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, Vol. 47, Issue 12; Other Information: PBD: 29 Sep 1999; ISSN 1359-6454
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dislocations and mechanical properties of MgO-Al{sub 2}O{sub 3} spinel single crystals
Yield stress anomaly for {1/2}[{l{underscore}angle}112]{l{underscore}brace}111{r{underscore}brace} slip in {gamma}-titanium aluminide