The effect of copper addition on the structure and strength of an Al-Li alloy

被引：6

作者：

Kabisch, O

Gille, W

Krol, J

机构：

[1] Martin Luther Universitat Halle Wittenberg, D-06120 Halle, Germany

[2] Polish Acad Sci, A Krupkowski Inst Met & Mat Sci, PL-30059 Krakow, Poland

来源：

MATERIALS & DESIGN | 1997年 / 18卷 / 4-6期

关键词：

copper; AL-Li; structure; strength;

D O I：

10.1016/S0261-3069(97)00080-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study the effect of copper addition on the structure, precipitation kinetics and hardness in the Al-Li and Al-Li-Cu alloys aged at 200 degrees C was investigated. The structures of precipitates were studied using X-ray-small-angle-scattering (XSAS) and transmission electron microscopy (TEM) methods. The changes in the structure parameter (Rg) of both alioys was calculated using two methods, the Guinier approximation and correlation function gamma(r). By use of a plot of r gamma(r) the distribution law of the T-1 disc thickness was obtained and the coexisting spherical particles of delta' were estimated. Two types of delta' precipitates of approximately 2 nm size and above 8 nm and the T-1 precipitates of thickness between 3 and 4 nm were observed. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.

引用

页码：385 / 388

页数：4