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Electron-beam fusion welding of beryllium

Description: Ingot-sheet beryllium (Be) having three different chemistries and three different thicknesses was fusion-welded by the electron-beam process. Several different preheats were used to obtain 100% penetration and crack-free welds. Cracking susceptability was found to be related to aluminum (Al) content; the higher Al-content material was most susceptable. However, adequate preheat allowed full penetration and crack-free welds to be made in all materials tested. The effect of a post-weld heat treatment on the mechanical properties of these compositions was also determined. The heat treatment produced no significant effect on the ultimate tensile strength. However, the yield strength was decreased and the ductility was increased. These changes are attributed to the formation of AlFeBe/sub 4/ and FeBe/sub 11/.
Date: January 1, 1978
Creator: Campbell, R. P.; Dixon, R. D. & Liby, A. L.
Partner: UNT Libraries Government Documents Department

Advanced technologies for decontamination and conversion of scrap metal

Description: The Department of Energy (DOE) accumulated large quantities of radioactive scrap metal (RSM) through historic maintenance activities. The Decontamination and Decommissioning (D&D) of major sites formerly engaged in production of nuclear materials and manufacture of nuclear weapons will generate additional quantities of RSM, as much as 3 million tons of such metal according to a recent study. The recycling of RSM is quickly becoming appreciated as a key strategy in DOE`s cleanup of contaminated sites and facilities.
Date: December 1, 1995
Creator: Muth, T.R.; Shasteen, K.E. & Liby, A.L.
Partner: UNT Libraries Government Documents Department