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Development of Surface Treatment Techniques to Improve Oxidation Resistance of Titanium Aluminide

MRS Online Proceedings Library 1990年第1期213卷 975-980页

作者： Michiko Yoshihara Ryohei Tanaka Tetuya Suzuki Masayuki Shimizu Dept. of Mechanical Engineering and Materials Science Yokohama National University Yokohama 240 Japan

The oxidation resistance of intermetallic compound TiAl was greatly improved in cyclic heating at 900°C by means of a new type of surface treatment, which is the heat treatment under a low partial pressure oxygen atmosphere. The treatment becomes more effective with increasing aluminum content in the specimen. It was presumed that the excellent oxidation resistance resulting from this method is due to preferential formation of a thin and tighit Al2 O3 surface layer, which is formed during the surface treatment at a temperature vicinity of 1000°C and air pressure of about 10-3 Pa. The oxidation resistance of Al2O3 film formed, however, was found to be insufficient at 950°C. A combined treatment consisting of the heat treatment under a low partial pressure oxygen atmosphere followed by a diffusion coating with aluminum showed an excellent resistance to cyclic oxidation even at 950°C.

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A prototype thin-film thermocouple for transient heat transfer measurements in ceramic-coated combustion chambers

A prototype thin-film thermocouple for transient heat transf...

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International Congress and Exposition

作者： Assanis, Dennis N. Friedmann, Francis A. Wiese, Kevin L. Zaluzec, Matthew J. Rigsbee, J.M. Automotive Systems Laboratory Dept. of Mechanical and Industrial Engr. University of Illinois at Urbana Champaign Urbana IL United States Dept. of Materials Science and Engineering University of Illinois at Urbana Champaign Urbana IL United States

A prototype chromel-alumel overlapping thin-film thermocouple (TFTC) has been developed for transient heat transfer measurements in ceramic-coated combustion chambers. The TFTC has been evaluated using various metallurgical techniques such as scanning electron microscopy, energy dispersive x-ray detection, and Auger electron spectroscopy. The sensor was calibrated against a standard thermocouple in ice, boiling water, and a furnace at 1000°C. The microstructural and chemical analysis of the thin-films showed the alumel film composition was very similar to the bulk material, while the chromel film varied slightly. An initial set of ceramic plug surface temperatures was taken while motoring and firing the engine at 1900 rpm to verify thermocouple operation. The data shows a 613 K mean temperature and a 55 K swing for the ceramic surface compared with a 493 K mean temperature and a 20 K swing for the metal surface at the same location. Transient heat flux calculations indicate a dramatic reduction in heat flux for the ceramic surface. Copyright © 1990 Society of Automotive Engineers, Inc.

关键词： Thermocouples

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THE INTERACTION OF 2 OPPOSING, ASYMMETRIC CURVED WALL JETS

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EXPERIMENTS IN FLUIDS 1988年第4期6卷 243-252页

作者： REW, HS PARK, SO Dept. of Mechanical Engineering Aerospace Program Korea Advanced Institute of Science and Technology Cheong Ryang Seoul Korea

An experimental investigation was made of a two dimensional flow formed by the interaction of two asymmetric turbulent curved wall jets past a circular cylinder. Measurements were made of velocity and turbulence intensity profiles of the two curved wall jets before the interaction, and those of the merged jet after the interaction. The location of the interaction region of the two opposing curved wall jets and the flow direction of the merged jet were found to depend primarily on the ratio of initial momentum fluxes. The velocity and turbulence intensity profiles of the merged jet were similar to those of the plane turbulent jet. However, the growth rate of the merged jet was approximately 1.5 times larger than that of the plane jet. The influence of the momentum flux ratio on the growth rate appeared to be insignificant.

关键词： FLOW OF FLUIDS

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mechanical design failure analysis

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materials science and engineering 1987年 96卷 334-335页

作者： P.L. Jones Dept. of Mechanical Engineering and Materials Science Duke University Durham NC 27706 U.S.A.

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Letter to the editors

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International Journal of Heat and Fluid Flow 1987年第3期8卷 254-254页

作者： Adrian Bejan Dept. of Mechanical Engineering and Materials Science Duke University Durham NC 27706 USA

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STRUCTURE AND mechanical PROPERTIES OF Fe-Cr-Mo-C ALLOYS WITH AND WITHOUT BORON.

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Metallurgical transactions. A, Physical metallurgy and materials science 1981年第6期12 A卷 933-950页

作者： Thomas, Gareth Chen, Yen Lung Department of Materials Science & Engineering University of California Berkeley Dept. of Mechanical Engineering National Taiwan Institute of Technology Taipei Republic of China

The as-quenched structures consist mainly of dislocated martensite. In the boron-free steel, there are more lath boundary retained austenite films. The boron-treated steel shows higher strengths at all tempering temperatures but with lower Charpy V-notch impact energies. Both steels show tempered martensite embrittlement when tempered at 350 degree C for 1 h. While the boron-free steel shows a continuous increase in toughness when temperature above 500 degree C, the boron-treated steel suffers a second drop in toughness at 600 degree C tempering. Nonconventional heat treatments have been designed to improve the mechanical properties.

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The correlation of microstructure and stress corrosion fracture of HY-130 steel weldments

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Metallurgical Transactions A 1980年第10期11卷 1723-1730页

作者： Chen, C. Thompson, A.W. Bernstein, I.M. Dept. of Mechanical Engineering National Taiwan University Taipei Taiwan Dept. of Metallurgy and Materials Science Carnegie-Mellon University Pittsburgh 15213 PA United States

Microstructure is among the most important factors known to affect the stress corrosion cracking (SCC) susceptibility of medium and high strength steels. Multipass welding can produce various microstructures in the weld and heat affected zone on quite a fine scale, so that intimately mixed fracture modes are observed on SCC specimens of such welds. Performance of these welds mirrors the different SCC susceptibilities of the different microstructures. Detailed metallographic observations have been carried out to demonstrate the correlation between the microstructural features and SCC fracture of HY-130 steel weldments. It is shown that the refined microstructures were most resistant to SCC and the accompanying fracture mode was microvoid coalescence. Those microstructures giving rise to the more brittle fracture modes and thus less resistant to SCC were associated with the columnar/coarse equiaxed grain structures of untempered (or slightly tempered) martensite and/or bainite. These results were used as the basis for suggested welding practice to improve the SCC resistance of HY-130 and other medium strength steel weldments. © 1980 American Society for Metals and volume 11 A, October 1980 The Metallurgical Society of AIME.

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Abstracts

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Environmental Management 1978年第5期2卷 459-472页

作者： Wilson, M. P. Crockett, P. W. Davidson, M. Grether, D. Wilcox, K. Brown, L. R. Botts, R. P. Grooms, D. W. Roesijadi, G. Anderson, J. W. Giam, S. S. Nicol, J. A. C. Donohue, W. H. Wang, R. T. Winters, K. Haliburton, T. A. Durham, G. N. Brown, K. W. Peters, R. E. Delaney, T. B. Griffin, L. F. Calder, J. A. Harrison, E. A. Owens, E. H. Whitmore, F. C. Hundemann, A. S. Lager, J. A. Smith, W. G. Tchobanoglous, G. Cavagnaro, D. M. Brown, R. J. Kugler, B. A. Rentz, P. E. Pope, L. D. Anderson, G. S. Commins, D. E. Frazier, N. A. Maase, D. L. Clark, R. Baker, J. Bowlin, M. Hansberger, C. Hanson, P. Colwell, R. R. Sayler, G. S. Olivieri, V. P. Kruse, C. W. Kawata, K. Biggs, R. B. Carvey, K. Farrar, D. R. Glenn-Lewin, D. C. Sanborn, J. R. Francis, B. Magnus Metcalf, R. L. Vigon, B. W. Armstrong, D. E. Phillips, R. A. Lynch, C. S. Carlile, B. L. Stewart, J. M. Hamdy, M. K. Dept. of Mechanical Engineering and Applied Mechanics Rhode Island Univ. Kingston National Technical Information Service Springfield Lawrence Berkeley Lab. Energy Research and Development Administration California Univ. Berkeley Mississippi State Univ USA Corvallis Environmental Research Lab. Oregon Texas A and M Univ. College Station National Science Foundation Washington D.C. Office for the International Decade of Ocean Exploration USA Marine Science Inst. Texas Univ. at Austin Port Arnasas 0ffice for the International Decade of Ocean Exploration USA Army Engineer Waterways Experiment Station Vicksburg Miss Florida State Univ. Tallahassee Dept. of Oceanography National Science Foundation Washington D.C. Coastal Studies Inst. Louisiana State Univ Baton Rouge USA Versar Inc. Springfield Office of Toxic Substances Environmental Protection Agency Washington D.C. Wetcalf and Eddy Inc. Palo Alto Hydro Research Science Santa Clara Municipal Environmental Research Lab. Cincinnati Bolt Beranek and Newman Inc. Canoga Park American Association of State Highway and Transportation Officials Washington D.C. Transportation Research Board Washington D.C. Battelle Columbus Labs. Industrial Environmental Research Lab. Cincinnati Resource Extraction and Handling Div. USA Boise Ctr. for Urban Research Idaho League of Cities-Conference of Mayors Inc. Washington D.C. Department of Housing & Urban Dev. Asst. Sec. for Policy Dev. & Research Washington D.C. Dept. of Biology Maryland Univ. College Park Environmental Research Lab. Gulf Breeze Johns Hopkins Univ. Baltimore School of Hygiene & Public Health Mun. Env. Res. Lab. Cincinnati Coll. of Marine Studies Delaware Univ. Newark Office of Sea Grant National Oceanic and Atmospheric Administration Rockville Energy and Mineral Resources Research Inst. Iowa State Univ. of Science and Technology Ames Illinois Natural History Survey Urbana Solid and Hazardous Waste Research Div. Municipal Environmental Research Lab. Cincinnati Wiscon

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Comments on “phase diagrams of solid wüstite - Part I”

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materials Research Bulletin 1977年第4期12卷 429-432页

作者： M. Hayakawa J.B. Wagner J.B. Cohen Department of Mechanical Engineering Tottori University 1-1 Koyama-cho Tottori City 680 Japan Dept. of Materials Science and Engineering The Technological Institute Northwestern University Evanston Illinois 60201 USA

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Abstracts

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Environmental Management 1977年第1期1卷 67-96页

作者： Frankenfeld, John W. Schulz, Wolfgang McMurty, George J. Petersen, Gary W. May, G. A. Hering, F. S. Schwartz, J. I. Heywood, J. B. Chigier, N. A. Grohse, E. W. Walker, J. D. Colwell, R. R. Petrakis, L. Pergament, H. S. Thorpe, R. D. Schoepf, Richard W. Krzyczkowski, Roman Henneman, Suzanne S. Hudson, Charles L. Putnam, Evelyn S. Thiesen, Donna J. Parks, G. A. McCarty, Perry L. Leckie, J. O. Schrumpf, Barry J. Simonson, G. H. Paine, D. P. Lawrence, R. D. Pyott, W. T. Leh, M. Elders, W. Combs, J. Caplen, T. Harrison, F. L. Wong, K. M. Heft., R. E. Charnell, Robert L. Lehmann, Edward J. Mallon, Lawrence G. Hatfield, Cecile Adams, Gerald H. Johanning, James Talvitie, Antti Noll, Kenneth E. Miller, Terry Smiarowski, Joseph F. Willis, Cleve E. Foster, John H. Schlesinger, Benjamin Daetz, Douglas Lear, Donald U. Smith, Mona F. Hundemann, Audrey S. Crockett, Pernell W. Werner, Kirk G. Carroll, Thomas E. Maase, David L. Genco, Joseph E. Ifeadi, Christopher N. Lowman, F. G. Christensen, S. W. Van Winkle, W. Mattice, J. S. Harrison, Elizabeth A. Barker, James C. Chesness, Jerry L. Smith, Ralph E. Shaheeen, Donald G. Raney, R. Keith Borton, T. Wezernak, C. T. Raney, R. K. Sherwani, Jabbor K. Moreau, David H. Eisenberg, Norman A. Lynch, Cornelius J. Breeding, Roger J. Johnson, J. D. Foster, K. E. Mouat, D. A. Clark, R. Hyden, John William Owen, Wilfred Bayfield, Neil G. Barrow, Graham C. Stolz, Stephanie B. Wienckowski, Louis A. Brown, Betram S. Keyfitz, Nathan Wilson, W. L. Newman, Peter W. G. Bammi, Deepak Bammi, Dalip Goddard, James E. Chisholm, Tony Walsh, Cliff Brennan, Geoffrey Thompson, K. S. Richardson, R. Jensen, Clayton E. Brown, Dail W. Mirabito, John A. Cowing, Thomas G. Binghamton, Suny Siehl, George H. Albrecht, O. W. Alexander, Ariel Barde, Jean -Philippe Darby, William P. McMichael, Francis Clay Dunlap, Robert W. Muckleston, Keith W. Frankenhoff, Charles A. Giulini, Lorenzo T. Wyatt, T. Black, Peter E. Keating, William Thomas Leonard, M. E. Fisher, E. L. Brunelle, M. F. Dickinson, J. E. Pethig, Rudiger Clapham Exxon Research & Engineering Co. Linden Government Research Lab Coast Guard Washington D.C. Department of Transportation Washington D.C. Office For Remote Sensing of Earth Resources. NASA Earth Resources Survey Program Pennsylvania State University Washington D.C. Department of the Navy Washington D.C. Cambridge. Dept. of Mechanical Engineering Massachusetts Inst. of Technology USA Huntsville. School of Graduate Studies and Research Alabama Univ. USA Dept. of Microbiology. Office of Naval Research Maryland Univ. Arlington Research and Development Co. Pittsburgh AeroChem Research Labs. Inc. Princeton Dept. of the Interior Office of Library Services. Bibliographic Series (Final) Washington D.C. Interplan Corp. Santa Barbara Urban Mass Transportation Adm. Washington D.C. Naval Underwater Systems Center Newport Calif. Mercury Project. National Science Found Stanford Univ Washington D.C. Div. of Advanced Environmental Research & Tech. USA Corvallis. NASA Earth Resources Survey Program Oregon State Univ. Washington D.C. Riverside. Inst. of Geophysics and Planetary Physics National Science Foundation California Univ. Washington D.C. Livermore Lawrence Livermore Lab. California Univ. USA Atlantic Oceanographic and Meteorological Labs. National Oceanic and Atmospheric Administration Miami National Technical Information Service Springfield Miami Univ. Coral Gables School of Law National Oceanic and Atmospheric Administration Rockville National Academy of Sciences Office of Sea Grant Washington D. C. School of Law National Oceanic and Atmospheric Administration Office of Sea Grant. Rockville Norman. Dept. of Civil Engineering and Environmental Science. Urban Mass Transportation Administration Oklahoma Univ. Washington D. C. Knoxville.Dept. of Civil Engineering. Federal Highway Administration Tennessee Univ. Washington D. C. Amherst.Water Resources Research Center. Office of Water Research and Technology Massachusetts Univ. Washington D. C. Calif. Dept. of Industria

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