THE MICROSTRUCTURE AND MECHANISM OF FATIGUE CRACK INITIATION OF 2024-T3 AND 2524-T34 ALUMINUM ALLOYS

被引：0

作者：

Li, T. ^{[1
]}

Wang, Q. Y. ^{[2
]}

机构：

[1] SW Univ Sci & Technol, Coll Civil Engn & Architecture, Mianyang 621000, Peoples R China

[2] Sichuan Univ, Dept Engn Mech, Chengdu 610065, Peoples R China

来源：

ADVANCES IN HETEROGENEOUS MATERIAL MECHANICS 2011 | 2011年

关键词：

Aluminum alloy; micro structure; fatigue crack; fatigue crack initiation; FRACTURE-BEHAVIOR; ALUMINUM-ALLOY-2524;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The micro structure and mechanism of fatigue crack initiation of 2024-T3 and 2524-T34 Al alloys were investigated at the present paper. Four-point bending and tension-tension fatigue tests were conducted on the test alloys along the rolling direction at room temperature and frequency of 15Hz, R=0.1. It was found that the flat grain was elongated along the rolling direction, showing the laminar grain structure. The majority of fatigue cracks of 2524 were initiated at coarse particles, a few of them was formed on sites of material defects or slip bands. The intrusion and extrusion induced by slip band in the Al cladding layer provided principal fatigue crack initiation sites for 2024 Al-cladding aluminum alloys.

引用

页码：929 / +

页数：2

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