Corrosion-fatigue of A1N railway axle steel exposed to rainwater

被引：85

作者：

Beretta, S. ^{[1
]}

Carboni, M. ^{[1
]}

Fiore, G. ^{[1
]}

Lo Conte, A. ^{[1
]}

机构：

[1] Politecn Milan, Dept Mech Engn, I-20156 Milan, Italy

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2010年 / 32卷 / 06期

关键词：

A1N steel; Railway axles; Corrosion pits; Corrosion-fatigue; Rainwater; STRESS INTENSITY FACTORS; CRACK-GROWTH; BEHAVIOR; DAMAGE; PROPAGATION; PREDICTION; STRENGTH; ALLOY; LIFE;

D O I：

10.1016/j.ijfatigue.2009.08.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The fatigue proper-ties of railway axle steels have not yet been thoroughly studied even though a number of axle failures are undoubtedly due to the combined effects of corrosion and fatigue. In this paper, the effects of corrosion by rainwater on the fatigue behavior of A1N steel, has been studied. The analysis of the results enabled us to establish that even the presence of a mild corrosive environment eliminates the fatigue limit, thus causing failures in the high-cycle fatigue regime (>10(6) cycles). The pit-to-crack transition and the crack propagation mechanism were then analyzed together with crack growth measurements on surface cracks. A modified Murtaza and Akid model was used to obtain the description of corrosion-fatigue crack growth data thus allowing us to obtain a conservative prediction of the S-N diagram subjected to artificial rainwater. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：952 / 961

页数：10

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