The chemistry of precipitates in an aged Al-2.1Zn-1.7Mg at.% alloy

被引：113

作者：

Maloney, SK ^{[1
]}

Hono, K

Polmear, IJ

Ringer, SP

机构：

[1] Monash Univ, Dept Mat Engn, Clayton, Vic 3168, Australia

[2] Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan

来源：

SCRIPTA MATERIALIA | 1999年 / 41卷 / 10期

基金：

澳大利亚研究理事会;

关键词：

aluminium alloys; three dimensional atom probe; transmission electron microscopy; Al-Zn-Mg alloys; precipitation;

D O I：

10.1016/S1359-6462(99)00253-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A combination of transmission electron microscopy (TEM) and three-dimensional atom probe (3DAP) was used to examine the precise compositions of precipitates in a high-purity, ternary Al-Zn-Mg alloy. Samples for atom probe were prepared by electro-polishing the wire initially in nitric acid containing a few drops of water and then in a solution of 2% perchloric acid in 2-butoxyethanol to sharpen the tips. Three dimensional atom probe analysis was carried out at 25K with a pulse fraction of 20% in an ultra high vacuum of 1.3 × 10-10 mbar. The data was analyzed to confirm the presence of coherent Guinier-Preston (G.P.) zones in the alloy.

引用

页码：1031 / 1038

页数：8

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