ORNL-4191 - the Molten Salt Energy Technologies Web Site

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EXP HEAT 168-0% Zr
t-
L
z 100 i ,
e
0 3
n 80
Id
u
EXP HEAT 171 - 0 5% Zr
224
EXP HEAT 169 - 0 4 % Zr
,
- I 1 1
EXP HEAT 474-1% Zr -0.1% Re I
EXP HEAT 170 -0.3 % Zr i
ORNL--DWG 61 (1837
EXP HEAT 115 ---1% Lr - 4 % Re
4400 1800 2200 2600 4400 1800 2200 2600 1400 1800 2200 2600
TESTING TEMPERATURE (OF)
Fig. 18.6. Results of the Hot-Ductility Study Showing the Effect of Zirconium on the Modified Hastelloy N.
Symbols: O.H., tested on heating; O.C., tested on ccoling.
URNL-DWG 67 11838
ALLOY NOKlhiAL COMPOSITION (wt %I
NI Mo Cr Fe Zr
168 BAL i2 7
474 BAL 12 7 05
”O
MSRE GRADE
HASTELLOY N BAL 46 7
r T E S T E b I N G
4
80
60
- 40
a-”
I
5 20
lx
a
r- O
z 100
0
0
3 80
a
1.1
TESTED ON COOLING
IT MSRF GRADE HN
60
40
20
0
1409 1600 1800 2000 2200 2400
TEST TEMPERATURE F)
Fig. 18.7. The Hot-Ductility Results of Selected
Alloys.
circular weld beads was 6 in. (see Fig. 18.8). The
welds were made with stationary inert-gas tungsten
arc torches while the disk rotated around its center
in a vertical plane. This technique was selected
in order to minimize the bending effect associated
with the transverse shrinkage. For the radius and
thickness ratio of our specimen, it is correct to
assume that the stress distribution associated
with the weld shrinkage is planar. The perpendicular
shrinkage is negligible; that is, there are
no stresses perpendicular to the plane of the disk.
With these assumptions, the stress distribution
may be determined by measuring only the tangential
strain on the rim of the disk while machining
a series of concentric sections beginning at the
disk center.
We followed essentially the “boring Sachs”
nrethod which was set up for pipes. Since plane
,