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Cause analysis of the cooler leakage in a stirling engine

文献类型：期刊论文

作者Zhang, H. Y.1; Xu, W.2; Zhu, T. Y.2; Qu, S.1; Wang, X. G.1; Dong, C.1; Zhang, Z. F.1
刊名ENGINEERING FAILURE ANALYSIS
出版日期2022-12-01
卷号142页码:11
ISSN号1350-6307
关键词Stirling engine Cooler 316L Hydrogen environment embrittle Bright annealing
DOI10.1016/j.engfailanal.2022.106827
通讯作者Qu, S.(squ@imr.ac.cn)
英文摘要After a stirling engine operated for 1750 h, the cooler in the engine was found leaking. The leakage led to a rapid decrease of the cycle efficiency. After dismantling, a cooling tube was found leaked by air pressure test. Through macro- and microscopic fracture morphologies, the cause of the leakage was determined as fatigue under alternating stress during operation, but the fatigue source region shows abnormal brittle fracture morphologies. By XRT and inner wall inspections, more cracks initiated from the extrusion bands on the inner wall, and F-containing lubricant was also detected there. Considering the fabrication process of the tube, the formation mechanism of the inner cracks is determined as hydrogen environment embrittlement (HEE) under the conditions of the local surface damage, deformed microstructure and pure hydrogen circumstance during bright annealing. Remedial methods are also proposed to increase the service life and service safety.
资助项目Institute of Metal Research, Chinese Academy of Sciences
WOS研究方向Engineering ; Materials Science
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000869905600001
资助机构Institute of Metal Research, Chinese Academy of Sciences
源URL[http://ir.imr.ac.cn/handle/321006/176273]  
专题金属研究所_中国科学院金属研究所
通讯作者Qu, S.
作者单位1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Shanghai Marine Diesel Engine Res Inst, Shanghai 201108, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, H. Y.,Xu, W.,Zhu, T. Y.,et al. Cause analysis of the cooler leakage in a stirling engine[J]. ENGINEERING FAILURE ANALYSIS,2022,142:11.
APA Zhang, H. Y..,Xu, W..,Zhu, T. Y..,Qu, S..,Wang, X. G..,...&Zhang, Z. F..(2022).Cause analysis of the cooler leakage in a stirling engine.ENGINEERING FAILURE ANALYSIS,142,11.
MLA Zhang, H. Y.,et al."Cause analysis of the cooler leakage in a stirling engine".ENGINEERING FAILURE ANALYSIS 142(2022):11.

入库方式： OAI收割

来源：金属研究所

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