Compliance to Schmid's law in the stress anomaly regime of binary stoichiometric Ni{sub 3}Al
Using single crystals of binary stoichiometric Ni{sub 3}Al, the orientation dependence of the critical resolved shear stress (CRSS) for {l{underscore}brace}111{r{underscore}brace}{l{underscore}angle}{bar 1}01{r{underscore}angle} slip and the tension/compression (T/C) asymmetry were studied in the yield stress anomaly regime. Unlike the case in ternary alloys, it was found that Schmid's law holds and the T/C asymmetry vanishes in stoichiometric Ni{sub 3}Al. This indicates that plastic deformation occurs according to Schmid's law in the highly ordered state. Also, the violation of Schmid's law and the T/C asymmetry, which were believed to be inherent to the stress anomaly so far, are considered to be additional effects due to the anti-site defects or specific ternary elements. The results are consistent with the idea that the CRSS is controlled by the dislocation multiplication in (111).
- Research Organization:
- National Research Inst. for Metals, Tsukuba, Ibaraki (JP)
- OSTI ID:
- 20000486
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 12 Vol. 47; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
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