METALLOGRAPHIC STUDIES OF SPUTNIK 4 FRAGMENT
Metallographic analyses were performed on a fragment of steel recovered after the disintegration of Sputnik 4 and on a melted agglomerate found on the fragment. The examination indicated that the material was a hot-rolled carbon steel similar in hardness to a structural steel with a tensile strength of 3.8 to 4.1 x 10/sup 10/ dynes/cm/sup 2/. The major portion of the fragment exhibited a banded structure characteristic of hot-rolled material. The upper surface was probably heated to the melting point which resulted in the formation of a narrow band similar to an as-cast Widmannstaettn microstructure. The melted material at the bottom of the specimen was a porous mass containing several different varieties of inclusions and compounds. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, N.Y.
- NSA Number:
- NSA-17-037470
- OSTI ID:
- 4647136
- Report Number(s):
- BNL-6596; 0022-1406
- Journal Information:
- Journal of Geophysical Research (U.S.), Vol. Vol: 68; Other Information: BNL-6596. Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United States
- Language:
- English
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