VOID NUCLEATION IN A QUATERNARY AL-LI ALLOY

被引：12
|
作者：
BUTLER, EP [1 ]
OWEN, NJ [1 ]
FIELD, DJ [1 ]
机构：
[1] UNIV LONDON IMPERIAL COLL SCI & TECHNOL,DEPT MET & MAT SCI,LONDON SW7 2AZ,ENGLAND
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 1985年 / 1卷 / 07期
关键词：
AEROSPACE ENGINEERING - Materials - AIRCRAFT MATERIALS - Light Metals - ALUMINUM LITHIUM ALLOYS - FATIGUE OF MATERIALS - METALS TESTING - Tensile Tests;
D O I：
10.1179/mst.1985.1.7.531
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Void nucleation at second-phase particles has been studied in round-notched, cylindrical tensile specimens of an ingot-cast Al-Li quaternary alloy. The volume fraction and distribution of voids has been determined as a function of strain history for samples in the solution-treated, peak-aged, and overaged conditions, and values of the stress to form cavitation calculated. The intermetallic phase responsible for void nucleation has been identified as being Fe- and Cu-rich; voids nucleate following the fracture of these particles. A mechanism of failure is proposed based on stress concentration at the particle/matrix interface where coplanar slip bands impinge.
引用
收藏
页码：531 / 536
页数：6
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