The influence of solid-state grain growth mechanism on the microstructure evolution in undercooled Ni-10at.%Fe alloy

被引：7
作者：
Chen, Z. [1 ,2 ]
Chen, Q. [1 ]
Liu, F. [2 ]
Yang, X. Q. [1 ]
Fan, Y. [1 ]
Zhang, C. H. [3 ]
Liu, A. M. [3 ]
机构：
[1] China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Jiangsu, Peoples R China
[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710016, Shaanxi, Peoples R China
[3] Jiangsu Hehao Laser Sci & Technol Co Ltd, Zhangjiagang 215600, Jiangsu, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 622卷
关键词：
Normal growth; Abnormal growth; Undercooling; Ni-10at.%Fe alloy; SOLUTE DRAG; NONEQUILIBRIUM SOLIDIFICATION; BOUNDARY SEGREGATION; RAPID SOLIDIFICATION; NI-ALLOYS; MELTS; REFINEMENT; SUPERALLOY; MODEL; SIZE;
D O I：
10.1016/j.jallcom.2014.11.014
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of solid-state grain growth mechanism on the microstructure evolution was investigated by employing the glass fluxing technique in undercooled Ni-10at.%Fe alloy. The continuous phenomenon of grain size refinement, coarsening and refinement with undercooling (Delta T) was found and corresponded to different mechanism of grain growth after recrystallization: normal growth (Delta T < 70 K) -> abnormal growth (70 K < Delta T < 180 K) -> normal growth (Delta T > 180 K). Applying the calculation of stress accumulation model after rapid solidification, the influence of Delta T on the driving force of grain growth was analyzed. In combination of the solute trapping model of undercooled melt and solute drag model of solid-state grain growth, the relationship between Delta T and drag force was proposed. Finally, the mechanism of alternant grain growth with Delta T was studied. (C) 2014 Published by Elsevier B.V.
引用
收藏
页码：1086 / 1092
页数：7
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