Role of vacancy-solute complex in the initial rapid age hardening in an Al-Cu-Mg alloy

被引：148

作者：

Nagai, Y ^{[1
]}

Murayama, M

Tang, Z

Nonaka, T

Hono, K

Hasegawa, M

机构：

[1] Tohoku Univ, Inst Mat Res, Oarai Branch, Oarai, Ibaraki 3111313, Japan

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

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

ACTA MATERIALIA | 2001年 / 49卷 / 05期

关键词：

probe methods-positron; transmission electron microscopy (TEM); alloys-aluminium; aging lattice defects-vacancy;

D O I：

10.1016/S1359-6454(00)00348-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the origin of the initial rapid hardening of an Al-1.3 at .% Mg-1.7 at .% Cu alloy by coincidence Doppler broadening of positron annihilation radiation and positron lifetime spectroscopy. Quenched-in vacancies are bound to Mg atoms rather than Cu atoms initially and the vacancy-Mg complexes easily migrate to vacancy sinks at 150 degreesC. Vacancy-Mg-Cu complexes form during the initial 1 min aging at vacancy sinks, meanwhile vacancy density decreases rapidly. These results support that the dislocation-solute interaction is the origin of the initial rapid hardening. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：913 / 920

页数：8

共 27 条

[1] IDENTIFICATION OF VACANCY DEFECTS IN COMPOUND SEMICONDUCTORS BY CORE-ELECTRON ANNIHILATION - APPLICATION TO INP [J].