Notch-tip deformation of Ni{sub 3}Al single crystals
Book
·
OSTI ID:571861
- Dartmouth Coll., Hanover, NH (United States). Thayer School of Engineering
In a recent paper on the deformation of notched polycrystals of Ni-rich Ni{sub 3}Al doped with boron, the authors showed that the notch sensitivity of this material is related to the suppression of plastic flow by the triaxial state of tensile stress induced by the notch. Cracks initiate on crystallographic slip planes at the tip of the notch, where the stress and inelastic strain are concentrated, and then propagate once the degree of triaxialty exceeds a critical level. The tensile strength appears to be controlled by crack initiation. To explore further the notch sensitivity of boron-doped Ni{sub 3}Al the authors performed new experiments using notched single crystals. This paper summarizes their observations.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-86ER45260
- OSTI ID:
- 571861
- Report Number(s):
- CONF-961202--
- Country of Publication:
- United States
- Language:
- English
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