Behaviour of high temperature alloys in aggressive environments

proceedings of the Petten International Conference held at the JRC Petten Establishment, The Netherlands, on 15-18 Oct. 1979 by International Conference on the Behaviour of High Temperature Alloys in Aggressive Environments$ (1979 JRC Petten Establishment)

Publisher: Metals Society in London

Written in English
Cover of: Behaviour of high temperature alloys in aggressive environments | International Conference on the Behaviour of High Temperature Alloys in Aggressive Environments$ (1979 JRC Petten Establishment)
Published: Pages: 1068 Downloads: 215
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Subjects:

  • Heat resistant alloys -- Congresses,
  • Materials at high temperatures -- Congresses

Edition Notes

Statementedited by I. Kirman ... [et al.].
ContributionsKirman, I, Commission of the European Communities. Joint Research Centre. Petten Establishment, Metals Society, Bond voor Materialenkennis, International Conference on the Behaviour of High Temperature Alloys in Aggressive Environments.
Classifications
LC ClassificationsTA"485"I62"1979
The Physical Object
Pagination1068 p :
Number of Pages1068
ID Numbers
Open LibraryOL21661948M
ISBN 100904357309

stainless steel alloys are needed to increase the operating temperature limits of the currently used alloy families in AUSC boilers and steam turbines. New, improved methods are also necessary to design and predict the mechanical, oxidation, and corrosion behavior of structural materials in high-temperature, high-pressure fossil energy. High temperature corrosion is a very complex science dealing with gas, solids and sometimes liquids. All aspects of the phenomena need to be taken into account, including thermodynamics, transport phenomena, reaction kinetics, mechanical behavior and multiphysical couplings. During their service life, it is essential that high-temperature alloys resist aggressive environments without deterioration of mechanical properties. Abrasive wear is a major concern here because it is closely related to the surface hardness of a material. Alloy MA is an oxide dispersion strengthened iron-base alloy that combines strength and corrosion resistance at high temperatures. This behavior makes it an attractive material for aggressive environments like that prevalent in residual oil-fired boilers. This paper presents an analysis of oil ash corrosion behavior of alloy MA

The effect of alloy composition on cold cracking susceptibility was assessed using a dye penetrant technique. The high-temperature ( C) sulfidation behavior of low-Al alloys ( wt.% Al), which exhibited good weldability, was examined using a thermogravimetric balance in a moderately reducing % H{sub 2}S% H{sub 2}-bal. Ar gas. Titanium alloys are well recognized as appropriate materials for biomedical implants. These devices are designed to operate in quite aggressive human body media, so it is important to study the corrosion and electrochemical behavior of the novel materials alongside the underlying chemical and structural features. In the present study, the prospective Ti‒Zr-based superelastic alloys (TiZr. The combination of an aerated moist environment with the presence of hydrogen sulfide gas (H 2 S) dissolved in water provides a very aggressive medium (Figure 16), which promotes the corrosion of metals and alloys, such as CS and SS. The presence of dust, from the geothermal field and condensation cycles favor the failure of protective coatings. As a result, corrosion scales can form on the surface of stainless steel after extended exposure to aggressive aqueous environments. Corrosion scales play an important role in affecting water quality.

Kumar et al. [11] studied the oxidation behavior of IN polished up to mirror finishing at temperature range – °C. Vesel et al. [12] studied oxidation behavior of IN upon treatment with oxygen and hydrogen plasma at temperatures up to °C. The surface of the alloy was prepared by grinding using fine-sandpaper grade. However. An experimental technique for low cycle fatigue experiments in high pressure, high temperature supercritical CO 2 environment is developed. The test setup allows for pressurized LCF testing of alloys being considered for MW scale sCO 2 turbine development.   Ogawa, T, Hasunuma, S, Sogawa, N, Yoshida, T, Kanezaki, T, & Mano, S. "Characteristics of Fatigue Crack Growth and Stress Corrosion Cracking in Aggressive Environments of Aluminum Alloys for Hydrogen Gas Containers." Proceedings of the ASME Pressure Vessels and Piping Conference. Volume 6B: Materials and Fabrication. Anaheim, California, USA. Lai, G. Y "Materials Behavior in High Temperature, Sulfidizing Environments", CORROSION/84, Pa National Association of Corrosion Engineers, Houston, Texas, (). plus data from brochures Haynes and Pocket Guide to Haynes Alloys from Cabot Corp [ Links ]

Behaviour of high temperature alloys in aggressive environments by International Conference on the Behaviour of High Temperature Alloys in Aggressive Environments$ (1979 JRC Petten Establishment) Download PDF EPUB FB2

International Conference on the Behaviour of High Temperature Alloys in Aggressive Environments ( Petten Establishment). Behaviour of high temperature alloys in aggressive environments. London: Metals Society, (OCoLC) Material Type: Conference publication: Document Type: Book: All Authors / Contributors.

This chapter addresses the different aspects of high temperature coatings. A large number of industrial processes operate in very aggressive environments characterized by high temperature, increased temperature gradients, high pressure, large stresses on individual components, and the presence of oxidizing and corroding atmosphere.

High Temperature Corrosion of Engineering Alloys. Oxidation behaviour of Fe-Al-Si alloys at and K (S. Guan et al.). High temperature oxidation of iron-aluminum alloys (R. Prescott et al.). Oxidation of Fe-Cr-Mn-Ai stainless steels (K. Kurokawa et al.).Book Edition: 1. High-Temperature Behaviour of Austenitic Alloys high temperature behaviour of advanced heat resistant materials.

The project started with a thesis work [1] in the summer of and is carried the in uence of long term ageing and tough environments, such as biomass. The erosion/corrosion behavior of five commercial high temperature materials (alloy H, AISIalloy AC66, alloy TM, alloy ) was investigated in synthetic waste incineration atmosphere using silica sand as erosive particles.

It was found that the erosion/corrosion behavior depended sensitively on the particle velocity. The high temperature scaling of alloys in gaseous environments constitutes a limitation to the development of more efficient energy conversion devices.

Five principal corrosion problems — oxidation, sulphidation, hot corrosion, carburisation or metal dusting, and reaction with chlorine or chlorine-bearing gases — may be identified. High Temperature Alloys for Gas Turbines and Other Applications, Proceedings of a Conference Held in Liège, Belgium, OctoberW.

Betz, ISBNEditor W. Betz4/5(1). for high-temperature applications. The stain-less steels, developed and applied in the sec-ond and third decades of the 20th century, served as a starting point for the satisfaction of high-temperature engineering require-ments.

They soon were found to be limited in their strength capabilities. The metallurgi-cal community responded to. The compositions of the Behaviour of high temperature alloys in aggressive environments book exposed to the dusting environment are given in Table Specimens were cut from the initial plates provided by the manufacturers; dimensions of the specimens were approximately 10 × 8 mm 2 and their thicknesses varied, as a function of the thicknesses of the plates, from 3 to 8 mm.

A preliminary metallographic study of the alloys was. Metal dusting is a form of aggressive high temperature corrosion that many metals and alloys undergo in carbon-supersaturated environments.1−9 Such environments are characteristic of many processes in the petrochemical industry, involving, for example, the conversion of hydrocarbons to high value chemicals and the production of syngas (CO + H 2).

tive behavior, and teacher observations, teachers can identify which physical aspects of their classroom need to be improved.

Changing the classroom environment can increase academic engagement and decrease disruptive behavior. One challenge teachers face is disrup - tive behavior in their classrooms. In a survey, 75% of teachers noted.

Platinum has similar chemistry to nickel and so reacts similarly with the alloying elements and has been investigated as a potential substitute in higher temperature alloys in even more aggressive.

Dear Colleagues, Alloys of various kinds are widely used in applications where high-temperature and aggressive environments are both present. Regardless of. Corrosion Behavior Stainless Steel High-Alloy Steels Ni-Alloy Filler Metal Aggressive Environment Bleach Plant Environment Weld Metal Corrosion Postweld Cleaning Autogenous Welds Corrosion Resistance Introduction In the s, corrosion of welded austenitic, ferritic and duplex stainless steels in aggressive acid chloride envi­.

Nicholls, J.R., Sammel, J., Hurst, R.C., and Hancock, P.: “The Influence of Hot Corrosion and Oxidation on the High temperature Creep Behaviour of Stainless Steel and Nimonic ”, in “Behaviour of High Temperature Alloys in Aggressive Environments” Proc. Internat. This invaluable book reviews the state of the art of high temperature related problems pertaining to their utility, microstructure, mechanical properties, actual behavior in different environments, their protection by various kinds of coatings at high temperatures and a new concept of nanomaterials at high.

Potentiodynamic Polarization Measurements. Figure 2 represents electrochemical curves for the WC-Co-Ru alloys in a neutral environment of 1 M sodium chloride, while Table 3 gives a summary of the electrochemical parameters of the WC-Co-Ru alloys exposed in this medium.

The alloys all displayed active to passive transition behavior, albeit with small passive regions, which is in contrast. In general, pitting on the aluminum alloy surface takes place in the presence of an electrolyte within a – pH range and tends to increase with an increase in temperature, concentration of aggressive ions and stagnation of the electrolyte.

Excessive velocities lead to erosion–corrosion possibilities. Bavarian et al., “High Temperature Corrosion behavior of BetaS Titanium Alloy” (Paper no. presented at the NACE Corrosion’ 93 Annual Conference, Houston, TX, ).

36 P.J. Bania and W.M. Parris, “Beta S: A High Temperature, Metastable Beta Titanium Alloy,” (Presented at the TDA International Conference on Titanium.

G.S. Was, P.L. Andresen, in Structural Alloys for Power Plants, Nickel-base alloys. Nickel-base alloys are widely used as structural materials in high temperature, engineering systems with aggressive are used as turbine blades in aircraft jet engines at very high temperature.

They are also widely used in nuclear reactor systems in ex-core components. • Miscellaneous Nonferrous Alloys: Nickel and its alloy: high corrosion resistant (Example: monel – 65Ni/28Cu/7wt%Fe – pumps valves in aggressive environment) - Lead, tin and their alloys: soft, low recrystallization temperature, corrosion resistant (Applications: solders.

Metal dusting was observed in the inlet tube of a heat exchanger unit, where the high temperature reaction gas is employed for getting high temperature water steam. Alloy was used for inlet. High entropy alloys; Mechanical behaviour in nuclear environment: testing and modelling (e.g.

high temperature, high relative humidity, irradiation, aggressive environments) Environmental effects: Internal swelling reactions (e.g. ASR, DEF) of concrete used in NPPs, corrosion of reinforced structures (e.g. carbonation, chloride attack. One commonly used metallic structural material is the austenitic Fe-Ni-Cr Alloy H and, as it has been established that this alloy’s room temperature ductility is destroyed through carburisation (1–3) while its creep ductility at the very high temperature of °C is, if anything, enhanced (4), it is necessary to account for such.

Aggressive downsizing of the internal combustion engines used as part of electrified powertrains in recent years have resulted in increasing thermal loads on the cylinder heads and consequently, the susceptibility to premature thermo-mechanical fatigue failures.

To enable a reliable computer aided engineering (CAE) prediction of the component lives, we need more reliable material deformation. The high temperature corrosion behavior was observed using measurements of the oxide morphology and thickness, the extent of internal corrosion, and the compositional changes in the scale and in.

Application of Confocal Scanning Laser Microscope in Studying Solidification Behavior of Alloy (Pages: ) Hongwei Song; Zhujun Miao; Oxidation of Superalloys in Extreme Environments (Pages: ) B.

Pint; S. Dryepondt Effect of Microstucture and Environment on the High‐Temperature Oxidation Behavior of Alloy Plus. The Ni-chromium-molybdenum (Ni-Cr-Mo) series contains a balanced selection of beneficial alloying elements so it can handle a variety of aggressive environments.

By design, Alloy 22 or N is one of the most versatile corrosion resistant nickel alloys since it has outstanding corrosion resistance both in reducing and oxidizing conditions. as L, Sani alloy 20Cb-3, alloyAl6-XN etc.

With these alloys, resistance to aggressive (high temperature) caustic solutions increases significantly compared with the series stainless steels.

Nickel Alloys. Commercially pure nickel, alloy (N) and alloy. Effects of Charged Hydrogen on Oxidation Behavior of Alloy in High Temperature Water Environments Hao Peng Chen, J, Ma, J, Xiong, Q, Xiao, Q, & Li, H. "Effects of Charged Hydrogen on Oxidation Behavior of Alloy in High Temperature Water Environments." Proceedings of the 25th Book Proposal Guidelines; Resources.

The high cycle fatigue (HCF) properties of two cast nickel base-superalloys, IN LC and INwere investigated using both fracture mechanics samples and smooth specimens.

The crack propagation behavior was studied in terms of linear fracture mechanics at RT and at °C. In addition to the influence of temperature, the influences of frequency, mean stress, and environment (vacuum, air. Superalloys are operated in industrial environments containing corrosive species such as sulfur, chlorine- or carbon-containing compounds, water vapor, alkali and alkaline-earth metal salts, or ashes such as vanadates [1,2].At elevated temperatures, such compounds cause a wide range of attack types on most metallic alloys such as oxidation, carburization, sulfidation, hot corrosion, or a.H2S On The Behavior Of Engineering Alloys.

More recent research has been directed at identifying materials that can withstand service conditions where pressures and temperatures are in excess of MPa and C, in the presence of significant quantities of corrosive gases such as H 2 S and CO 2 and aggressive species such as chlorides and sulfur compounds.