Reduction in the thermodynamic nucleation barrier via the heteroepitaxial recrystallization mechanism

被引：7
作者：
Miller, V. M. [1 ,2 ,3 ]
Payton, E. J. [1 ]
Pilchak, A. L. [1 ]
机构：
[1] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA
[2] UES Inc, 4401 Dayton Xenia Rd, Beavercreek, OH USA
[3] North Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA
来源：
SCRIPTA MATERIALIA | 2017年 / 136卷
关键词：
Recrystallization; Superalloy; Nucleation; Elastic misfit; Thermomechanical processing; Grain size; ABNORMAL GRAIN-GROWTH; ELASTIC FIELD; STRAIN; DEFORMATION;
D O I：
10.1016/j.scriptamat.2017.04.018
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A new recrystallization mechanism characterized by the formation of a coherent gamma shell around a primary gamma' particle has been reported in superalloys [Charpagne et al.J. Alloy Compd. 688 (Part B) (2016) 685-694]. In the present work, the thermodynamics of nucleation by this mechanism are investigated, considering the stored deformation energy, interfacial energy, and elastic misfit. It is demonstrated that under realistic conditions, growth of any nucleus formed on a primary gamma' particle is thermodynamically favorable regardless of size. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：128 / 131
页数：4
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