Long-Term Oxidation of Candidate Cast Iron and Stainless Steel Exhaust System Alloys from 650 to 800 °C in Air with Water Vapor

Brady, Michael P.; Muralidharan, Govindarajan; Leonard, Donovan N.; Haynes, J. Allen; Weldon, R. G.; England, Roger

doi:10.1007/s11085-014-9496-1

Cited by 40 publications

(20 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: 17mentioning

confidence: 99%

“…24 Cast AFA alloys capable of 1100°C operation have also been identified, although they are based on Fe-35Ni-25Cr alloys with Hf and Y additions, which increase alloy costs. 24 Fe-25Ni-18Cr alloys based on wrought AFA compositions have also been reported. 25 In 2015, aluminum-modified CF8C-Plus alloys were pursued and developed at ORNL that have a different chemistry, including lower Ni and higher Cr, W, Cu and C levels than the previous wrought AFA and CAFA alloys and were intended to be more costeffective and have higher creep strength and oxidation resistance at 950-1000°C for automotive exhaust component (manifold and turbocharger) applications (Table II).…”

Section: 17mentioning

confidence: 99%

See 1 more Smart Citation

Development of Creep-Resistant and Oxidation-Resistant Austenitic Stainless Steels for High Temperature Applications

Maziasz

2017

JOM

View full text Add to dashboard Cite

Austenitic stainless steels are cost-effective materials for high-temperature applications if they have the oxidation and creep resistance to withstand prolonged exposure at such conditions. Since 1990, Oak Ridge National Laboratory (ORNL) has developed advanced austenitic stainless steels with creep resistance comparable to Ni-based superalloy 617 at 800-900°C based on specially designed ''engineered microstructures'' utilizing a microstructure/composition database derived from about 20 years of radiation effect data on steels. The wrought high temperature-ultrafine precipitate strengthened (HT-UPS) steels with outstanding creep resistance at 700-800°C were developed for supercritical boiler and superheater tubing for fossil power plants in the early 1990s, the cast CF8C-Plus steels were developed in 1999-2001 for land-based gas turbine casing and diesel engine exhaust manifold and turbocharger applications at 700-900°C, and, in 2015-2017, new Al-modified cast stainless steels with oxidation and creep resistance capabilities up to 950-1000°C were developed for automotive exhaust manifold and turbocharger applications. This article reviews and summarizes their development and their properties and applications.

show abstract

Section: 17mentioning

confidence: 99%

Section: 17mentioning

confidence: 99%

Development of Creep-Resistant and Oxidation-Resistant Austenitic Stainless Steels for High Temperature Applications

Maziasz

2017

JOM

View full text Add to dashboard Cite

show abstract

“…The higher the silicon content in the base material, the faster the oxide layer forms. A number of studies concerning the corrosion resistance of SiMo cast iron focus on a relatively short time of exposure to oxidation (500 h on average) [10]. These studies are conducted mainly in terms of the use of SiMo cast iron in automotive castings, as described by Rouczka [11] and many other authors [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo Addition on the Chemical Corrosion Process of SiMo Cast Iron

Stawarz

Nuckowski

2020

Materials

View full text Add to dashboard Cite

The study was carried out to evaluate five SiMo cast iron grades and their resistance to chemical corrosion at elevated temperature. Corrosion tests were carried out under conditions of an actual cyclic operation of a retort coal-fired boiler. The duration of the study was 3840 h. The range of temperature changes during one cycle was in the range of 300-650 • C. Samples of SiMo cast iron with Si content at the level of 5% and variable Mo content in the range 0%-2.5% were used as the material for the study. The examined material was subjected to preliminary metallographic analysis using scanning microscopy and an Energy dispersive spectroscopy (EDS) system. The chemical composition was determined on the basis of a Leco spectrometer and a Leco carbon and sulfur analyzer. The examination of the oxide layer was carried out with the use of Scanning electron microscope (SEM), EDS, and X-ray diffraction (XRD) methods. It was discovered that, in the analyzed alloys, oxide layers consisting of Fe 2 O 3 , Fe 3 O 4 , SO 2 , and Fe 2 SiO 4 were formed. The analyzed oxide layers were characterized by high adhesion to the substrate material, and their total thickness was about 20 µm.

show abstract

“…Depending on the exhaust gas temperature, different types of iron based alloys are used as manifold materials. Among these alloys, ferritic ductile cast irons, and ferritic stainless steels are used at lower temperatures while austenitic ductile cast irons and austenitic stainless steels are preferred at elevated temperatures [4,5]. As ferritic ductile cast iron, GGG40 and SiMo are preferred as exhaust manifold materials.…”

Section: Introductionmentioning

confidence: 99%

“…Due to its high Si content, Si-rich oxide layer forms and acts as a barrier layer at elevated temperatures. In exhaust gas atmosphere, all these manifold materials are subjected to severe high temperature oxidation [4][5][6]. Ferritic cast stainless steels can be used at respectively higher temperatures than ferritic ductile cast irons and Cr content in their chemical composition provides higher oxidation resistance.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the high temperature oxidation behavior of iron based alloys used as exhaust manifolds

et al. 2018

View full text Add to dashboard Cite

Nowadays engine capacities of vehicles spread in a wide range due to different vehicle power demands. Power density of engines affects exhaust gas and therefore exhaust gas temperature varies from 650 °C to 1000 °C in exhaust manifolds. Depending on the exhaust gas temperature, different types of iron based alloys are used as manifold materials such as ferritic ductile cast irons (GGG40, SiMo), austenitic ductile cast irons (Ni-resist D5S), ferritic cast stainless steels (ACIHK30, AISI 409) and austenitic cast stainless steels (CF8C). In this study high temperature oxidation behavior of different cast alloys used as exhaust manifold materials like, (i) GGG40 ferritic ductile cast iron, (ii) SiMo ferritic ductile cast iron (iii) AISI 409 ferritic cast stainless steel and (iv) CF8C austenitic cast stainless steel, were investigated.

show abstract

Long-Term Oxidation of Candidate Cast Iron and Stainless Steel Exhaust System Alloys from 650 to 800 °C in Air with Water Vapor

Cited by 40 publications

References 29 publications

Development of Creep-Resistant and Oxidation-Resistant Austenitic Stainless Steels for High Temperature Applications

Development of Creep-Resistant and Oxidation-Resistant Austenitic Stainless Steels for High Temperature Applications

Effect of Mo Addition on the Chemical Corrosion Process of SiMo Cast Iron

Characterization of the high temperature oxidation behavior of iron based alloys used as exhaust manifolds

Contact Info

Product

Resources

About