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Metallographic study of metallic fragment of lunar surface materialA high precision investigation of a metallic fragment from the lunar material returned by the Soviet Luna 16 automatic station revealed three characteristic temperature intervals with different kinetics of solid solution decomposition. The following were found in the structure of the iron-nickel-cobalt alloy: (1) delta-phase and alpha-ferrite of diffusional, displacement origin in the grain boundary and acicular forms; and (2) martensite of isothermal and athermal nature, acicular, lamellar, massive, and dendritic. The diversity of the shapes of structural constituents is associated with the effect on their formation of elastic distortions and various mechanisms of deformation relaxation processes.
Document ID
19750003795
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Mints, R. I.
(Kanner (Leo) Associates Redwood City, CA, United States)
Petukhova, T. M.
(Kanner (Leo) Associates Redwood City, CA, United States)
Ivanov, A. V.
(Kanner (Leo) Associates Redwood City, CA, United States)
Date Acquired
August 8, 2013
Publication Date
October 1, 1974
Publication Information
Publication: Lunar Soil from the Sea of Fertility (NASA-TT-F-15881)
Subject Category
Lunar And Planetary Exploration
Accession Number
75N11867
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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