Competitive grain growth mechanism in three dimensions during directional solidification of a nickel-based superalloy

被引：24
|
作者：
Yang, Chubin [1 ]
Liu, Lin [1 ]
Zhao, Xinbao [1 ]
Wang, Ning [1 ]
Zhang, Jun [1 ]
Fu, Hengzhi [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 578卷
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
High-temperature alloys; Microstructure; Competitive growth; Crystal orientation; SINGLE-CRYSTAL SUPERALLOYS; SEED MELT-BACK; FRECKLE FORMATION; MODEL; PREDICTION; ORIENTATION; SIMULATION; MICROSTRUCTURES;
D O I：
10.1016/j.jallcom.2013.07.006
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：
Stray grains with random orientations were observed at the diverging < 0 0 1 > corner of the mold wall in the directionally solidified single crystal superalloy AM3. An experimental study, together with the simulation of the ProCAST software, was conducted to investigate the mechanism of competitive growth during the directional solidification with bi-crystal. Based on the results of the experiments and simulations, it was proposed that the factor contributing to the competitive growth was the rotation angle of the unfavorably oriented grain. (c) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：577 / 584
页数：8
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