NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Optical properties and spectral emissivities at 632.8 nm in the titanium-aluminum systemOptical properties (including spectral emissivity, refractive index, and extinction coefficient) of liquid Ti-Al alloys were measured as functions of temperature (including temperatures up to 350 K below the equilibrium liquidus temperatures), using laser ellipsometry at 632.8 nm. The experiments were conducted under containerless conditions, using electromagnetic levitation and heating supplemented by CO2 laser beam heating. It is shown that the emissivities of liquid Ti-Al alloy vary with temperature in a manner that can be understood by the same theories which are applicable to solid metals, for regions near to and above the liquidus temperature. At temperatures below the liquidus temperature, the optical properties of highly undercooled liquid Ti-Al alloys are not dependent on temperature.
Document ID
19930041110
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Krishnan, S.
(NASA Headquarters Washington, DC United States)
Anderson, C. D.
(NASA Headquarters Washington, DC United States)
Weber, J. K. R.
(NASA Headquarters Washington, DC United States)
Nordine, P. C.
(Intersonics, Inc. Northbrook, IL, United States)
Hofmeister, W. H.
(NASA Headquarters Washington, DC United States)
Bayuzick, R. J.
(Vanderbilt Univ. Nashville, TN, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 24A
Issue: 1
ISSN: 0360-2133
Subject Category
Metallic Materials
Accession Number
93A25107
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available