Computer simulation of pencil glide in bcc metals
An existing computer code for simulation of texture development in polycrystals has been modified to model ''pencil glide'' as observed in some bcc metals. Pencil glide can be thought of as a limiting case where the slip direction is restricted to (111) directions but the slip plane is arbitrary. The existing code simulates ''restricted glide'', i.e., (111)(110) slip systems, by using the Bishop-Hill method to find the ative vertex of the single crystal yield surface for each grain. It then corrects this trial solution by using a nonlinear viscous law based on the total (111)-resolved stress component. Only a small increase in computation time required is required compared to restricted glide. The results of the pencil glide modification of the code are that the texture development in tension is essentially the same as for restricted glide but that significant differences appear in plane strain compression (rolling). The Taylor Factor in tension for a random polycrystal is found to be 2.74. 20 refs., 5 figs., 1 tab.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5975696
- Report Number(s):
- LA-UR-87-3619; CONF-8708162-1; ON: DE88001802
- Country of Publication:
- United States
- Language:
- English
Similar Records
An experimental statistical analysis of stress projection factors in BCC tantalum
Effect of non-glide components of the stress tensor on deformation behavior of bcc transition metals
Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
BCC LATTICES
COMPUTERIZED SIMULATION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
CUBIC LATTICES
DEFORMATION
ELEMENTS
EQUATIONS
GRAIN ORIENTATION
METALS
MICROSTRUCTURE
ORIENTATION
POLYCRYSTALS
SHEAR
SIMULATION
SLIP
STRESSES
TEXTURE
TORSION