The formation and structure of Fe-Mn-Ni-Si solute clusters and G-phase precipitates in steels

被引：34

作者：

King, D. J. M. ^{[1
]}

Burr, P. A. ^{[2
]}

Middleburgh, S. C. ^{[3
,5
]}

Whiting, T. M. ^{[1
]}

Burke, M. G. ^{[4
]}

Wenman, M. R. ^{[1
]}

机构：

[1] Imperial Coll London, Ctr Nucl Engn, London SW7 2AZ, England

[2] Univ New South Wales, Sch Elect Engn, Kensington, NSW 2052, Australia

[3] Westinghouse Elect Sweden AB, SE-72163 Vasteras, Sweden

[4] Univ Manchester, Mat Performance Ctr, Sackville St Campus, Manchester M13 9PL, Lancs, England

[5] Bangor Univ, Nucl Futures Inst, Dean St, Bangor LL57 1UT, Gwynedd, Wales

来源：

JOURNAL OF NUCLEAR MATERIALS | 2018年 / 505卷

基金：

英国工程与自然科学研究理事会;

关键词：

Density functional theory; RPV steels; Duplex steels; Ferritic; Solute clustering; ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; ENTROPY; ALLOY; IRRADIATION; EVOLUTION; MICROSTRUCTURE; STABILITY; FISSION; DENSITY;

D O I：

10.1016/j.jnucmat.2018.03.050

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Solute clustering and G-phase precipitation cause hardening phenomena observed in some low alloy and stainless steels, respectively. Density functional theory was used to investigate the energetic driving force for the formation of these precipitates, capturing temperature effects through analysis of the system's configurational and magnetic entropies. It is shown that enrichment of Mn, Ni and Si is thermodynamically favourable compared to the dilute ferrite matrix of a typical A508 low alloy steel. We predict the ordered G-phase to form preferentially rather than a structure with B2-type ordering when the Fe content of the system falls below 10-18 at. %. The B2 -> G-phase transformation is predicted to occur spontaneously when vacancies are introduced into the B2 structure in the absence of Fe. Crown Copyright (C) 2018 Published by Elsevier B.V. All rights reserved.

引用

页码：1 / 6

页数：6

共 50 条

[1] ELECTRONIC-STRUCTURE OF IMPURITIES IN FERROMAGNETIC IRON .2. 3D AND 4D IMPURITIES [J].

AKAI, H ;

AKAI, M ;

KANAMORI, J .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1985, 54 (11) :4257-4264

[2]

ASTM International, 2017, STAND SPEC QUENCH TE

[3] The Magnetic Moments and Their Long-Range Ordering for Fe Atoms in a Wide Variety of Metallic Environments [J].

Ayuela, A. ;

March, N. H. .

INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, 2010, 110 (15) :2725-2733

[4] NEW COMPLEX PHASE IN A HIGH-TEMPERATURE ALLOY [J].

BEATTIE, HJ ;

VERSNYDER, FL .

NATURE, 1956, 178 (4526) :208-209

[5] The vibrational and configurational entropy of disordering in Cu3Au [J].

Benisek, Artur ;

Dachs, Edgar .

JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 632 :585-590

[6]

Burke M. G., 2002, INT S ENV DEGR MAT N

[7] Microstructural aspects of irradiation damage in A508 Gr 4N forging steel: Composition and flux effects [J].

Burke, MG ;

Stofanak, RJ ;

Hyde, M ;

English, CA ;

Server, WL .

EFFECTS OF RADIATION ON MATERIALS: 21ST INTERNATIONAL SYMPOSIUM, 2004, 1447 :194-207

[8] MAGNETIC MOMENT DISTRIBUTION IN SOME TRANSITION METAL ALLOYS [J].

COLLINS, MF ;

FORSYTH, JB .

PHILOSOPHICAL MAGAZINE, 1963, 8 (87) :401-&

[9] ELECTRONIC-STRUCTURE AND MAGNETIC-PROPERTIES OF DILUTE FE ALLOYS WITH TRANSITION-METAL IMPURITIES [J].

DRITTLER, B ;

STEFANOU, N ;

BLUGEL, S ;

ZELLER, R ;

DEDERICHS, PH .

PHYSICAL REVIEW B, 1989, 40 (12) :8203-8212

[10] Vibrational thermodynamics of materials [J].

Fultz, Brent .

PROGRESS IN MATERIALS SCIENCE, 2010, 55 (04) :247-352

← 1 2 3 4 5 →