Rouge, LA: Claitor’s Publishing Division,1988:13 9 Piccone T P, Wu Y, Shiohara Y, Flemings M C. Metall Trans, 1987; 18A: 925 10Willnecker R,Herlach D M,Ruerbacher B.Phys Rev Lett,1989;62:2707 11Eckler K, Herlach D M. Metall Trans, 1992; 23A: 2672e [1] XU Junfeng, ZHANG Baodong, Peter K Galenko. Model of Eutectic Transformation Involving Intermetallic Compound[J]. 金属学报, 2021, 57(10): 1320-1332. [2] Kuanhui HU, Xinping MAO, Guifeng ZHOU, Jing LIU, Zhifen WANG. Effect of Si and Mn Contents on the Microstructure and Mechanical Properties of Ultra-High Strength Press Hardening Steel[J]. 金属学报, 2018, 54(8): 1105-1112. [3] Yun LI, Lianjie LIU, Xinming LI, Jinfu LI. Solidification of Undercooled Co75B25 Alloy[J]. 金属学报, 2018, 54(8): 1165-1170. [4] Dandan FAN, Junfeng XU, Yanan ZHONG, Zengyun JIAN. Effect of Superheated Temperature and Cooling Rate on the Solidification of Undercooled Ti Melt[J]. 金属学报, 2018, 54(6): 844-850. [5] Jinfu LI, Yaohe ZHOU. Remelting of Primary Solid in Rapid Solidification of Deeply Undercooled Alloy Melts[J]. 金属学报, 2018, 54(5): 627-636. [6] Zengyun JIAN, Tao XU, Junfeng XU, Man ZHU, Fang'e CHANG. Development of Solid-Liquid Interfacial Energyof Melt-Crystal[J]. 金属学报, 2018, 54(5): 766-772. [7] Bin ZHAI, Kai ZHOU, Peng Lü, Haipeng WANG. Rapid Solidification of Ti-6Al-4V Alloy Micro-Droplets Under Free Fall Condition[J]. 金属学报, 2018, 54(5): 824-830. [8] Jianglei ZHU, Qing WANG, Haipeng WANG. Thermophysical Properties and Atomic Distribution of Undercooled Liquid Cu[J]. 金属学报, 2017, 53(8): 1018-1024. [9] Junhui YAN,Zengyun JIAN,Man ZHU,Fang'e CHANG,Junfeng XU. SOLIDIFICATION CHARACTERISTICS AND MICRO-STRUCTURE OF HIGH UNDERCOOLED Al-70%Si ALLOY[J]. 金属学报, 2016, 52(8): 931-937. [10] Manjiao CHEN,Jiankang HUANG,Cuicui HE,Yu SHI,Ding FAN. THERMODYNAMIC ANALYSIS OF THE FORMATION OF Fe-Al-Zn INTERMETALLIC COMPOUNDS IN Al/GALVANIZED STEEL INTERFACE[J]. 金属学报, 2016, 52(1): 113-119. [11] CHEN Zheng, YANG Yanan, CHEN Qiang, XU Junfeng, TANG Yueyue, LIU Feng. RECALESCENCE EFFECT SIMULATION AND MICROSTRUCTURE EVOLUTION OF UNDERCOOLED Fe82B17Si1 ALLOY[J]. 金属学报, 2014, 50(7): 795-801. [12] WEN Qiang, JIAN Zengyun, ZHU Man, CHANG Fang'e, DANG Bo. EFFECTS OF RE ON THE SOLIDIFICAIION CHARACTERISTICS OF Al-80%Si ALLOY[J]. 金属学报, 2014, 50(5): 610-618. [13] GUO Xiong, LIN Xin, WANG Zhitai, CAO Yongqing, PENG Dongjian, HUANG Weidong. FORMATION MECHANISM OF ANOMALOUS EUTECTIC AND MICROSTRUCTURE EVOLUTION IN HIGHLY UNDERCOOLED SOLIDIFICATION OF Ni－30%Sn ALLOY[J]. 金属学报, 2013, 29(4): 475-482. [14] HU Rui, LIU Yi, ZHANG Tiebang, KOU Hongchao, LI Jinshan. PHASE SELECTION AND THE SOLIDIFICATION CHARACTERISTICS OF TiAl BASE ALLOYS IN THE NONEQUILIBRIUM SOLIDIFICATION[J]. 金属学报, 2013, 49(11): 1295-1302. [15] CHANG Fang'e ZHAO Zhiwei ZHU Man LI Na FANG Wen DONG Guangzhi JIAN Zengyun. SOLIDIFICATION BEHAVIORS OF HIGHLY UNDERCOOLED Ni-21.4%Si EUTECTIC ALLOY[J]. 金属学报, 2012, 48(7): 875-881. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed