Constrained deformation of molybdenum single crystals
High-purity molybdenum single crystals were deformed at room temperature in both free compression and plane strain compression. In free comparison, crystals were oriented with [100], [110], and [111] parallel to the compression axis. The orientations for plane strain compression were (110)[001], (110)[110], (100)[011], and (100)[010], with (hkl) being the plane of compression and [uvw] the elongation direction. Change in width of the specimen is suppressed by a channel. The resulting stress-strain (sigma-epsilon) curves were converted to resolved shear stress: resolved shear strain (tau-$gamma$) curves using the Taylor--Bishop--Hill analysis. It was found that the tau-$gamma$ curves do not form a narrow band if (110)[111] slip is assumed. A narrow band is formed, however, if asymmetric (112)[111] slip is assumed along with (110)[111] slip, with tau/sub 112H/ = tau$sub 110$ = 1.3 tau/sub 112E/, where tau$sub 110$, tau/ sub 112H/ and tau/sub 112E are the CRSS for (110) slip, (112) slip in the antitwinning sense, and (112) slip in the twinning sense respectively. Thus it may be concluded that the Schmid law is obeyed in high-purity Mo deformed at room temperature by assuming a combination of asymmetric (112)[111] and (110)[111] slip systems. (auth)
- Research Organization:
- Bell Labs., Murray Hill, NJ
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-020794
- OSTI ID:
- 4087357
- Journal Information:
- Acta Metall., v. 23, no. 12, pp. 1473-1478, Other Information: Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
Similar Records
Testing of soft-oriented NiAl single crystals in simple shear
Tension-compression asymmetry of the stress-strain response in aged single crystal and polycrystalline NiTi