Ideal strengths of bcc metals
Journal Article
·
· Materials Science and Engineering A
OSTI ID:803750
- LBNL Library
We present ab initio ideal strength calculations in body-centered cubic (bcc)tungsten for 'pencil-glide' slip on {r_brace}110{l_brace}, {r_brace}112{l_brace}, and {r_brace}123{l_brace} planes and for the {r_brace}100{l_brace} cleavage strength. We use these results to analyze the tensile strengths of other bcc metals. In all bcc metals, the minimum shear strength on any plane containing <111> is {approx} 0.11/S-sub <111>, where S-sub <111> is the elastic compliance for any shear in a <111> direction. The ideal cleavage strength on {r_brace}100{l_brace} for many bcc metals is {approx} 0.083/s-sub 11 where s-sub 11 is the single crystal elastic compliance. Comparison of the ideal shear and tensile strengths offers a measure of the inherent ductility or brittleness of a material.
- Research Organization:
- Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 803750
- Report Number(s):
- LBNL--45031
- Journal Information:
- Materials Science and Engineering A, Journal Name: Materials Science and Engineering A Journal Issue: SI Vol. 319
- Country of Publication:
- United States
- Language:
- English
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