Title: EXTRUSION CHARACTERISTICS OF URANIUM-ZIRCONIUM AND URANIUM-CARBON ALLOYS
Abstract:Extrusion characteristics were determined for a series of uranium - zirconium and uranium -carbon alloys in the range of 0 to 2 wt% zirconium and 40 to 1600 ppm carbon. Small zirconium additions to th...Extrusion characteristics were determined for a series of uranium - zirconium and uranium -carbon alloys in the range of 0 to 2 wt% zirconium and 40 to 1600 ppm carbon. Small zirconium additions to the uranium rapidly increased the extrusion coefficient whereas carbon additions only resulted in a gradual increase. Heat-treated material had a lower extrusion coefficient than the as- cast alloys. In each case the extruded material was softer than the unextruded metal. There was no appreciable hardness change in the uranium as the carbon content increased; however, the uranium-zirconium alloys became harder with an increasing zirconium content. A uniform clad thickness was observed on all extruded heat-treated alloys above 0.25 wt% zirconium and 900 ppm carbon. Excessive clad thickness variation was observed on all the extruded ascast material except the 2 wt% zirconium alloy. A de creasing grain size was observed as the zirconium content increased. Heat treatment reduced this grain size still further. Some grain refinement was observed in the 1600 ppm carbon alloy, but none in the other uranium -carbon alloys. Excessive carbon in the zirconium - uranium alloys caused formation of a zirconium carbide in preference to the formation of zirconium-uranium compounds. When the carbidemore » formed, the metal behaved differently than either the uranium-carbon or uranium-zirconium alloys. (auth)« lessRead More
Publication Year: 1961
Publication Date: 1961-06-01
Language: en
Type: article
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Title: $EXTRUSION CHARACTERISTICS OF URANIUM-ZIRCONIUM AND URANIUM-CARBON ALLOYS
Abstract: Extrusion characteristics were determined for a series of uranium - zirconium and uranium -carbon alloys in the range of 0 to 2 wt% zirconium and 40 to 1600 ppm carbon. Small zirconium additions to the uranium rapidly increased the extrusion coefficient whereas carbon additions only resulted in a gradual increase. Heat-treated material had a lower extrusion coefficient than the as- cast alloys. In each case the extruded material was softer than the unextruded metal. There was no appreciable hardness change in the uranium as the carbon content increased; however, the uranium-zirconium alloys became harder with an increasing zirconium content. A uniform clad thickness was observed on all extruded heat-treated alloys above 0.25 wt% zirconium and 900 ppm carbon. Excessive clad thickness variation was observed on all the extruded ascast material except the 2 wt% zirconium alloy. A de creasing grain size was observed as the zirconium content increased. Heat treatment reduced this grain size still further. Some grain refinement was observed in the 1600 ppm carbon alloy, but none in the other uranium -carbon alloys. Excessive carbon in the zirconium - uranium alloys caused formation of a zirconium carbide in preference to the formation of zirconium-uranium compounds. When the carbidemore » formed, the metal behaved differently than either the uranium-carbon or uranium-zirconium alloys. (auth)« less