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ANP PROJECT QUARTERLY PROGRESS REPORT
CREEP UNDER IRRADIATION
W. W. Davis J. C. Wilson
J. c. Zukas
Solid State Division
Additional cantilever creep tests
on Inconel with the standard ARE 2-hr,
1100°F anneal were carried out a t
1500°F in air atmospheres in the
graphite reactor and the LITR. As
shown in Figs. 14.1 and 14.2, there
are only small differences between the
bench and in-reactor tests. The upward
deflection after 400 hr in the curve
for the 3000-psi test in the ORNL
graphite reactor is probably due to
faulty operation of the temperature
controller. The results are to be
checked by postirradiation measure-
ments of the creep deflections 011 a
remotely con tro 11 ed pro fi lome ter.
188
-BENCH TEST
Postirradiation measurements were
made on specimens annealed at 1650°F
and irradiated in the graphite reactor
at 1500°F. Their creep curves were
shown in a previous report(') as curve
A, 1500 psi, and curve C, 2000 psi.
The profilometer measurements indicated
that. the large extensions which were
measured were in error and that the
actual extensions were not much
greater than those occurring in the
bench tests. Several tests reported
last quarter as being in progress were
negated by faulty microformers.
The design for the bellows-loaded
tensile creep test, in the MTR is near-
ing completion, and most, of the com-
ponents have been fabricated and
partly assembled for test.
(').I. C. Wilson. J. C. Zukas, and W. W. Davis,
ANP Quar. Frog. Rep. June 10, 1952, ORNL-1294.
p. 164.
SSD-A-499
DWG. i 7037A
0 200 400 600
TIME (hr)
Fig. 14.1. Cantilever Creep Tests on Ineonel in Air at 1500"~ and is00 psi.