Failure Analysis of a Diesel Engine Crankshaft

doi:10.1515/pm-2021-0020

IMR OpenIR

	Failure Analysis of a Diesel Engine Crankshaft
	Zhang, H. Y.; Qu, S.; Dong, C.; Fu, C. M.; Zang, Q. S.; Zhang, Z. F.
通讯作者	Zhang, H. Y.(zhanghaoyang@imr.ac.cn)
	2021
发表期刊	PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY
ISSN	0032-678X
卷号	58 期号:5 页码:282-298
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.
关键词	Crankshaft Fatigue failure Widmannstatten Alloy segregation bands
DOI	10.1515/pm-2021-0020
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000652824800004
出版者	WALTER DE GRUYTER GMBH
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/160975
专题	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.