Thermal Fatigue Cracking Phenomenon in Engine Valve Seat Insert

被引：0

作者：

Qiao, Congyue P. ^{[1
]}

机构：

[1] LE Jones Co, Menominee, MI 49858 USA

来源：

JOURNAL OF FAILURE ANALYSIS AND PREVENTION | 2023年 / 23卷 / 06期

关键词：

Thermal fatigue cracking; IC engine; Valve seat insert; Wear-resistant alloys; Physical property; Mechanical property; Residual stress;

D O I：

10.1007/s11668-023-01793-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermal fatigue phenomenon of internal combustion engine valve seat insert (VSI) is discussed. Metallographic, microhardness mapping, and fractographic-assisted examinations along with residual stress analysis have exhibited basic characteristics of VSI thermal fatigue cracking. Based upon the results from dynamometer engine tested parts examination, the mechanism of VSI thermal fatigue crack initiation and propagation has been established. It is revealed that the propensity of a VSI thermal fatigue crack formation is related to physical and mechanical properties of VSI alloy, solidification substructure, and temperature gradient in VSI under an engine run operation condition. The assessment concept of thermal fatigue crack resistance of a VSI in this study can be adopted for engine VSI design and materials failure analysis applications.

引用

页码：2640 / 2647

页数：8