Acta Metall Sin  2007, Vol. 43 Issue (11): 1138-1144     DOI:

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Refinement Mechanism of the Solidification Structure of Cu--20%Pb Hypomonotectic Alloy by Deeply Undercooled Treatment

LIU Liqin; ZHANG Zhongming; XU Chunjie; GUO Xuefeng

School of Materials Science and Engineering; Xi'an University of Technology

LIU Liqin; ZHANG Zhongming; XU Chunjie; GUO Xuefeng. Refinement Mechanism of the Solidification Structure of Cu--20%Pb Hypomonotectic Alloy by Deeply Undercooled Treatment. Acta Metall Sin, 2007, 43(11): 1138-1144 .

Abstract References Related Articles Recommended Metrics Download:  PDF(888KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The solidification microstructure of Cu-20%Pb hypomonotectic alloy was investigated by means of combination of melted glass denucleation and cyclical superheating. The variation of thermomechanical parameters related to solidification of undercooled Cu-20%Pb hypomonotectic alloy was calculated based on the BCT-LKT dendritic growth model, thus the solidification mechanism of the alloy was discussed. The experimental results shows that the microstructure of Cu-20%Pb hypomonotectic alloy combines α(Cu) dendrites with Pb phases distributed between them at little undercooling solidification. Dendrites get refined and uniformed as undercooling increases. It can be concluded that the reason of dendrite refinement at different undercooling is not same. The melt can be heated above the solidus temperature due to release of latent heat during rapid solidification of the undercooled melt, thus part of solidified dendrites can be melted and refined when the undercooling is smaller than 200K. When undercooling is high, the contraction of different parts of dentrites and flow velocity of the melt are so high that the dendrites are impacted and become fragmented. Thus when undercooling is above 200K, dentrites will be refined by dendrite remelting and dendrite fragmentation together. Key words:        Received:  06 March 2007      ZTFLH:  TG172   Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors LIU Liqin ZHANG Zhongming XU Chunjie GUO Xuefeng URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2007/V43/I11/1138 [1]Yang G C,Xie H,Hao W X.Trans Nonferrous Met Soc Chin,2006;16:290 [2]Hao W X,Yang G C,Xie H.Foundry Technol,2004;25: 105 (郝维新，杨根仓，谢辉．铸造技术，2004；25：105) [3]Sun W L,Zhang Z M,Xu C J,Guo X F.Trans Mater Heat Treat,2005;26(6):53 (孙万里，张忠明，徐春杰，郭学锋．材料热处理学报，2005；26(6)：53) [4]Zhang Z M,Sun W L,Xu C J,Guo X F.J Xi'an Univ Technol,2005;21:118 (张忠明，孙万里，徐春杰，郭学锋．西安理工大学学报，2005；21：118) [5]Sun W L,Zhang Z M,Xu C J,Guo X F.Ordnance Mater Sci Eng,2005;28(1):66 (孙万里，张忠明，徐春杰，郭学锋．兵器材料科学与工程，2005；28(1)：66) [6]Zheng H X,Li J G,Guo X F.Mater Design,2007;28: 558 [7]Boettinger W J,Coriell S R,Trivedi R.Rapid Solidifi- cation Processing:Principle and Technologes IV.In: Mehrabian R,Parrish P A,eds.,Baton Rouge:Claitor's Publishing Division,1988:13 [8]Trivedi R,Lipton J,Kurz W.Acta Metall,1987;35:965 [9]Kurz W,Trivedi R.Acta Metall Mater,1990;38:1 [10]Aziz M J.J Appl Phys,1982;53:1158 [11]Guo X F,Liu F,Yang G C,Xing J D.Acta Metall Sin, 2000;36:352 (郭学锋，刘峰，杨根仓，邢建东．金属学报，2000；36：352) [12]Fan J F,Yang G C,Liu X B,Wang J C,Song G S.J Nonferrous Met Chin,2003;13:344 (樊建锋，杨根仓，刘新宝，王锦程，宋广生．中国有色金属学报，2003；13：344) [13]Guo X F,Liu F,Yang G C,Xing J D.Prog Nat Sci,2000; 10:734 (郭学锋，刘峰，杨根仓，邢建东．自然科学进展，2000；10：734) [14]Eric A B.Smithells Metals Reference Book.6ed.London: Robert Hartholl Ltd,1983:8 [15]Eckler K,Cochrane R F,D M Herlach,Jurisch M.Phys Rev,1992;45B:5019 [16]Eckler K,Herlach D M,Aziz M J.Acta Metall Mater, 1994;42:975 [1] WANG Luning, LIU Lijun, YAN Yu, YANG Kun, LU Lili. Influences of Protein Adsorption on the in vitro Corrosion of Biomedical Metals[J]. 金属学报, 2021, 57(1): 1-15. [2] TUNG Feng'en;WANG Yuming Institute of Materials Science; Jilin University; Changchun. X-RAY ANALYSIS OF WORK-HARDENING PROCESS FOR POLYCRYSTALLINE а-BRASS DURING UNIAXIAL TENSILE TEST[J]. 金属学报, 1989, 25(2): 82-84. [3] WANG Jinliang, WANG Chenchong, HUANG Minghao, HU Jun, XU Wei. The Effects and Mechanisms of Pre-Deformation with Low Strain on Temperature-Induced Martensitic Transformation[J]. 金属学报, 2021, 57(5): 575-585. [4] DU Hegui;LIU Xin Northeast University of Technology; Shenyang. KINETICS OF CARBON COMBUSTION IN PLASMA AIR[J]. 金属学报, 1989, 25(2): 85-88. [5] . [J]. 金属学报, 2001, 37(1): 42-46 . [6] . [J]. 金属学报, 1999, 35(3): 320-324 . [7] . [J]. 金属学报, 2000, 36(1): 72-76 . [8] . [J]. 金属学报, 1999, 35(3): 330-333 . [9] . [J]. 金属学报, 1999, 35(3): 334-336 . [10] . [J]. 金属学报, 2000, 36(6): 647-650 . [11] . [J]. 金属学报, 2000, 36(6): 655-658 . [12] No Author. ACTA METALLURGLCA SLNLCA Volume 28 Series A 1992 SUBJECT INDEX[J]. 金属学报, 1992, 28(12): 63-90. [13] . [J]. 金属学报, 2000, 36(7): 780-784 . [14] No Author. ACTA METALLURGICA SINICA(JINSHU XUEBAO) Volume 28 1992 AUTHOR INDEX[J]. 金属学报, 1992, 28(12): 71-94. [15] Хань Яо-вэнь Инсмцмум мемаддов АН КНР;Г.н.Ойкс Московскц цнсмцмум смадц. НЗУЧЕНИЕ ПРОЦЕССОВ ДЕСУЛЬФУРАЦИИ ХНДКОΓО МЕТАЛЛА В ВАКУУМЕ[J]. 金属学报, 1963, 6(2): 98-110. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed