Engine Titanium Consortium - Center for Nondestructive Evaluation ...
Engine Titanium Consortium - Center for Nondestructive Evaluation ...
Engine Titanium Consortium - Center for Nondestructive Evaluation ...
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Back-Wall Scan<br />
FBH scan<br />
20%<br />
57%<br />
49%<br />
48%<br />
48% 48%<br />
58% 59%<br />
22%<br />
13%<br />
18%<br />
20%<br />
28%<br />
31%<br />
79%<br />
64% 91%<br />
66% 94%<br />
27%<br />
31%<br />
42%<br />
79%<br />
82%<br />
33% 33%<br />
15%<br />
64% 70%<br />
22%<br />
19%<br />
(a)<br />
(b)<br />
87%<br />
Amplitude (%FSH)<br />
(c)<br />
Comparison of Normalized<br />
BW and FBH variations<br />
(13" Multizone Probe)<br />
90<br />
BW 13"MZ<br />
80<br />
FBH 13"MZ<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
Average <strong>for</strong> all sites = 50%<br />
0<br />
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14<br />
Measurement Site<br />
FBH Amplitude (% FSH)<br />
(d)<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
Correlation Between Norm'ed<br />
BW and FBH variations<br />
(13" Multizone Probe)<br />
y = 0.9909x<br />
R 2 = 0.6086<br />
Trendline thru origin<br />
0 10 20 30 40 50 60 70 80 90 100<br />
BW Amplitude (% FSH)<br />
Figure 2. Measurements on a Ti 6-4 billet segment using a 5-MHz 13”-multizone probe focused<br />
near the billet back wall, following the style of Figure 1. Beam diameters (-6 dB) near the back wall<br />
are approximately 150 mils x 540 mils (axial x hoop).<br />
Quarterly Report – January 1, 2002 –March 31, 2002<br />
print date/time: 6/6/2002 - 8:39 AM – Page 26
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