A procedure for quantification of precipitate microstructures from three-dimensional atom probe data

被引：311

作者：

Vaumousse, D ^{[1
]}

Cerezo, A ^{[1
]}

Warren, PJ ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

ULTRAMICROSCOPY | 2003年 / 95卷 / 1-4期

基金：

英国工程与自然科学研究理事会;

关键词：

precipitate quantification; analytical software method; 3-D atom probe data;

D O I：

10.1016/S0304-3991(02)00319-4

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

New analysis software for selecting and quantifying particles in three-dimensional atom maps has been designed. The selection of solute-rich regions is performed by connecting solute atoms which lie within a fixed distance (d), and taking clusters above a certain minimum number of solute atoms (N-min) Other atoms within some distance L greater than d are taken to belong to the cluster. However, this results in the inclusion of a shell of matrix atoms, which must be removed through an erosion step, to define the final cluster. Data filtered in this way can be used for subsequent quantification of parameters such as size, shape, composition, number density and volume fraction with better accuracy than by manual selection. The choice of d, N-min and L values is discussed and some methods of evaluation of these parameters are proposed. Examples are presented on the application of this new software to the analysis of early stage clustering in an Al-Mg-Si-Cu alloy and a copper-containing steel. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：215 / 221

页数：7

共 6 条

[1] THE TOMOGRAPHIC ATOM-PROBE - A QUANTITATIVE 3-DIMENSIONAL NANOANALYTICAL INSTRUMENT ON AN ATOMIC-SCALE [J].