Fatigue crack initiation behavior of welded AA5083 in a seawater environment

被引：6

作者：

Benedictus-deVries, S

Bakker, A

Janssen, GCAM

de Wit, H

机构：

[1] Netherlands Inst Met Res, NL-2628 AL Delft, Netherlands

[2] Delft Univ Technol, Dept Mat Sci & Technol, NL-2600 AA Delft, Netherlands

来源：

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME | 2004年 / 126卷 / 02期

关键词：

corrosion fatigue; seawater; fatique limit; fatigue initiation; aluminum; weldments;

D O I：

10.1115/1.1651098

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Aluminum Alloy 5083 is increasingly used in the ship building industry due to its excellent corrosion resistance and its favorable mechanical properties. A significant application of this alloy is in high speed ferries, where the influence of dynamic loads is of great importance as well. However, the influence of a corrosive environment and/or a welded condition on the fatigue properties of nautical aluminum alloys has been studied only superficially. In the present paper the influence of a seawater environment in combination with a welded state is described. Both fatigue limits and SN-curves are given, as well as a fracture surface analysis. From these results the fracture and crack initiation mechanisms are explained. Particularly the penetration of seawater into sub-surface pores, that are present in the welded material, results in a significant drop in fatigue life time when the welded alloy is tested in seawater.

引用

页码：199 / 203

页数：5

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