Failure Analysis of Internal Combustion Exhaust Valve

DOI

10.2991/asei-15.2015.47How to use a DOI?

Keywords

Corrosion; Internal combustion valves; adhesive wear; Oxidative;

Abstract

The exhaust valves system is very important for internal combustion engines and experienced severe physical and chemical environment including frequent impact, high and varying temperature, exhaust gas’ chemical corrosion and deposition of fine dust, et al. This paper presents a failure analysis of two new internal combustion exhaust valves used not more than 200 houses. The fracture surfaces were investigated by SEM and optical microscope. And EDS was used the clarified the related chemical elements. Results of present investigation showed that instability of oxidation film that formatted on the seal face during the early stage, was a crucial factor of the failure. In this case, the film was thin and porous, so high temperature exhaust gas could reaction with matrix welding layer. Consequently, the welding layer loses its wear resistant property during the subsequence service procedure.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yanpeng Feng
AU  - Haijun Tang
AU  - Chunguang Li
AU  - Xiaoming Ma
AU  - Mingli Xie
PY  - 2015/05
DA  - 2015/05
TI  - Failure Analysis of Internal Combustion Exhaust Valve
BT  - Proceedings of the 2015 International conference on Applied Science and Engineering Innovation
PB  - Atlantis Press
SP  - 228
EP  - 231
SN  - 2352-5401
UR  - https://doi.org/10.2991/asei-15.2015.47
DO  - 10.2991/asei-15.2015.47
ID  - Feng2015/05
ER  -