Engine Titanium Consortium - Center for Nondestructive Evaluation ...

% FSH
Noise Measurements from flat side, water path = 1"
Maximum Gated Peak Noise, Gain = 57 dB, I3 probe
80
60
40
Gate1
Gate 2
Gate 3
Gate 4
20
0
Flat with
FBH in
back
Flat with
FBH in
front
0.75"
concave
2.0"
concave
8.0"
concave
4.0"
convex
10.0"
convex
THEORY
% FSH
80
60
40
20
Noise Measurements from flat side,water path=2.4"
Maximum Gated Peak Noise, Gain = 57 dB, I3 probe
Gate1
Gate 2
Gate 3
Gate 4
0
Flat with
FBH in
back
Flat with
FBH in
front
0.75"
concave
2.0"
concave
8.0"
concave
4.0" convex 10.0"
convex
THEORY
Figure 15. Measured and predicted maximum amplitudes in gated-peak noise C-scan images.
Results are shown for the four choices of the time gate (or depth zone) for each inspection water
path.
Synthetic Inclusion Disk
Machining of the forging continued following the initial evaluation of the as-forged piece described
in the previous quarterly report. Mike Gigliotti (GE-CRD) requested that the machined forging be
delivered to him with an excess material envelope of 0.25” on the outer diameter and 0.1” on the
forward and aft faces, outside the planned final dimensions. The machining and ultrasonic
inspection were planned in two stages. Initially the outside diameter (face UG) and four flat faces
Quarterly Report – January 1, 2002 –March 31, 2002
print date/time: 6/6/2002 - 8:39 AM – Page 50