Atomistic modeling of nanosized Cr precipitate contribution to hardening in an Fe-Cr alloy

Title
Atomistic modeling of nanosized Cr precipitate contribution to hardening in an Fe-Cr alloy
Authors
심재혁김동익정우상조영환Brian D. Wirth
Keywords
Molecular dynamics; Irradiation; Nuclear reactor; Dislocation; Precipitate; Fe-Cr; Steel
Issue Date
2009-04
Publisher
JOURNAL OF NUCLEAR MATERIALS
Citation
VOL 386-388, 56-59
Abstract
Molecular dynamics simulations of the interaction between an edge dislocation and nanosized Cr precipitates in bcc Fe have been performed to investigate the hardening effect of a0 phases in high Cr ferritic/ martensitic steels. The critical resolved shear stress needed for an edge dislocation to overcome Cr precipitates of diameter between 3 and 6 nm is larger than for dislocation glide in the bcc Fe lattice containing 10% Cr solute atoms. This indicates that the precipitation of a0 phases leads to hardening in high Cr ferritic/martensitic steels. The MD simulations reveal that the interspacing of Cr precipitates plays a more crucial role in the hardening of Fe–Cr alloys than the precipitate size. An attractive interaction exists between an edge dislocation and nanosized Cr precipitates, which is evident as a decrease in total energy when an edge dislocation is placed within in a Cr precipitate.
URI
http://pubs.kist.re.kr/handle/201004/35176
ISSN
0022-3115
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE