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MODELING OF NANOINDENTATION AND MICROSTRUCTURAL DUCTILE BEHAVIOR IN METALLIC MATERIAL SYSTEMS

Published online by Cambridge University Press:  01 February 2011

Jeong Beom Ma ,
W. Ashmawi ,
M. A. Zikry ,
D. Schall  and
D. W. Brenner
Jeong Beom Ma
Affiliation:
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695–7910
W. Ashmawi
Affiliation:
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695–7910
M. A. Zikry
Affiliation:
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695–7910
D. Schall
Affiliation:
Department of Materials Science and Engineering North Carolina State University, Raleigh, NC 27695–7910
D. W. Brenner
Affiliation:
Department of Materials Science and Engineering North Carolina State University, Raleigh, NC 27695–7910
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Abstract

Specialized large-scale computational finite-element and molecular dynamic models have been used to understand and predict how dislocation density emission and contact stress fields due to nanoindentation affect inelastic deformation evolution at scales that span the molecular to the continuum level in ductile crystalline systems. Dislocation density distributions and local stress fields have been obtained for different crystalline slip-system and grain-boundary orientations. The interrelated effects of grain-boundary interfaces and orientations, dislocation density evolution and crystalline structure on indentation inelastic regions have been investigated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 841: Symposium R – Fundamentals of Nanoindentation and Nanotribology III , 2004 , R11.9
Copyright
Copyright © Materials Research Society 2005

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References

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