Anisotropy of the critical resolved shear stress of a superalloy containing 6 vol.% L1{sub 2}-ordered {gamma}{prime}-precipitates
- Universitaet Muenster (Germany). Institut fuer Metallforschung
Single crystals of the {gamma}{prime}-strengthened nickel-base superalloy NIMONIC PE16 have been compression tested in the temperature range 683--1,143 K. Four different orientations of the specimens have been studied: [0 0 1], [{bar 1}23], [011] and [{bar 1}11]. They were either in the homogenized, single-phase state or in the peak-aged state. The critical resolved shear stress (CRSS) of the homogenized specimens was isotropic at 683 K. The CRSS of the peak-aged specimens, containing 6 vol.% of L1{sub 2}-long-range ordered {gamma}{prime}-precipitates of 25 nm radius, was anisotropic at 683 K and at 989 K: the [001]-oriented specimens were the shortest ones, the CRSS increased as the orientation moved towards [011] or [{bar 1}11]. This is the same orientation dependence found for the CRSS of single-phase L1{sub 2}-ordered materials. The interpretation of the anisotropy of the CRSS of NIMONIC PE16 follows that given single-phase L1{sub 2}-long-range ordered materials.
- OSTI ID:
- 105978
- Journal Information:
- Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 9 Vol. 43; ISSN 0956-7151; ISSN AMATEB
- Country of Publication:
- United States
- Language:
- English
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