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Effect of Ion Irradiation on Dislocation Processes in Stainless Steel

Published online by Cambridge University Press:  14 December 2011

Josh Kacher ,
Grace S. Liu ,
May Martin  and
I.M. Robertson
Josh Kacher
Affiliation:
University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
Grace S. Liu
Affiliation:
University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
May Martin
Affiliation:
University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
I.M. Robertson
Affiliation:
University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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Abstract

The effects of ion irradiation damage on dislocation generation and propagation in austenitic stainless steels were studied by means of in situ transmission electron microscopy and electron tomography. Tensile samples were irradiated in situ to a dose on the order of 1017 ions/m2 with 1MeV Kr+ and strained at 300 K as well as 673 K. Dislocation motion through the irradiation-obstacle field was jerky and discontinuous, dislocation pile-ups formed in grain interiors and at boundaries, long straight dislocations were generated decorating the channel-matrix walls, and dislocation cross-slip within the channel created debris along the channel leading to channel widening. Electron tomography was applied for the first time to reveal new detail about the dislocation reactions in the channel wall.

Keywords

defectsdislocationstransmission electron microscopy (TEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1363: Symposium RR – Fundamental Science of Defects and Microstructure in Advanced Materials for Energy , 2011 , mrss11-1363-rr10-06
Copyright
Copyright © Materials Research Society 2011

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References

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