使用超音速等离子喷涂设备在1045钢基体上制备了铁基合金涂层.以球盘式接触疲劳试验机为平台,研究了涂层接触疲劳损伤过程中声发射特征参数的变化规律,并分析了涂层的接触疲劳损伤机理.结果表明,在转速为2500r/min和应力水平为1.58GPa实验条件下,点蚀是涂层的主要失效形式,表现为在涂层磨痕轨迹范围内出现大量的点蚀坑,点蚀坑深度为20～30μm.涂层表面粗糙的微凸体与轴承球滚压接触产生黏着磨损,以及涂层、磨粒、滚动轴承三者形成三体磨料磨损是点蚀失效产生的主要原因.声发射幅值、有效值(Root Mean Square,RMS)、能量、计数和平均频率对涂层表面粗糙微凸体去除、弹塑性变形、裂纹萌生、裂纹稳定扩展和失稳扩展过程比较敏感,并且在不同的疲劳损伤阶段具有不同的信号反馈特点.
参考文献
| [1] | 徐滨士.再制造工程基础及应用[M].哈尔滨:哈尔滨工业大学出版社,2005 |
| [2] | 王韶云,李国禄,王海斗,刘金海,徐滨士,朴钟宇.微缺陷对热喷涂涂层接触疲劳性能的影响[J].材料工程,2012(02):72-76. |
| [3] | S. Zhu;B. Xu;J. Yao .High Quality Ceramic Coatings Sprayed by High Efficiency Hypersonic Plasma Spraying Gun[J].Materials Science Forum,2005(Pt.5):3981-3984. |
| [4] | 朴钟宇,徐滨士,王海斗,濮春欢.等离子喷涂铁基涂层的接触疲劳失效机理研究[J].材料工程,2009(11):69-73. |
| [5] | Chee Keong Tan;David Mba .Identification of the acoustic emission source during a comparative study on diagnosis of a spur gearbox[J].Tribology International,2005(5):469-480. |
| [6] | J. Meriaux;M. Boinet;S. Fouvry;J. C. Lenain .Identification of fretting fatigue crack propagation mechanisms using acoustic emission[J].Tribology International,2010(11):2166-2174. |
| [7] | D. Mba;Raj B. K. N. Rao .Development of Acoustic Emission Technology for Condition Monitoring and Diagnosis of Rotating Machines: Bearings, Pumps, Gearboxes, Engines, and Rotating Structures[J].The Shock and Vibration Digest,2006(1):3-16. |
| [8] | Energy Index technique for detection of Acoustic Emissions associated with incipient bearing failures[J].Applied acoustics,2010(9):P.812. |
| [9] | A.W. Warren;Y.B. Guo .Acoustic emission monitoring for rolling contact fatigue of superfinished ground surfaces[J].International Journal of Fatigue,2007(4):603-614. |
| [10] | PIAO Z Y;XU B S;WANG H D et al.Investigation of fatigue prediction of Fe-Cr alloy coatings under rolling contact based on acoustic emission technique[J].Applied Surface Science,2011,257(07):2581-2586. |
| [11] | Zhang Zhi-qiang;Li Guo-lu;Wang Hai-dou;Xu Bin-shi;Piao Zhong-yu;Zhu Li-na.Investigation of rolling contact fatigue damage process of the coating by acoustics emission and vibration signals[J].Tribology International,2012:25-31. |
| [12] | Miguel JM.;Guilemany JM.;Mellor BG.;Xu YM. .Acoustic emission study on WC-Co thermal sprayed coatings[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):55-63. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%