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Title: Computer simulation of pencil glide in bcc metals

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
5975696
Report Number(s):
LA-UR-87-3619; CONF-8708162-1
ON: DE88001802
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
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
Subject:
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

Citation Formats

Rollett, A D, and Kocks, U F. Computer simulation of pencil glide in bcc metals. United States: N. p., 1987. Web.
Rollett, A D, & Kocks, U F. Computer simulation of pencil glide in bcc metals. United States.
Rollett, A D, and Kocks, U F. 1987. "Computer simulation of pencil glide in bcc metals". United States. https://www.osti.gov/servlets/purl/5975696.
@article{osti_5975696,
title = {Computer simulation of pencil glide in bcc metals},
author = {Rollett, A D and Kocks, U F},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/5975696}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Conference:
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