In-situ hot corrosion testing of candidate materials for exhaust valve spindles

Uffe Bihlet; Harro A. Hoeg; Kristian Vinter Dahl; Marcel A. J. Somers

In-situ hot corrosion testing of candidate materials for exhaust valve spindles

Uffe Bihlet, Harro A. Hoeg, Kristian Vinter Dahl, Marcel A. J. Somers

MAN Diesel and Turbo

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research

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Abstract

The two stroke diesel engine has been continually optimized since its invention more than a century ago. One of the ways to increase fuel efficiency further is to increase the compression ratio, and thereby the temperature in the combustion chamber. Because of this, and the composition of the fuel used, exhaust valve spindles in marine diesel engines are subjected to
high temperatures and stresses as well as molten salt induced corrosion. To investigate candidate materials for future designs which will involve the HIP process, a spindle with Ni superalloy material samples inserted in a HIPd Ni49Cr1Nb matrix has been produced, and put into service for 2,200 hours allowing a unique in-situ corrosion test. 10 high Cr alloys have
been tested this way. The corrosion appearance is found to be a factor of not only the chemical composition but also the production method. HIPd material with high Cr content and low content of Fe and Mo is found to be the best choice for hot corrosion resistance.

Original language	English
Title of host publication	Proceedings of the 2011 International Conference on Hot Isostatic Pressing
Number of pages	6
Publication date	2011
Publication status	Published - 2011
Event	HIP'11 - International Conference on Hot Isostatic Pressing 2011 - kobe, Japan Duration: 12 Apr 2011 → 14 Apr 2011

Conference

Conference	HIP'11 - International Conference on Hot Isostatic Pressing 2011
Country/Territory	Japan
City	kobe
Period	12/04/2011 → 14/04/2011

Keywords

Corrosion test
HIP
Exhaust valve spindle
Hot corrosion

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "In-situ hot corrosion testing of candidate materials for exhaust valve spindles",

abstract = "The two stroke diesel engine has been continually optimized since its invention more than a century ago. One of the ways to increase fuel efficiency further is to increase the compression ratio, and thereby the temperature in the combustion chamber. Because of this, and the composition of the fuel used, exhaust valve spindles in marine diesel engines are subjected tohigh temperatures and stresses as well as molten salt induced corrosion. To investigate candidate materials for future designs which will involve the HIP process, a spindle with Ni superalloy material samples inserted in a HIPd Ni49Cr1Nb matrix has been produced, and put into service for 2,200 hours allowing a unique in-situ corrosion test. 10 high Cr alloys havebeen tested this way. The corrosion appearance is found to be a factor of not only the chemical composition but also the production method. HIPd material with high Cr content and low content of Fe and Mo is found to be the best choice for hot corrosion resistance.",

keywords = "Corrosion test, HIP, Exhaust valve spindle, Hot corrosion",

author = "Uffe Bihlet and Hoeg, {Harro A.} and Dahl, {Kristian Vinter} and Somers, {Marcel A. J.}",

year = "2011",

language = "English",

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AU - Bihlet, Uffe

AU - Hoeg, Harro A.

AU - Dahl, Kristian Vinter

AU - Somers, Marcel A. J.

PY - 2011

Y1 - 2011

N2 - The two stroke diesel engine has been continually optimized since its invention more than a century ago. One of the ways to increase fuel efficiency further is to increase the compression ratio, and thereby the temperature in the combustion chamber. Because of this, and the composition of the fuel used, exhaust valve spindles in marine diesel engines are subjected tohigh temperatures and stresses as well as molten salt induced corrosion. To investigate candidate materials for future designs which will involve the HIP process, a spindle with Ni superalloy material samples inserted in a HIPd Ni49Cr1Nb matrix has been produced, and put into service for 2,200 hours allowing a unique in-situ corrosion test. 10 high Cr alloys havebeen tested this way. The corrosion appearance is found to be a factor of not only the chemical composition but also the production method. HIPd material with high Cr content and low content of Fe and Mo is found to be the best choice for hot corrosion resistance.

AB - The two stroke diesel engine has been continually optimized since its invention more than a century ago. One of the ways to increase fuel efficiency further is to increase the compression ratio, and thereby the temperature in the combustion chamber. Because of this, and the composition of the fuel used, exhaust valve spindles in marine diesel engines are subjected tohigh temperatures and stresses as well as molten salt induced corrosion. To investigate candidate materials for future designs which will involve the HIP process, a spindle with Ni superalloy material samples inserted in a HIPd Ni49Cr1Nb matrix has been produced, and put into service for 2,200 hours allowing a unique in-situ corrosion test. 10 high Cr alloys havebeen tested this way. The corrosion appearance is found to be a factor of not only the chemical composition but also the production method. HIPd material with high Cr content and low content of Fe and Mo is found to be the best choice for hot corrosion resistance.

KW - Corrosion test

KW - HIP

KW - Exhaust valve spindle

KW - Hot corrosion

M3 - Article in proceedings

BT - Proceedings of the 2011 International Conference on Hot Isostatic Pressing

T2 - HIP'11 - International Conference on Hot Isostatic Pressing 2011

Y2 - 12 April 2011 through 14 April 2011

ER -

In-situ hot corrosion testing of candidate materials for exhaust valve spindles

Abstract

Conference

Keywords

UN SDGs

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