Grain boundary motion assisted via radiation cascades in bcc Fe

被引：19

作者：

Campana, Carlos ^{[2
]}

Boyle, K. P. ^{[2
]}

Miller, Ronald E. ^{[1
]}

机构：

[1] Carleton Univ, Dept Mech & Aerosp Engn, Ottawa, ON K1S 5B6, Canada

[2] Nat Resources Canada, CANMET Mat Technol Lab, Ottawa, ON K1A 0G1, Canada

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.78.134114

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Molecular-dynamic simulations were performed to study the influence of displacement cascades on grain boundary (GB) structure and stability in bcc Fe. A Sigma=5, (310)[001] symmetric tilt boundary with a tilt angle of theta=36.9 degrees was used for the simulations. We find that GB motion, either sliding or migration, is activated under the influence of displacement cascades at lower internal stresses as compared to the unirradiated GBs. We postulate that radiation-induced GB damage aids the nucleation mechanisms that trigger GB motion. Furthermore, radiation-induced GB sliding significantly relaxes internal stress and may provide a viable mechanism for promoting irradiation creep via GB accommodation processes.

引用

页数：8

共 35 条

[1] Applications of local crystal structure measures in experiment and simulation [J].

Ackland, GJ ;

Jones, AP .

PHYSICAL REVIEW B, 2006, 73 (05)

[2] Two-band second moment model for transition metals and alloys [J].

Ackland, Graeme J. .

JOURNAL OF NUCLEAR MATERIALS, 2006, 351 (1-3) :20-27

[3]

[Anonymous], 2002, GIF-002-00

[4] Modelling atomic scale radiation damage processes and effects in metals [J].

Bacon, DJ ;

Osetsky, YN .

INTERNATIONAL MATERIALS REVIEWS, 2002, 47 (05) :233-241

[5] Radiation-induced material changes and susceptibility to intergranular failure of light-water-reactor core internals [J].

Bruemmer, SM ;

Simonen, EP ;

Scott, PM ;

Andresen, PL ;

Was, GS ;

Nelson, JL .

JOURNAL OF NUCLEAR MATERIALS, 1999, 274 (03) :299-314

[6] A MOLECULAR-DYNAMICS STUDY OF DISPLACEMENT CASCADES IN ALPHA-IRON [J].

CALDER, AF ;

BACON, DJ .

JOURNAL OF NUCLEAR MATERIALS, 1993, 207 :25-45

[7] ION-ELECTRON INTERACTION IN MOLECULAR-DYNAMICS CASCADES [J].

CARO, A ;

VICTORIA, M .

PHYSICAL REVIEW A, 1989, 40 (05) :2287-2291

[8] Classical many-body potential for concentrated alloys and the inversion of order in iron-chromium alloys [J].

Caro, A ;

Crowson, DA ;

Caro, M .

PHYSICAL REVIEW LETTERS, 2005, 95 (07)

[9] Multiscale modelling of plastic flow localization in irradiated materials [J].

de la Rubia, TD ;

Zbib, HM ;

Khraishi, TA ;

Wirth, BD ;

Victoria, M ;

Caturla, MJ .

NATURE, 2000, 406 (6798) :871-874

[10] THERMAL EXCITATION OF ELECTRONS IN ENERGETIC DISPLACEMENT CASCADES [J].

FINNIS, MW ;

AGNEW, P ;

FOREMAN, AJE .

PHYSICAL REVIEW B, 1991, 44 (02) :567-574

← 1 2 3 4 →