The effects of elastic stress on microstructural development:: the three-dimensional microstructure of a γ-γ′ alloy

被引：42
作者：
Lund, AC [1 ]
Voorhees, PW [1 ]
机构：
[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
来源：
ACTA MATERIALIA | 2002年 / 50卷 / 10期
基金：
美国国家科学基金会;
关键词：
phase transformations; precipitation; growth; microstructure; scanning electron microscopy (SEM); image analysis;
D O I：
10.1016/S1359-6454(02)00087-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the three-dimensional structure of a model gamma-gamma' alloy using serial sectioning and digital reconstruction. The particles align in parallel two-dimensional sheets along the <100> crystallographic directions. The sheets in different regions of the microstructure are aligned along different <100> crystallographic directions. A variety of particle morphologies are observed. These morphologies are relatively independent of particle size. indicating a significant departure from single-particle equilibrium morphologies. The primary determinant of particle morphology appears to be the interparticle elastic interactions, both within sheets of particles and at the intersections of sheets. There is no evidence of particle coalescence despite the small interparticle separation. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：2585 / 2598
页数：14
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