Computer simulation of pencil glide in bcc metals

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5975696

Rollett, A D; Kocks, U F

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 Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5975696
• Report Number(s): LA-UR-87-3619; CONF-8708162-1; ON: DE88001802
• Resource Relation: Conference: 8. international conference on textures of materials, Santa Fe, NM, USA, 21 Aug 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
METALS
SLIP
TEXTURE
COMPUTERIZED SIMULATION
BCC LATTICES
DEFORMATION
EQUATIONS
GRAIN ORIENTATION
POLYCRYSTALS
SHEAR
STRESSES
TORSION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
CUBIC LATTICES
ELEMENTS
MICROSTRUCTURE
ORIENTATION
SIMULATION
360103* - Metals & Alloys- Mechanical Properties