Cause analysis of the cooler leakage in a stirling engine

doi:10.1016/j.engfailanal.2022.106827

IMR OpenIR

	Cause analysis of the cooler leakage in a stirling engine
	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
通讯作者	Qu, S.(squ@imr.ac.cn)
	2022-12-01
发表期刊	ENGINEERING FAILURE ANALYSIS
ISSN	1350-6307
卷号	142 页码:11
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.
关键词	Stirling engine Cooler 316L Hydrogen environment embrittle Bright annealing
资助者	Institute of Metal Research, Chinese Academy of Sciences
DOI	10.1016/j.engfailanal.2022.106827
收录类别	SCI
语种	英语
资助项目	Institute of Metal Research, Chinese Academy of Sciences
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Characterization & Testing
WOS记录号	WOS:000869905600001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176274
专题	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.