Engine Titanium Consortium - Center for Nondestructive Evaluation ...
Engine Titanium Consortium - Center for Nondestructive Evaluation ...
Engine Titanium Consortium - Center for Nondestructive Evaluation ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
1.2<br />
1.0<br />
0.8<br />
V-DIE-A coupon "D" (axial view)<br />
Measured P(L) - x&y combined<br />
Low-L exponential fit (b = 11.50 microns)<br />
High L exponential fit (b = 9.26 microns)<br />
P(L)<br />
0.6<br />
0.4<br />
0.2<br />
0.0<br />
0 10 20 30 40 50 60<br />
L (microns)<br />
Figure 3. Examples of exponential fits to a measured P(L) curve. The blue curve is a fit to the<br />
lower half of the data (0 < L < 27 microns). The red curve is a fit to the upper half of the data (27 <<br />
L < 54 microns).<br />
Estimate along Y-direction .<br />
160<br />
140<br />
120<br />
100<br />
80<br />
60<br />
40<br />
20<br />
GRAIN DIAMETER ESTIMATES<br />
USING THE MCL METHOD<br />
GFMA<br />
V-DIE-A<br />
V-DIE-B<br />
WASP<br />
Equiaxed Grains<br />
(in microns)<br />
Estimate along Y-direction .<br />
40<br />
35<br />
30<br />
25<br />
20<br />
15<br />
10<br />
5<br />
GRAIN DIAMETER ESTIMATES<br />
USING THE MCL METHOD<br />
GFMA<br />
V-DIE-A<br />
V-DIE-B<br />
Equiaxed Grains<br />
(in microns)<br />
0<br />
0 20 40 60 80 100 120 140<br />
Estimate along X-direction<br />
0<br />
0 5 10 15 20 25 30 35 40<br />
Estimate along X-direction<br />
Figure 4. Comparisons of average grain diameters in the X and Y directions of the micrographs<br />
using the Mean Chord Length Method. Results are shown <strong>for</strong> analyses of 12 micrographs <strong>for</strong> each<br />
of 4 billet “strips”. The right-hand panel is a blow-up of the small diameter region where the IN718<br />
values lie.<br />
Quarterly Report – January 1, 2002 –March 31, 2002<br />
print date/time: 6/6/2002 - 8:39 AM – Page 8
Change language