Metallurgy Division - Semiannual Progress Rpt [Apr 10, 1956]

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6* concentrotion i s not across small sodium gaps i s a serious problem a t temperatures in excess o f 12OOOF. As a r e s u l t of these findings, a study i s underway t o determine the effect of temperature and gap size o n the a l l o y i n g o f beryllium with Inconel. Layers of BeNi a. 2E. E. Hoffman et a [ . , A N P uar. Prog. Rep. S e p t . 10, p 29; G. , A N P Quar. Prog. R e p . D e c . 10, 1954, ORNL-1816, p 78. 1954, ORNL-1771, ...................... .. ... .. .. ......... .. 0 135 30-40 'This apparent increase in sodium significont.

5 mil. 3. The specimen tested in lithium was attacked throughout the grain boundaries, which were 34- 35 apparently aluminum-rich regions. grains. 4. 009%) during the test, and metallographic examination revealed no attack. ,9 .. 6€. E. Hoffman e t al.. ANP Qua?. P m g . R e p . Sept. 10, 1954, ORNL-1771, p 83. .. ............... .. ............... 1 00 000 0 D*O 0 / 0 00 Gentle tapping c a u s e d t h e s p e c i m e n to b r e a k up i n t o i n d i v i d u a l 00 0 0 a 008 00 META L L U R C Y PROGRESS R E P O R T 20% Mo-20% F e alloy.

46 and 47); i t was found that the gray-black color extended throu+out the specimens and i s taken as evidence that the sodium completely penetrated the specimens, probably along the pore spaces. Powder x-ray diffraction patterns of untested and pieces of the Sm203 and o f the two Lindsay M i x specimens did not reveal any reaction products. ( . Chemical analyses of the sodium baths indicated negligible quantities of chromium, nickel, iron, or the rare earths, which supports the conclusion that the attack on the rare-earth oxides and on the lnconel capsules was negligible.

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