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PERIOD ENDING DECEMBER 70, 7954
TABLE 6.6. RESULTS OF STATIC TESTS OF BRAZED A-NICKEL T-JOINTS IN
NaF-ZrF4-UF4 (53.5-40-6.5 mole X) AT 150OoF FOR 100 hr
Brazing Alloy Weight Weight
Corn pas it i on Change Change Metal lographic Notes
(wt %) (9) (%)
69 Ni-20 Cr-11 Si -0.0017 -0.055
100 cu -0.0006 -0.019
82 Au-18 Ni -0.001 -0.036
80 Au-20 Cu
90 Ni-10 P -0.0004 -
60 Pd-40 Ni -0.0016 -
60 Pd-37 Ni-3 Si + 0.0008 + 0.027
Surface attack to a depth of 16 mils along entire braze fillet
Surface attack to a depth of 0.5 mil along entire braze fillet
Braze fillet appeared to be unattacked
No attack on braze fillet surface
No attack on braze fillet surface
No attack on braze fillet surface
No attack on braze fillet surface
TABLE 6.7. RESULTS OF STATIC TESTS OF BRAZED A-NICKEL T-JOINTS IN
SODIUM HYDROXIDE FOR 100 hr AT 1100 AND 150OoF
4 Brazing Allay Weight Weight Test
%- Composition Change Change Temperature Metallographic Notes
- * (wt %) (9) (%I (OF)
t-
+3
d
- . t
69 Ni-20 Cr-11 Si 1500 Braze failed completely
+ 0.0024 + 0.093 1100 Braze ottacked completely
100 cu - .0.0118 -0.408 1500 Braze attacked completely; large voids appear
throughout
-0.001 1 -0.038 1100 Uniform surface attack on braze to a deDth of 3 mils
82 Au-18 Ni -0.00.4 -0.144 1500 Nonuniform surface attack on braze to depth of 1 mil
-0.0007 -0.022 1100 No attack on surface of braze
60 Pd-3 of 6 mills
J
83