Read Online or Download Metallurgy Division - Quarterly Prog Rpt [Apr 30, 1952] [Declassified] PDF
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Additional info for Metallurgy Division - Quarterly Prog Rpt [Apr 30, 1952] [Declassified]
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I t may b e n o t e d t h a t t h e o u t e r holes of header e do not contain welded t u b i n g . The d i s t a n c e f r o m t h e tube p e r i p h e r y t o header edge i n t h i s This distance c a s e was 0 . 0 5 0 i n c h . upset the uniformity of the heat flow p a t t e r n , and n o w e l d i n g c o n d i t i o n s were f o u n d t h a t w o u l d g i v e s a t i s f a c t o r y welds. The a p p l i c a t i o n o f w e l d i n g c o n d i t i o n b t o weld f , which i s i d e n t i c a l i n geometry with weld e, was a l s o u n s a t i s f a c t o r y when a p p l i e d t o the outer holes.
FOR P E R I O D ENDING A P R I L 3 0 , 1 9 5 2 , (a) %in. I - d i a e x t r u d e d r o d ; m i d d l e of e x t r u d e d l e n g t h (U9-X4) (6) 9 / 1 0 - i n . - d i a e x t r u d e d r o d ; m i d d l e o f e x t r u d e d l e n g t h (UlO-XS) (c) 5 / 8 - i n . - d i a e x t r u d e d r o d ; m i d d l e o f e x t r u d e d l e n g t h (U12-X6) Longitudinal Sections Tr a n s v e r s e Se c t i on s F i g . 23. Photomicrographs Showing t h e Completely R e c r y s t a l l i z e d Grain S t r u c t u r e o f A l p h a - E x t r u d e d Uranium Rod i n A n n e a l e d C o n d i t i o n ( 1 h r a t 5 5 0 O C ) .
Bora1 c o r e s and c o p p e r c o a t e d s t a i n l e s s s t e e l c l a d d i n g were r o l l e d a t 600°C t o e n s u r e good b o n d i n g . A t t h i s temperature the Boral w a s reduced p r e f e r e n t i a l l y and b u i l t u p s u f f i c i e n t p r e s s u r e a h e a d of t h e r o l l s t o b u r s t t h e l a m i n a t e s a f t e r f o u r or five passes. M o d e r a t i o n of t h e r o l l i n g s c h e d u l e s e e m e d i n e f f e c t i v e when t h e t o t a l r e d u c t i o n e x c e e d e d 30%.
