期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 55, 期 -, 页码 33-42出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2013.04.021
关键词
Severe shot peening; Steel X70; Nanocrystallization; Fatigue strength; Residual stress
资金
- Scientific Grant Agency of the Ministry of Education, Science and Sports of the Slovak Republic
- Slovak Academy of Sciences [1/0743/12]
The so called severe plastic deformation (SPD) processes are object of increasing interest due to their ability to obtain a nanostructured surface layer of material with supposed superior properties. Among these processes, severe shot peening (SSP) is very attractive from an industrial point of view, due to its versatility and wide applicability. In this study the X70 microalloyed steel is considered and treated by severe shot peening. Fatigue tests were performed to assess how SSP treatment affects the fatigue behavior of this steel. Roughness and X-ray diffraction residual stress measurements as well as microscopy observations have been carried out on the treated specimens. Rotating bending fatigue tests at room temperature on smooth and notched specimens were performed to evaluate the effect of the treatment on fatigue strength. Fracture surfaces have been then observed by scanning electron microscopy. The results were compared with the ones of a series of not peened specimens and another series of specimens shot peened with conventional parameters and interpreted by considering the characteristics of the nanostructured layer, the induced residual stresses and the surface work hardening. The comparison shows a very significant fatigue strength improvement for severely shot peened specimens, especially for the notched specimens. (c) 2013 Elsevier Ltd. 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