Compressive flow stress of a binary stoichiometric Ni{sub 3}Al single crystal
- National Research Inst. for Metals, Tsukuba, Ibaraki (Japan)
Ni{sub 3}Al exhibits the yield stress anomaly, i.e. its flow stress increases with increasing temperature. The yield stress anomaly has been extensively studied using single crystals. These studies have been carried out on Ni-rich or ternary Ni{sub 3}Al whereas the mechanical properties of a binary stoichiometric Ni{sub 3}Al single crystal that do not contain ternary additions have never been evaluated. Since deviations from stoichiometry or ternary elements essentially produce point defects, the nature of the yield stress anomaly can be affected by these. Therefore it is worth studying Ni{sub 3}Al deformation mechanisms using a binary stoichiometric single crystal. Very recently the authors have found that large binary stoichiometric Ni{sub 3}Al single crystals can occasionally be grown using a floating zone (FZ) method. The present paper reports the orientation dependence of the compressive flow stress of such crystals at 293--1,273 K for testing axis between [001] and [011].
- OSTI ID:
- 556512
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 11 Vol. 37; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
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