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

被引：44

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

页码：2585 / 2598

页数：14

共 49 条

[11] Microscopic computer simulations of directional coarsening in face-centered cubic alloys [J].

Gupta, H ;

Weinkamer, R ;

Fratzl, P ;

Lebowitz, JL .

ACTA MATERIALIA, 2001, 49 (01) :53-63

[12] THE DENDRITIC GROWTH OF GAMMA'-PRECIPITATES AND GRAIN-BOUNDARY SERRATION IN A MODEL NICKEL-BASE SUPERALLOY [J].

HENRY, MF ;

YOO, YS ;

YOON, DY ;

CHOI, J .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1993, 24 (08) :1733-1743

[13] A phase-field model for evolving microstructures with strong elastic inhomogeneity [J].

Hu, SY ;

Chen, LQ .

ACTA MATERIALIA, 2001, 49 (11) :1879-1890

[14] ELASTIC INTERACTION ENERGY OF 2 SPHERICAL PRECIPITATES IN AN ANISOTROPIC MATRIX [J].

JOHNSON, WC ;

LEE, JK .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1979, 10 (08) :1141-1149

[15] PRECIPITATE SHAPE TRANSITIONS DURING COARSENING UNDER UNIAXIAL-STRESS [J].

JOHNSON, WC ;

BERKENPAS, MB ;

LAUGHLIN, DE .

ACTA METALLURGICA, 1988, 36 (12) :3149-3162

[16] ELASTIC INTERACTION AND STABILITY OF MISFITTING CUBOIDAL INHOMOGENEITIES [J].

JOHNSON, WC ;

VOORHEES, PW .

JOURNAL OF APPLIED PHYSICS, 1987, 61 (04) :1610-1619

[17]

Khachaturyan A. G., 1983, THEORY STRUCTURAL TR

[18] THEORETICAL-ANALYSIS OF STRAIN-INDUCED SHAPE CHANGES IN CUBIC PRECIPITATES DURING COARSENING [J].

KHACHATURYAN, AG ;

SEMENOVSKAYA, SV ;

MORRIS, JW .

ACTA METALLURGICA, 1988, 36 (06) :1563-1572

[19]

KHACHATURYAN AG, 1969, FIZ TVERD TELA+, V11, P118

[20] Three-dimensional analysis of proeutectoid cementite precipitates [J].

Kral, MV ;

Spanos, G .

ACTA MATERIALIA, 1999, 47 (02) :711-724

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