Failure Analysis of a Diesel Engine Crankshaft | |
Zhang, H. Y.; Qu, S.; Dong, C.; Fu, C. M.; Zang, Q. S.; Zhang, Z. F. | |
刊名 | PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY |
2021 | |
卷号 | 58期号:5页码:282-298 |
关键词 | Crankshaft Fatigue failure Widmannstatten Alloy segregation bands |
ISSN号 | 0032-678X |
DOI | 10.1515/pm-2021-0020 |
通讯作者 | Zhang, H. Y.(zhanghaoyang@imr.ac.cn) |
英文摘要 | A six-cylinder crankshaft in a 12L diesel engine was locked after testing for about 840 hours in the bench test. The fractography investigation indicates that fatigue is the dominant failure mechanism of the crankshaft. It is found that the fatigue crack mainly initiated at the fillet of the crank-web between the 6th main journal and 6th crankpin. The fatigue crack initiation area lies outside the induction surface hardened zone. From detailed metallographic inspection, abnormal microstructure containing Widmannstatten was found in the fatigue crack initiation area and the 5th main journal, while that was not found at the severely deformed crankweb. Since the region containing Widmannstatten has lower hardness, the root cause of the failure may be that the abnormal microstructure lowered the fatigue strength at the stress concentrated fillet. The crankshaft prematurely fractured under the complex stress condition in the bench test. |
WOS研究方向 | Metallurgy & Metallurgical Engineering |
语种 | 英语 |
出版者 | WALTER DE GRUYTER GMBH |
WOS记录号 | WOS:000652824800004 |
内容类型 | 期刊论文 |
源URL | [http://ir.imr.ac.cn/handle/321006/160973] |
专题 | 金属研究所_中国科学院金属研究所 |
通讯作者 | Zhang, H. Y. |
作者单位 | Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, H. Y.,Qu, S.,Dong, C.,et al. Failure Analysis of a Diesel Engine Crankshaft[J]. PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY,2021,58(5):282-298. |
APA | Zhang, H. Y.,Qu, S.,Dong, C.,Fu, C. M.,Zang, Q. S.,&Zhang, Z. F..(2021).Failure Analysis of a Diesel Engine Crankshaft.PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY,58(5),282-298. |
MLA | Zhang, H. Y.,et al."Failure Analysis of a Diesel Engine Crankshaft".PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY 58.5(2021):282-298. |
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