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Microstructural Modeling of Failure Modes in Martensitic Steel Alloys

Published online by Cambridge University Press:  26 September 2011

P. SHANTHRAJ ,
T. M. HATEM  and
M.A. ZIKRY
P. SHANTHRAJ
Affiliation:
Dept. of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695-7910
T. M. HATEM
Affiliation:
Dept. of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695-7910
M.A. ZIKRY
Affiliation:
Dept. of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695-7910
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Abstract

A unified physically-based representation of the microstructure in martensitic steels is developed to investigate its effects on the initiation and evolution of failure modes at different physical scales that occur due to a myriad of factors, such as texture, grain size and shape, grain heterogeneous microstructures, and grain boundary (GB) misorientations and distributions. The microstructural formulation is based on a dislocation-density based multiple-slip crystal plasticity model that accounts for variant distributions, orientations, and morphologies. This formulation is coupled to specialized finite-element methods to predict the scale-dependent heterogeneous microstructure, and failure phenomena such as shearstrain localization, and void coalescence.

Keywords

steeldislocationsmicrostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1296: Symposium O – New Methods in Steel Design—Steel Ab Initio , 2011 , mrsf10-1296-o05-10
Copyright
Copyright © Materials Research Society 2011

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References

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