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Atomistic Study on Nano Stress-Strain Curves of α-Fe

Published online by Cambridge University Press:  10 February 2011

Shenyang Hu ,
Matthias Ludwig ,
Liam Farrissey  and
Siegfried Schmauder
Shenyang Hu
Affiliation:
Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, Pfaffenwaldring 32, D-70569 Stuttgart, Germany
Matthias Ludwig
Affiliation:
Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, Pfaffenwaldring 32, D-70569 Stuttgart, Germany
Liam Farrissey
Affiliation:
Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, Pfaffenwaldring 32, D-70569 Stuttgart, Germany
Siegfried Schmauder
Affiliation:
Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, Pfaffenwaldring 32, D-70569 Stuttgart, Germany
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Abstract

The atomistic processes and stress-strain-curves during uniaxial tensile deformation of a single α-Fe nanocrystal have been studied with the molecular static method. Periodic boundary conditions are imposed along one direction perpendicular to the tensile axis to model plane strain conditions. The effects of the model sizes in plane, boundary conditions and crystal orientations on the stress-strain curves are systematically analyzed. Various deformation evidences such as dislocation movement, dislocation piling up and twinning are clearly observed. The deformation and fracture characteristics of a-Fe and their dependencies on the boundary conditions are investigated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 492: Symposium S – Microscopic Simulation of Interfacial Phenomena in Solids… , 1997 , 395
Copyright
Copyright © Materials Research Society 1998

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References

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