Engine Titanium Consortium - Center for Nondestructive Evaluation ...

Probe
Diameter,
in
Probe
Diameter, cm
Probe Radius
of Curvature, in
Probe Radius
of Curvature,
cm
Transducer #1 0.92 2.34 5.77 14.66
Transducer #2 1.88 4.78 11.22 28.50
Transducer #3 2.80 7.11 16.70 42.42
Table 1. Designed transducer parameters.
7/16" Zone Size, 3-transducer inspection, 4" coverage
Zone From To Transducer # Water path, in Water path, cm
in in
Maximum beam
diameter within
the zone, in
1 0.0000 0.4375 1 4.8 12.19 0.046
2 0.4375 0.8750 1 3.0 7.62 0.045
3 0.8750 1.3125 1 1.2 3.05 0.045
4 1.3125 1.7500 2 4.8 12.19 0.045
5 1.7500 2.1875 2 3.0 7.62 0.044
6 2.1875 2.6250 2 1.2 3.05 0.044
7 2.6250 3.0625 3 4.8 12.19 0.045
8 3.0625 3.5000 3 3.0 7.62 0.044
9 3.5000 3.9375 3 1.2 3.05 0.044
Table 2. Designed inspection scheme to achieve #1/2 FBH sensitivity throughout 4” of Ti 6-4
forging material. The scheme uses three transducers and has nine zones, each 7/16” wide.. Each
transducer covers three zones using three different water paths.
Phased Array Inspection Development
Significant progress was made on the design of the phased array transducer that will be used to
make a test of #1/2 FBH inspection sensitivity with currently available technology. In addition to
discussion at the monthly conference call, a separate conference call was held with a subteam to
discuss the transducer design that is being performed at ISU. The design has progressed to a
state allowing discussion with transducer manufacturers for placement of an order by P&W.
Figure 8 shows the most recent design for the F6 transducer that will allow focussing to a depth of
3.2 inches as required by the selection of the OEM forgings for inspection demonstration in this
sub-task. Several modifications of the design have occurred and these were due primarily to
compromises that had to be made from the ideal design to allow for the limitations of existing
Quarterly Report – January 1, 2002 –March 31, 2002
print date/time: 6/6/2002 - 8:39 AM – Page 65