Crack Analysis Of A Gasoline Engine Crankshaft

被引：0
|
作者：
Keskin, Ali [1 ]
Aydin, Kadir [2 ]
机构：
[1] Mersin Univ, Tarsus Tech Educ Fac, TR-33480 Tarsus Mersin, Turkey
[2] Cukurova Univ, Fac Engn & Architecture, Dept Mech Engn, TR-01330 Adana, Turkey
来源：
GAZI UNIVERSITY JOURNAL OF SCIENCE | 2010年 / 23卷 / 04期
关键词：
Crankshaft failure; Cracks; Thermal fatigue; Automotive failures;
D O I：
暂无
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
In this study, failure analysis of a crankshaft was carried out. The crankshaft made of nodular graphite cast iron was used in a gasoline engine. The cracks propagated axially on surface of the 4th pin journal. Microscopic observation was conducted on the surface of journals. Mechanical and metallurgical properties of the crankshaft including chemical composition, micro-hardness, tensile properties and roughness were studied and compared with the specified properties of the crankshaft materials. As a result of the analyses, the main reason of failure was determined as thermal fatigue because of contact of journal and bearing surface. This condition leads to the formation and growth of fatigue cracks. The contact is probably resulted from defective lubrication or high operating oil temperature. In addition, the contact caused scratches on surface of the 4th pin journal and 5th main journal.
引用
收藏
页码：487 / 492
页数：6
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