Evolution of Residual Stresses in Micro-arc Oxidation Ceramic Coatings on 6061 Al Alloy
文献类型：期刊论文
| 作者 | Shen Dejiu2; Cai Jingrui2; Guo Changhong2; Liu Peiyu1 |
| 刊名 | Chinese Journal of Mechanical Engineering
 |
| 出版日期 | 2013-01-01 |
| 卷号 | 26期号:6页码:1149 |
| ISSN号 | 1000-9345 |
| 英文摘要 | Most researches on micro-arc oxidation mainly focus on the application rather than discovering the evolution of residual stresses. However, residual stresses in the surface coatings of structural components have adverse effects on their properties, such as fatigue life, dimensional stability and corrosion resistance, etc. The micro-arc oxidation ceramic coatings are produced on the surfaces of 6061 aluminum alloy by a homemade asymmetric AC type of micro-arc oxidation equipment of 20 kW. A constant current density of 4.4 +/- 0.1 A/dm(2) and a self-regulated composite electrolyte are used. The micro-arc oxidation treatment period ranges from 10 min to 40 min, and the thickness of the ceramic coatings is more than 20 mu m. Residual stresses attributed to gamma-Al2O3 constituent in the coatings at different micro-arc oxidation periods are analyzed by an X-ray diffractometer using the sin(2)psi method. The analysis results show that the residual stress in the ceramic coatings is compressive in nature, and it increases first and then decreases with micro-arc oxidation time increase. The maximum stress value is 1 667 +/- 20 MPa for period of 20 min Through analyzing the coating thickness, surface morphology and phase composition, it is found that the residual stress in the ceramic coatings is linked closely with the coating growth, the phase composition and the micro cracks formed. It is also found that both the heat treatment and the ultrasonic action release remarkably the residual compressive stress. The heat treatment makes the residual compressive stress value decrease 1 378 MPa. The ultrasonic action even alters the nature of the residual stress, making the residual compressive stress change into a residual tensile stress. |
| 资助项目 | [National Natural Science Foundation of China] ; [Hebei Provincial Natural Science Foundation of China] |
| 语种 | 英语 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/176803]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.中国科学院大连化学物理研究所 2.燕山大学 |
| 推荐引用方式 GB/T 7714 | Shen Dejiu,Cai Jingrui,Guo Changhong,et al. Evolution of Residual Stresses in Micro-arc Oxidation Ceramic Coatings on 6061 Al Alloy[J]. Chinese Journal of Mechanical Engineering,2013,26(6):1149. |
| APA | Shen Dejiu,Cai Jingrui,Guo Changhong,&Liu Peiyu.(2013).Evolution of Residual Stresses in Micro-arc Oxidation Ceramic Coatings on 6061 Al Alloy.Chinese Journal of Mechanical Engineering,26(6),1149. |
| MLA | Shen Dejiu,et al."Evolution of Residual Stresses in Micro-arc Oxidation Ceramic Coatings on 6061 Al Alloy".Chinese Journal of Mechanical Engineering 26.6(2013):1149. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。