POWER REACTOR PROGRAM. Progress Report to Savannah River Operations Office, United States Atomic Energy Commission for the Period July 1, 1962 through July 31, 1962

Technical Report · Fri Aug 31 00:00:00 EDT 1962

OSTI ID:4747497

Isserow, S; Anderson, R W; Larson, W L

U-350 ppm Fe-900 ppm Al alloys containing additions of silicon to 1100 ppm are evaluated. Metallographic examinations of the as-cast alloys show that the grain size is decreased with increasing silicon content, and a different type of second-phase structure is formed within the grains. Extrusion of the U-0.3 Al- -0.18 Si alloy has shown that alpha working before coextrusion is not necessary for smooth core-cladding interfaces. Unsuccessful attempts to heat treat billet- size sections of this alloy -ndicate that a iower alloy content may be advantageous. ln an effort to define the factors responsible for hardness transition temperatures in the 500 deg C range, uranium alloys containing 500 and 1000 ppm molybdenum were hot hardness tested. The hardness data suggest that the high hardness transition temperature is related to some critical distribution of a second phase. This behavior is more stable in alloys containing 1.0 and 1.5 wt% molybdenum than in lower alloys. A series of experiments improving the understanding of the brazing operation is expected to help obtain brazed end closures of better quality. The experiments show that the braze alloy will flow completely around the end plug if the components are properly heated, adsorbed gases do not affect the quality of the brazed closure, and voids are caused by shrinkage. (auth)

• Research Organization: Nuclear Metals, Inc., Concord, Mass.
• DOE Contract Number: AT(30-1)-1565
• NSA Number: NSA-16-033477
• OSTI ID: 4747497
• Report Number(s): NMI-7253
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-62
• Country of Publication: United States
• Language: English

Related Subjects

METALS, CERAMICS, AND OTHER MATERIALS
ADDITIVES
ADSORPTION
ALUMINUM
BRAZING
CASTING
CLOSURES
DEFORMATION
DISTRIBUTION
EFFICIENCY
EXTRUSION
FUEL CANS
GASES
GRAIN SIZE
HARDNESS
HEAT TREATMENTS
HOT WORKING
IRON
MATERIALS TESTING
METALLOGRAPHY
MOLYBDENUM
MOLYBDENUM ALLOYS
PHASE DIAGRAMS
POROSITY
POWER PLANTS
SHRINKAGE
SILICON
STABILITY
SURFACES
TEMPERATURE
URANIUM ALLOYS
VOLUME