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- W139820291 abstract "This study demonstrates that an in situ nondestructive, ultrasonic surface wave technique can successfully detect the onset and extent of matrix cracking fatigue damage in a titanium metal matrix composite (MMC). A quasi-isotropic [0/±45/90]s SCS-6/Timetal®21S MMC material was used for room temperature fatigue tests and the resultant matrix cracking damage was ultrasonically monitored in situ as a function of cycle count. Damage accumulation in the material was successfully correlated with decreases in ultrasonic pitch catch amplitude and verified through the use of immersion ultrasonic C-scans and metallographic techniques. Damage initiation and progression was tracked through the use of complementary nondestructive and destructive techniques. The in situ surface wave data show that the higher the fatigue stress level, the more quickly damage occurs; conversely, the lower the stress level, the slower the damage initiation. The in situ surface wave technique proved to be more sensitive to the accumulating damage than standard load-displacement modulus measurements. The surface wave technique also indicated a change in material properties after only one fatigue cycle. The data acquired show that a better understanding of damage initiation and accumulation can be gained using the in situ surface wave technique in comparison to current load-displacement modulus measurements." @default.
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- W139820291 date "1995-01-01" @default.
- W139820291 modified "2023-09-25" @default.
- W139820291 title "Evaluation of Mechanical Fatigue Damage Accumulation in Metal Matrix Composites Using Ultrasonic Surface Waves" @default.
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- W139820291 doi "https://doi.org/10.1007/978-1-4615-1987-4_168" @default.
- W139820291 hasPublicationYear "1995" @default.
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