| 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 | |
| Corresponding Author | Qu, S.(squ@imr.ac.cn) |
| 2022-12-01 | |
| Source Publication | ENGINEERING FAILURE ANALYSIS
 |
| ISSN | 1350-6307 |
| Volume | 142Pages:11 |
| Abstract | 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. |
| Keyword | Stirling engine Cooler 316L Hydrogen environment embrittle Bright annealing |
| Funding Organization | Institute of Metal Research, Chinese Academy of Sciences |
| DOI | 10.1016/j.engfailanal.2022.106827 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Institute of Metal Research, Chinese Academy of Sciences |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Mechanical ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000869905600001 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/176277 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Qu, S. |
| Affiliation | 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 |
| Recommended Citation 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. |
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