FABRICATION OF IRON-ALUMINUM CHROMIUM ALLOY FUEL PLATES

Journal Article · Wed Jan 01 00:00:00 EST 1958 · Am. Inst. Mining Met. Petrol. Engrs., Inst. Metals Div., Spec. Rept. Ser.

OSTI ID:4251596

King, B; Neri, J; Tate, F G

ABS>Briefly discussed are the characteristics (oxidation resistance, moderate cross section, and adaptability to reprocessing) that recommend Fe-Al alloys for use as cladding materials for gas-cooled core components, and the metallurgical peculiarities (brittleness, joining difficulties, and marginal hot strength) that have limited their use in the past. The properties of a newlydeveloped Fe-Al base alloy (71/2 wt.% Al, 5 wt.% Cr, 1 wt. % Cb, 1/2 wt.% Ti, remainder Fe) in which the deficiencies of older materials have been largely eliminated are summarized. Exploratory studies involving the fabrication by hot- roll bonding of dummy fuel elements are described; this work consisted of bonding the alloy described above to itself, to a 302B stainless steel-UO/sub 2/ cermet, and to a 0.20 wt,% C steel-Al/sub 2/O/sub 3/ cermet. Steps in assembling the elements, using a modified picture frame technique, are covered briefly. Methods for removing surfuce oxides from element components are discussed; it is concluded that mechanical abrasion is most satisfactory. Edge welding of assemblies before rolling them is recommended to avoid oxidation of interfaces. The development of hotrolling procedures capable of insuring complete bonding of components is described; rolling and heattreatment schedules are presented in tabular form. Photomicrographs illustrating the recrystallization bonds obtained between core and clad and in the deadend portions of elements are included. A moderate amount of data is presented on the preparation of FeAl base matrix materials, using powder metallurgical techniques, Comparisons are made between methods of obtaining powdered alloys (elemental powders, master alloys, and other techniques). Pressures and sintering temperatures employed in iorming compacts are discussed. Also covered is the cold rolling of the sintered compacts. The bend ductility and oxidation resistance of the rolled strips is correlated with their metallurgical histories. Test results, photographs, and photomicrographs are included. (auth)

• Research Organization: The Martin Co., Baltimore
• NSA Number: NSA-13-013574
• OSTI ID: 4251596
• Journal Information: Am. Inst. Mining Met. Petrol. Engrs., Inst. Metals Div., Spec. Rept. Ser., Vol. Vol: 5, No. 7; Other Information: Orig. Receipt Date: 31-DEC-59
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

METALLURGY AND CERAMICS
ALUMINUM ALLOYS
ALUMINUM OXIDES
BONDING
BRITTLENESS
CARBON STEELS
CERMETS
CHROMIUM ALLOYS
CLEANING
COLD WORKING
COMPACTING
CROSS SECTIONS
DUCTILITY
FABRICATION
FUEL ELEMENTS
GAS COOLANT
HEAT TREATMENTS
HOT WORKING
IRON ALLOYS
JOINTS
MATERIALS TESTING
MECHANICAL PROPERTIES
MICROSCOPY
NIOBIUM ALLOYS
OXIDATION
PHOTOGRAPHIC FILM
PLATES
POWDER METALLURGY
PRESSURE
RECRYSTALLIZATION
REPROCESSING
ROLLING
SINTERING
STABILITY
STAINLESS STEELS
SURFACES
TABLES
TENSILE PROPERTIES
TITANIUM ALLOYS
URANIUM DIOXIDE
WEAR
WELDING