<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The exhaust valve from marine diesel engine which was damaged after 2000 hours of service was investigated. In order to prolong the service time the valve face was cladded with cobalt base alloy using laser technique. After failure microstructural and chemical analyses reviled that cladding process was conducted improperly. The chemical composition of the clad layer was far from the designed one and what more completely inhomogeneous. As a result the valve presented different properties in different regions which led to premature failure.</p></abstract>

The exhaust valve from marine diesel engine which was damaged after 2000 hours of service was investigated. In order to prolong the service time the valve face was cladded with cobalt base alloy using laser technique. After failure microstructural and chemical analyses reviled that cladding process was conducted improperly. The chemical composition of the clad layer was far from the designed one and what more completely inhomogeneous. As a result the valve presented different properties in different regions which led to premature failure.

Failure analysis of the exhaust valve face in diesel marine engine

Faculty of Mechanical Engineering, Department of Materials Science and Engineering, Gdańsk University of Technology, Gdansk, Poland

Department of Mechanical Engineering, Gdynia Maritime University, Gdynia, Poland

Advances in Materials Science

{"article-title":"Failure analysis of the exhaust valve face in diesel marine engine"}

The exhaust valve from marine diesel engine which was damaged after 2000 hours of service was investigated. In order to prolong the service time the valve face...

Failure analysis of the exhaust valve face in diesel marine engine

Publié en ligne: 26 août 2010

Pages: 11 - 18

DOI: https://doi.org/10.2478/v10077-010-0006-0

Mots clés
cobalt base alloy, laser cladding, wear

This content is open access.

Failure analysis of the exhaust valve face in diesel marine engine

Publié en ligne: 26 août 2010

Pages: 11 - 18

DOI: https://doi.org/10.2478/v10077-010-0006-0

Mots cléscobalt base alloy, laser cladding, wear

This content is open access.

Mots clés
cobalt base alloy, laser cladding, wear