Metals & Alloys

Inconel, Inconel-X and Type 347 SS

September 12, 2007

Effects of Preoxidation Treatments on Spectral Normal and Total Normal Emittance of Inconel, Inconel-X and Type 347 Stainless Steel Authors: Wayne S. Slemp; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER Abstract: The spectral/normal-emittance values of several oxidized surfaces prepared by varying the preoxidation treatments or oxidation time for inconel, Inconel-X, and type [...]

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New System for Spectral Emissivity Measurements & Spectral Emissivity of Metals at the University of Duisburg

September 2, 2007

On the 13-15 June, 2001, in Budapest, Hungary, the 12th International Conference on Thermal Measurements and Thermogrammery (THERMO) was held. Among the papers were two by Prof. Dr.-Ing. W. Bauer, Dipl.-Phys., A. Moldenhauer, Dipl.-Phys. & M. Rink of the Gerhard Mercator Universität Duisburg, Germany The first presentation was entitled: “New System for Spectral Emissivity Measurements [...]

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Normal Spectral Emittance of Some Metals, Carbon and SiN

August 21, 2007

The “Emissivity” page on the FAR Associates website includes a discussion of their unique instrument along with graphs and some tables of spectral emissivity values are evidently all reproduced from the Thermophysical Properties of Matter, Vol. 7: Thermal Radiative Properties, Y.S. Touloukian and D.P. DeWitt, IFI/Plenum, New York, 1970. These include curves for: Carbon (Graphite), [...]

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Raytek’s Emissivity Table for Metals

August 20, 2007

The Raytek North America website contains a table of spectral emissivity for metals with values at 1.0 micrometers (micron). 1.6 microns and the 8-14 micron waveband. Many values are blank or labelled “nr” for “Not Recommended”. Many others cover relatively wide spans of values, varying as much as a factor of 4. The metals covered [...]

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A Basic Guide to (Infrared) Thermography

August 20, 2007

A Basic Guide to Thermography A PDF Download from the Land Instruments website – (Last modified 15/11/04 -433kb – 14 pages). It contains a table of effective spectral emissivities over the 8 to 14 micrometer waveband for several common industrial and building materials as part of its introduction to Infrared Thermography.

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Thermal Radiative Properties Metallic Solids and Alloys (PDF, 9.5 MB)

August 19, 2007

This link enables one to download the 54 page introductory section of the CINDAS book (9.5 MB pdf), Thermophysical Properties of Matter, Vol. 7 Edited by Y.S. Touloukian and D.P. DeWitt IFC/Plenum -1970. It contains some excellent details on the meaning of emissivity, its terminology, the measurement techniques of 1970 and an introduction to the [...]

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Change of infrared emissivity of metal surfaces during oxidation

August 19, 2007

High Temperatures – High Pressures, volume 30 (1998), issue number 3, pages 333-341.by Harald Mehling, Joachim Kuhn, Marco Valentin, Jochen Fricke Received 22-Jan-1997; Published in print 01-Jun-1998 Abstract

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Spectral Emissivity of Tungsten & Molybdenum

August 19, 2007

The “Metals” page at the Far Associates website states : “The emissivity of metals often changes with wavelength. This means it is very difficult to determine what emissivity should be entered in passive, traditional pyrometers (all those that do not determine the emissivity during measurement). An example or two will show the difficulty.” The graphs [...]

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