This paper presents the failure analysis of an automobile valve spring which failed in service. The springs are originally produced from cold drawn, heat-treated and chemically/ultrasonically cleaned SAE 1065 steel. The fractured surfaces as well as the surface of the spring material close to the fractured surface were examined in a scanning electron microscope at suitable magnifications. Optical microscopy was performed to evaluate the basic microstructure of the as-received material. Detailed electron microscopic studies have indicated that the failure was due to the presence of non-metallic inclusions near the surface of the spring material.
Failure analysis of an automobile valve spring
Engineering Failure Analysis ; 8 , 6 ; 513-520
2001
8 Seiten, 10 Bilder, 6 Quellen
Aufsatz (Zeitschrift)
Englisch
VALVE SPRING DESIGN - STRESS ANALYSIS
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