DISCLAIMERPortions of this document may be illegible in electronic image products. Images are produced from the best available original document. PREFACE"Constitution of Uranium and Thorium Alloys" (BMI-1300) s u p e rs e d e s "Compilation of US and UK Uranium and Thorium Constitution D i a g r a m s " (BMI-1000). m a t . The original "Compilation" h a s been used extensively and h a s been reprinted. ance of the original work implies acceptance of the concept and approach. attempt to provide an even m o r e useful r e f e r e n c e piece. e c e s s o r , t h i s work was written with the cooperation of r e p r e s e n t a t i v e s of the United Kingdom.It i s a new r e f e r e n c e piece in a modified f o r -The p r e s e n t a u t h o r s believe that this degree of acceptAs a r e s u l t , they have undertaken this "Compilation" i n a n Like i t s p r e d -The modified Metals Handbook s y s t e m of notation f o r the diag r a m s employed i n BMI-1000 w a s again used i n p r e p a r i n g these constitutional diagrams. The symbols a / o f o r atomic p e r cent and w / o for weight p e r cent have been used. In keeping with the g e n e r a l convention, p h a s e s have been designated beginning with the base. The inconvenience of having two alpha phases, alpha A and alpha B, i n the s y s t e m A -B is thereby obviated. Some slight but e a s i l y reconciled confusion m a y e x i s t with previous data w h e r e the d i a g r a m m a y have been developed f o r the s y s t e m B -A. T h i s "Compilation" is divided into two m a j o r sections, u r a n i u m alloys and thorium alloys. c u s s i o n of the t r a n s f o r m a t i o n and melting t e m p e r a t u r e s of the b a s e metal. Following the discussion a r e the v a r i o u s s y s t e m s i n alphabetical order. The m a j o r sections include both binary and t e r n a r y systems.basis of whether o r not constitutional d i a g r a m s w e r e available. t h i s "Compilation" i t w a s determined that l e s s weight should be given to the p r e s e n c e o r absence of a d i a g r a m and that utilization of the information was m o s t readily accomplished by a completely alphabetical listing.The m a j o r sections a r e preceded by a disIn the previous edition the s y s t e m s w e r e s e p a r a t e d on the F o r Generally, only unclassified r e f e r e n c e s have been used. Howe v e r , because the unclassified l i t e r a t u r e is incomplete f o r s e v e r a l s y s t e m s , some classified r e f e r e n c e s a r e given. It is believed that future declassifications m a y m a k e many now-classified r e f e r e n c e s readily available. H i s i n t e r e s t s and efforts i n bringing the origi- ACKNOWLEDGMENTS 4T h e authors a r e indebted to m a n y of the p e r s o n n e l of the U. S. AEG and its cont r a c t o r s . The presentation is basically a cooperative effort. P a r t i c u l a r thanks are due E. E p r e m i a n , f o r m e r l y of the U. S. AEC R e s e a r c h Division; G. K. URANIUM-PALLADIUM. . . URANIUM-PHOS...

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