57 citations · 57 across the 8 of their papers we have counts for
6 papers
Symmetry-adapted single crystal yield criterion for non-Schmid materials
Roman Gröger
All yield criteria that determine the onset of plastic deformation in crystalline materials must be invariant under the inversion symmetry associated with a simultaneous change of…
Breakdown of the Schmid law in bcc molybdenum related to the effect of shear stress perpendicular to the slip direction
R. Gröger, V. Vitek
The breakdown of the Schmid law in bcc metals has been known for a long time. The asymmetry of shearing in the slip direction <111> in the positive and negative sense, respectively…
Multiscale modeling of plastic deformation of molybdenum and tungsten: III. Effects of temperature and plastic strain rate
R. Gröger, V. Vitek
In this paper we develop a link between the atomic-level modeling of the glide of 1/2<111> screw dislocations at 0 K and the thermally activated motion of these dislocations via nu…
Multiscale modeling of plastic deformation of molybdenum and tungsten: II. Yield criterion for single crystals based on atomistic studies of glide of 1/2<111> screw dislocations
R. Gröger, V. Racherla, J. L. Bassani +1
Based on the atomistic studies presented in Part I we develop analytical yield criteria for single crystals that capture the effect of shear stresses other than the Schmid stress (…
Multiscale modeling of plastic deformation of molybdenum and tungsten: I. Atomistic studies of the core structure and glide of 1/2<111> screw dislocations at 0 K
R. Gröger, A. G. Bailey, V. Vitek
Owing to their non-planar cores 1/2<111> screw dislocations govern the plastic deformation of BCC metals. Atomistic studies of the glide of these dislocations at 0 K have been perf…
Explanation of the discrepancy between the measured and atomistically calculated yield stresses in body-centered cubic metals
R. Groger, V. Vitek
We propose a mesoscopic model that explains the factor of two to three discrepancy between experimentally measured yield stresses of BCC metals at low temperatures and typical Peie…