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Thursday, May 7, 2020 | History

2 edition of Chemical mechanisms and reaction rates for the initiation of hot corrosion of IN-738 found in the catalog.

Chemical mechanisms and reaction rates for the initiation of hot corrosion of IN-738

George C. Fryburg

Chemical mechanisms and reaction rates for the initiation of hot corrosion of IN-738

by George C. Fryburg

  • 350 Want to read
  • 37 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English

    Subjects:
  • Metals.,
  • Corrosion and anti-corrosives.

  • Edition Notes

    StatementGeorge C. Fryburg, Fred J. Kohl and Carl A. Stearns.
    SeriesNASA technical paper -- 2319.
    ContributionsKohl, Fred J., Stearns, Carl A., United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.
    The Physical Object
    Pagination31 p. :
    Number of Pages31
    ID Numbers
    Open LibraryOL17831130M

    The use of steam cooling to further increase combined-cycle efficiencies in combustors was introduced in the mid to late s. Steam cooling in blades and nozzles will be introduced in commercial operation in the year In the s, IN blades were widely used. IN, was the acknow- ledged corrosion standard for the industry. To mark this anniversary, this symposium uncovers the history of the development of alloys over the last years: Evolution of Wrought Age Hardenable Superalloys Evolution of Solid Solution Nickel-Base Alloys for Corrosion Applications A Century of Discoveries, Inventors and New Nickel Alloys Evolution of Cast Nickel-Base Superalloys A.

    Free essays, homework help, flashcards, research papers, book reports, term papers, history, science, politics. Studylib. Documents Flashcards Chrome extension Login Upload document CACC`11 Abstracts - The American Ceramic Society. Atlas of Fatigue Curves Edited by Howard E. Boyer Senior Technical Editor American Society for Metals The Materials Information Society ASM lnternatlonal" Materials Park, Ohio Preface This Atlas was developed to serve engineers who are looking for fatigue data on a particular metal or alloy.

    Technical Communication. No cost, no codes. More help 24/7. , Tenth Edition, and its companion Web site, TechComm W. Failure Analysis and Life Assessment of Structural Components and


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Chemical mechanisms and reaction rates for the initiation of hot corrosion of IN-738 by George C. Fryburg Download PDF EPUB FB2

Chemical mechanisms and reaction rates for the initiation of hot corrosion of IN Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.

The fundamentals of corrosion / J.C. Scully; Corrosion and the maintenance engineer, by C. Wilson and J. Oates; Corrosion for marine and offshore engineers / by J. Rowlands and B. Angell; Chemical mechanisms and reaction rates for the initiation of hot corrosion of IN [microform] / Geor.

Chemical mechanisms and reaction rates for the initiation of hot corrosion of IN / (Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.

Corrosion for marine and offshore engineers / by J. Rowlands and B. Angell Marine Media Management Ltd. for the Institute of Marine Engineers London Wikipedia Citation Please see Wikipedia's template documentation for further citation fields that may be required.

This method involves measurement of corrosion current as a result of oxidation-reduction reaction continuously and provides instantaneous corrosion rates.

The net reaction is the oxidation of metal to form oxide scales and the reduction of SO 4 2-to a lower oxidation state. Generally, corrosion is accelerated only when the salt film is molten Cited by: 8. well as insights on corrosion mechanisms for guiding materials development.

General mechanisms for the different types of hot corrosion caused by Na 2 SO 4 deposits were inferred; although, in some cases, specifics were unclear. Tests were also conducted on MCrAlY alloys and Ni-based disk alloys under simulated hot corrosion conditions at oC.

Corrosion of metals is a vital concern for the materials scientist. This natural phenomenon causes substantial financial losses in various sectors and requires extensive efforts to limit its impact.

Mechanism of hot corrosion. Several mechanisms have been proposed for hot corrosion. All the mechanisms involve deterioration of the reaction product barrier that forms on the alloys when the deposits are not present.

Basically, the hot Cited by: 3. CMSX-4 and INLC, industrial gas turbine (IGT) aerofoil alloys with low ( wt%) and high (16 wt%) chromium contents respectively, were exposed to type II. The present investigation was undertaken to examine the effect of pre hot corrosion at °C for h in the salt mixture of 75Na 2 SO 4 + 15NaCl + 10V 2 O 5 (wt.%) to simulate the atmosphere of combustion chamber of a gas turbine engine in the marine environment, on high cycle fatigue behavior of the superalloy IN at °C.

by: 4. hot oxide metal metals boundary metallurgy welding diffusion rates rupture cooling editors deformation Post a Review You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved.

Full text of "DTIC ADA Dispersion Strengthening of Metals" See other formats. growth rates mpa ksi load tests crack materials crack growth rate behavior carbon factor selection iron handbook cycle cyclic corrosion hsla tested intensity stresses campbell notch bending Post a Review You can write a book.

@article{osti_, title = {Corrosion behavior of iron and nickel base alloys under solid oxide fuel cell exposure conditions}, author = {Ziomek-Moroz, M and Holcomb, G R and Covino, Jr, B S and Bullard, S J}, abstractNote = {Topography and phase composition of the scales formed on commercial ferritic stainless steels and experimental low CTE nickel-based alloys were studied.

Once a hot corrosion reaction starts, it will quickly consume the component as shown in Fig. 5 [8], Substituting a protective coating for another that has more resistance to hot corrosion may be a cost-effective option.

38 Fig. 15 Reaction mechanisms of hot corrosion of Ni at °C (a) and °C (b) in gases containing O2, SO2 and SO3 [53]. The susceptibility of nickel-base superalloys to sulphur-induced corrosion is generally.

Mechanisms of oxidation From consideration of the reaction 1 M(s) + O2 (g) = MO(s) 2 it is obvious that the solid reaction product MO will separate the two reactants as shown below in Scheme 1.

M MO O2 Metal Oxide Gas Scheme 1 In order for the reaction to proceed further, one or both reactants must penetrate the scale, i.e., either metal must.

SEM evaluation of the fracture surfaces showed fatigue crack initiation related to microporosity below 0 c and corrosion cracks at greater temperatures. No significant effect of the y' rafting on LCF life was observed; however temperature and stress concentration sites were found to influence failure mechanisms.

Optimisation of selective laser melting parameters for the Ni-based superalloy IN LC using Doehlert’s design. Rapid prototyping journal, 23 (5), – Rapid prototyping journal, 23. Acknowledgements page viii Preface ix Introduction xi Methods of investigation 1 Thermodynamic fundamentals 16 Mechanisms of oxidation 39 Oxidation of pure metals 75 Oxidation of alloys Oxidation in oxidants other than oxygen Reactions of metals in mixed environments Hot corrosion Erosion–corrosion of metals in oxidizing.

Chemical mechanisms and reaction rates for the initiation of hot corrosion of IN NASA Technical Reports Server (NTRS) Fryburg, G. C.; Kohl, F. J.; Stearns, C. A. Sodium-sulfate-induced hot corrosion of preoxidized IN was studied at C with special emphasis placed on the processes occurring during the long induction.HOT CORROSION PROCESSES Corrosion of materials including Ni and Co base superalloys induced by molten salts in an oxidizing gas at elevated temperatures is termed ‘‘hot corrosion’’ (Pettit and Giggins, ; Goward, ; Rapp and Zhang, ; Sidhu et al., ) to distinguish it from the traditional low-temperature corrosion.

Lower corrosion rates of mpy and × mpy were obtained for the laser-treated samples in neutral and acidic electrolytes, respectively, than the corrosion rates obtained for the as-received samples ( mpy and × mpy). Morphological analysis indicated a passive film built by spherical grains of regular size on the metal.