Intermediate Temperature Inert Strength and Dynamic Fatigue of Candidate Silicon Nitrides for Diesel Exhaust Valves

2008 ◽  
pp. 497-508 ◽  
Author(s):  
A. A. Wereszczak ◽  
T. P. Kirkland ◽  
H.-T. Lin ◽  
S. K. Lee
Keyword(s):  
Diesel Exhaust ◽  
Intermediate Temperature ◽  
Silicon Nitrides ◽  
Exhaust Valves ◽  
Dynamic Fatigue

scholarly journals Strength and Fatigue of NT551 Silicon Nitride and NT551 Diesel Exhaust Valves

2000 ◽  
Author(s):  
M.J. Andrews ◽  
A.A. Wereszczak ◽  
T.P. Kirkland ◽  
K. Breder
Keyword(s):  
Silicon Nitride ◽  
Diesel Exhaust ◽  
Exhaust Valves

scholarly journals Strength and fatigue of NT551 silicon nitride and NT551 diesel exhaust valves

2000 ◽  
Author(s):  
M.J. Andrews ◽  
A.A. Werezczak ◽  
T.P. Kirkland ◽  
K. Breder
Keyword(s):  
Silicon Nitride ◽  
Diesel Exhaust ◽  
Exhaust Valves

NICROFER 7016TiAl

Alloy Digest ◽  
2006 ◽  
Vol 55 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Diesel Exhaust ◽  
Rupture Strength ◽  
Slight Modification ◽  
Heat Treating ◽  
Age Hardening ◽  
Good Corrosion Resistance ◽  
Temperature Performance ◽  
Exhaust Valves

Abstract Nicrofer 7016TiAl (also known as alloy 751) is an age-hardening Ni-Cr-Fe alloy with both good corrosion resistance and high rupture strength. It is a slight modification of alloy Nicrofer 7016TiNb (alloy X-750) and is used in diesel exhaust valves. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-630. Producer or source: VDM Technologies Corporation.

Diesel Exhaust Valves

1966 ◽  
Author(s):  
Vernon A. Johnson ◽  
Clifford W. Galen
Keyword(s):  
Diesel Exhaust ◽  
Exhaust Valves

scholarly journals Corrosion resistance of valve steel in diesel exhaust gas containing 5, 10 and 20 % of FAME

2013 ◽  
Vol 152 (1) ◽  
pp. 51-55
Author(s):  
Andrzej SUCHECKI ◽  
Krzysztof ADAMASZEK ◽  
Mariusz WISŁA
Keyword(s):  
Corrosion Resistance ◽  
Diesel Exhaust ◽  
Diffusion Processes ◽  
Oxidation Catalyst ◽  
Exhaust Gas ◽  
Durability Test ◽  
Term Operation ◽  
Mechanical Tensions ◽  
Valve Steel ◽  
Exhaust Valves

The operating properties of exhaust valves under heavy thermal and mechanical loads are dependent on the strength of steel i.e. resistance to mechanical deformations under increased and high temperatures and high temperature corrosive action of hot exhaust gas. Long term operation of exhaust valves under the conditions of cyclic thermal and mechanical tensions in the environment of diesel exhaust gas where the main oxidizing components are oxygen, carbon dioxide and overheated steam leads to a corrosion of the steel surface and diffusion processes on the thin surface layer of steel, which, under extreme conditions, may lead to a deformation of the valve, an increased leakage of the combustion chamber and a damage or destruction of the engine. The investigations of the corrosion resistance of valve steel in diesel exhaust gas containing 5, 10 and 20 % of FAME were conducted on the durability test stand of BOSMAL Automotive Research and Development Institute in Bielsko-Biała in the oxidation catalyst chamber under the conditions simulating the operation of exhaust valves in diesel engines. The tests have confirmed that the corrosion resistance of valve steel in diesel exhaust gas decreases with an increased content of FAME in the fuel and as the content of Cr, Si, Ni is reduced in the tested valve steel and the content of Mn is increased in the tested valve steel.

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