PROPERTIES AND MICROSTRUCTURE OF ALUMINUM-COPPER-MAGNESIUM-LITHIUM ALLOYS

被引：19

作者：

WEBSTER, D

机构：

[1] Lockheed Missiles and Space Co., Sunnyvale, 94086, CA

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1979年 / 10卷 / 12期

关键词：

D O I：

10.1007/BF02811737

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and mechanical properties of Al-Cu-Mg-Li alloy extrusions prepared from both rapidly cooled powder flakes and cast ingots have been determined. Embrittlement of the alloys by lithium was observed in both powder source and ingot source metarial. Fracture in all the powder source alloys was partly transgranular and partly along the boundaries of the original powder flakes. In the ingot source Al 2024 the fracture was transgranular but the addition of lithium changed the fracture path to predominantly integranular. The fatigue crack growth rate of powder source Al 2024 with and without lithium was found to be five to ten times slower than the growth rate of ingot source Al 2024. © 1979 American Society for Metals and the Metallurgical Society of AIME.

引用

页码：1913 / 1921

页数：9