Quick Search:       Advanced Search
黄丰,聂铭,林介东,华旭,陈国锋,周忠娇.应变幅和相角度对热障涂层材料系统热机械疲劳性能的影响[J].稀有金属材料与工程(英文),2017,46(12):3693~3698.[Huang Feng,Nie Ming,Lin Jiedong,Hua xU,Chen Guofeng,Zhou Zhongjiao.The Effect of Strain Range and Phase Angles on the Thermomechanical Fatigue Properties of Thermal Barrier Coating System[J].Rare Metal Materials and Engineering,2017,46(12):3693~3698.]
The Effect of Strain Range and Phase Angles on the Thermomechanical Fatigue Properties of Thermal Barrier Coating System
Download Pdf  View/Add Comment  Download reader
Received:January 18, 2016  Revised:April 26, 2016
DOI:
Key words: Ni-base superalloy  thermal barrier coatings  thermomechanical fatigue cracks  lifetime model
Foundation item:
Author NameAffiliationE-mail
Huang Feng (1. Guangdong Power Grid Co., Ltd., Electric Power Research Institute huanfen777@126.com 
Nie Ming 广东电网有限责任公司电力科学研究院  
Lin Jiedong 广东电网有限责任公司电力科学研究院  
Hua xU 西门子(中国)研究院  
Chen Guofeng 西门子(中国)研究院  
Zhou Zhongjiao 清华大学机械工程系 zhouzhongjiao2006@163.com 
Hits: 176
Download times: 
Abstract:
      As the key material of components used in elevated temperature of gas turbines, the mechanism of delamination and failure of thermal barrier coatings (TBCs) under service conditions has been the hot spot of research for a long time. The influences of strain ranges and phase angles on the thermomechanical fatigue (TMF) properties of samples with thermal barrier coatingsTBCs were investigated in this paper. It was is shown that under the same phase angles, the TMF lifetime decreased decreases with the increase of strain ranges. Under the same strain range, the in-phase tests had have longer TMF lifetime than out-of-phase tests. In both samples, cracks were are initiated in thermally grown oxide (TGO) layer, and then propagated along the bond coat/ceramic top coat, forming the delamination cracks. When the delamination cracks connected with the segmentation cracks initiated in ceramic coat, the TBCs spalled. A TMF lifetime model concerning strain ranges and phase angles was is established, and an exponential law exists between TMF lifetime and the maximum stress