An Integral Engineering Solution for Design of Exhaust Manifolds

Gocmez, Taner; Deuster, Udo

doi:10.4271/2009-01-1229

Cited by 21 publications

(18 citation statements)

References 8 publications

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“…Better material can improve thermal fatigue life and reduce creep effects. The oxidation problem can often be solved by using a material with higher resistance to oxidation but often at a trade-off against high temperature strength (Gocmez and Deuster, 2009). Exhaust manifold material selection and the properties of high temperature oxidation and thermal fatigue were discussed by Park et al (2005).…”

Section: Design Solutions For Exhaust Manifold Durabilitymentioning

confidence: 99%

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Durability and reliability in diesel engine system design

Xin¹

2013

Diesel Engine System Design

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Section: Design Solutions For Exhaust Manifold Durabilitymentioning

confidence: 99%

“…This certainly affects engine performance. Gocmez and Deuster (2009) provided a review of exhaust manifold failure modes, lifetime prediction, and design optimization.…”

Section: Design Solutions For Exhaust Manifold Durabilitymentioning

confidence: 99%

Durability and reliability in diesel engine system design

Xin¹

2013

Diesel Engine System Design

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“…(1,2) In comparison to cast iron, stainless steel fabricated solutions enable both a weight reduction and a higher temperature resistance. (2,3) More and more severe emission standards will lead the car manufacturers to consider higher exhaust gas temperature to improve catalytic conversion efficiency but with equivalent or stronger requirements on the part lifetime.…”

Section: Introductionmentioning

confidence: 99%

Thermal Fatigue Resistance of Welded Joints in Stainless Steel High Temperature Exhaust Applications

Faivre¹,

Santacreu²,

Leseux³

2011

TMM

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Weld seams often constitute critical points in the thermo-mechanical fatigue design of a stainless steel automotive exhaust manifold. Therefore, a thermal fatigue test on V-shaped specimens was developed by ArcelorMittal Isbergues Research Centre to simulate the thermo-mechanical loading of such a part. Two ferritic base metals dedicated to high temperature applications, together with various filler materials (both austenitic and ferritic grades) commonly used in the exhaust market were tested with a 250-950°C thermal cycle. The results were compared in terms of lifetime, cracking mechanisms and micro-structural evolution in order to point out the best base/filler metal combinations. For austenitic weld metals, the higher thermal expansion coefficient than ferritic weld metals (50% higher) led to a more pronounced oxidation and a higher level of stresses generated at the interface between melted zone and base metal. Consequently, the cracks were localized to this interface for austenitic filler material while they appeared in the base metal and out of the heat affected zone for ferritic filler material.

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“…As a consequence of the decrease of the pollutants emissions of vehicles (high reduction of NOx, HC, PM from Euro 3 to Euro 6), the temperature of the exhaust gas tends to increase. Therefore, corrosion and thermomechanical fatigue resistance of exhaust line need to be improved by the use of stainless steel rather than cast iron [1].…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical fatigue behaviour of ferritic stainless steel grades for high temperatures applications

et al. 2018

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Abstract. Nowadays high temperatures resistant materials are needed to resist to high temperature applications (up to 1000°C), such as automotive exhaust gas manifolds. Some developed stainless steel grades, including ferritic grades or austenitic refractory grades, can be used in this temperature range and both in continuous or cyclic thermal conditions. In order to predict the thermomechanical fatigue damage of stainless steel parts submitted to cyclic thermal loading and constrained bonding conditions, the elastoviscoplastic model by Chaboche is determined for a wide range of temperatures, of strain amplitudes and strain rate levels thanks to isothermal traction-compression tests. The validation procedure is performed afterward by comparison with stabilized behavior under non isothermal conditions on a dedicated thermal fatigue test performed on V-shape specimens. Results of simulation show very good fitting with the experimental curves which would lead to a more accurate fatigue life prediction. A damage model was derived from Taira's thermal low-cycle fatigue model to include dwell-time period at high temperature and creep-oxidation effect. In this paper the example of K44X, a dedicated grade for high temperatures applications, is presented.

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An Integral Engineering Solution for Design of Exhaust Manifolds

Cited by 21 publications

References 8 publications

Durability and reliability in diesel engine system design

Durability and reliability in diesel engine system design

Thermal Fatigue Resistance of Welded Joints in Stainless Steel High Temperature Exhaust Applications

Thermomechanical fatigue behaviour of ferritic stainless steel grades for high temperatures applications

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