期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.03.026
关键词
Austenitic stainless steel; Corrosion fatigue; Oxidation; Nanoindentation
类别
资金
- 863 Program of China [2012AA03A507]
The effect of oxidation behavior on the corrosion fatigue crack initiation and propagation of 316LN austenitic stainless steel (SS) in 320 degrees C water and air environments was investigated by corrosion fatigue cracking test system, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and nanoindentation. The experimental results indicated that the cracks were found to be initiated at first 20% of fatigue life of the specimens tested in 320 degrees C water, while only a few cracks were found until fracture when tested in 320 degrees C air. The crack propagation rates of the specimens tested in 320 degrees C water were obviously faster than those tested in 320 degrees C air especially at lower strain amplitude of +/- 0.5%. This can be attributed to the oxidation behavior of the 316LN SS specimens tested in 320 degrees C water was more serious than those tested in 320 degrees C air. The compositions were more complex of the oxide films formed in 320 degrees C water than those tested in 320 degrees C air, which lead to crack initiation easier in the former. Moreover, the 320 degrees C water made the mechanical properties of the oxide films worse, resulting in a faster fatigue crack propagation rate at crack tip. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据