Ambient and elevated temperature fracture and cyclic-fatigue properties in a series of Al-containing silicon carbides Page: 48 of 86
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1500 _ __ so* * I
09
0x
x 60
E 1000 30 3ABC
0.00 0.04 0.00 1 1.
c 500 -; Xe " *"
e A a A mrst r 5ABC
a. 0
-E -500 - Xe 00 , "
N. x x ,xx* * " *
ino = to6.22 Mam f o 6. x T
-1000 -
j traction free opening
-1500
0.0 0.4 0.8 1.2 1.6
Distance Behind Crack Tip, a-x (mm)
Fig. 2.8. Comparison of the crack-opening profiles for a monotonically-loaded crack in
the 3ABC and 5ABC microstructure after R-curve testing. Samples were loaded in situ
in a field-emission FESEM to an applied driving force of 6.2 MPadm. The inset shows
the curve fit for the first 70 m behind the crack tip, where the solid line is for 5ABC
(Ktip=1.6 MPaIm), and the broken line for 3ABC (Ktip=2.5 MPaIm).38
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Yuan, Rong. Ambient and elevated temperature fracture and cyclic-fatigue properties in a series of Al-containing silicon carbides, thesis or dissertation, August 30, 2004; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc787712/m1/48/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.