Influence of salt corrosion on the fatigue behaviour of aluminium alloys for chassis components under constant and variable amplitude loading

被引：4
|
作者：
de Araujo, F. Duarte [1 ]
Engler, T. [2 ]
Andersohn, G. [2 ]
Oechsner, M. [2 ]
Kaufmann, H. [3 ]
Schoenborn, S. [3 ]
Melz, T. [3 ]
机构：
[1] Tech Univ Darmstadt, Res Grp Syst Reliabil Adapt Struct & Machine Acou, Magdalenenstr 4, D-64289 Darmstadt, Germany
[2] Tech Univ Darmstadt, Ctr Engn Mat, State Mat Testing Inst Darmstadt MPA, Chair & Inst Mat Technol IfW, Grafenstr 2, D-64293 Darmstadt, Germany
[3] Fraunhofer Inst Struct Durabil & Syst Reliabil LB, Bartningstr 47, D-64289 Darmstadt, Germany
来源：
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK | 2018年 / 49卷 / 03期
关键词：
Corrosion fatigue; aluminium alloys; salt corrosion; assessment; safety components;
D O I：
10.1002/mawe.201700180
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper presents an approach to assessing the cumulative fatigue under spectrum loading and simultaneous salt corrosion for aluminium alloys. Fatigue tests, in air and in 5 % sodium chloride solution, were performed with two different structural aluminium alloys (EN AW-6082 T6 and EN AW-7075 T73) using unnotched and notched specimens. The alloy EN AW-7075 T73 proved to be unsuitable for automotive applications due to its high susceptibility to corrosion. For fatigue lifing, a modified cumulative damage calculation based on the material susceptibility, which comprises the influence of salt corrosion on fatigue lifetime, has been proposed. On this basis, potential structural aluminium alloys for chassis applications can be evaluated and selected, prior to validation tests.
引用
收藏
页码：273 / 286
页数：14
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