Phase-decomposition-related short-range ordering in an Fe-Cr alloy

被引：30

作者：

Dubiel, S. M. ^{[1
]}

Zukrowski, J. ^{[1
]}

机构：

[1] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, PL-30059 Krakow, Poland

来源：

ACTA MATERIALIA | 2013年 / 61卷 / 16期

关键词：

Binary alloys; Phase separation; Short-range order; Kinetics; SPINODAL DECOMPOSITION; COMPUTER-MODELS; ATOMIC-LEVEL; FERRITIC/MARTENSITIC STEELS;

D O I：

10.1016/j.actamat.2013.07.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A redistribution of Cr atoms related to a phase decomposition (PD) caused by an isothermal annealing at 415 degrees C in a 15.15 at.% Cr Fe Cr alloy was studied in an ex situ way by the conversion electrons Mossbauer spectroscopy. Analysis of the spectra in terms of a two-shell model enabled the determination of probabilities of 17 different atomic configurations and average numbers of Cr atoms within the first (1NN) and the second (2NN) neighbor shells vs. annealing time, separately. The annealing-time evolution of these numbers, expressed in terms of the Cowley-Warren short-range order (SRO) parameters, was shown to follow the Johnson-Mehl-Avrami-Kolgomorov equation. The SRO parameter averaged over the 1NN-2NN shells was revealed to be linearly correlated with the average hyperfine field. Signatures in favor of the nucleation and growth mechanisms responsible for PD are also discussed. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：6207 / 6212

页数：6

共 33 条

[1]

BINDER K, 1991, PHASE TRANSFORMATION, P405

[2] Numerical prediction of thermodynamic properties of iron-chromium alloys using semi-empirical cohesive models: The state of the art [J].

Bonny, G. ;

Pasianot, R. C. ;

Malerba, L. ;

Caro, A. ;

Olsson, P. ;

Lavrentiev, M. Yu. .

JOURNAL OF NUCLEAR MATERIALS, 2009, 385 (02) :268-277

[3]

CAER GL, 1979, J PHYS E, V12, P1083

[4]

Chung HM, 1991, POWER PLANT SYSTEMS, V208, P121

[5] Nucleation and growth versus spinodal decomposition in Fe-Cr alloys: Mossbauer-effect modelling [J].

Cieslak, J ;

Dubiel, SM .

JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 269 (1-2) :208-218

[6] Atom probe studies of the Fe-Cr system and stainless steels aged at intermediate temperature: A review [J].

Danoix, F ;

Auger, P .

MATERIALS CHARACTERIZATION, 2000, 44 (1-2) :177-201

[7]

DENYS T, 1971, METALL TRANS, V2, P1423

[8] Fe-rich border and activation energy of phase decomposition in a Fe-Cr alloy [J].

Dubiel, S. M. ;

Zukrowski, J. .

MATERIALS CHEMISTRY AND PHYSICS, 2013, 141 (01) :18-21

[9] Vibrational Properties of α- and σ-Phase Fe-Cr Alloy [J].

Dubiel, S. M. ;

Cieslak, J. ;

Sturhahn, W. ;

Sternik, M. ;

Piekarz, P. ;

Stankov, S. ;

Parlinski, K. .

PHYSICAL REVIEW LETTERS, 2010, 104 (15)

[10] Debye temperature of disordered bcc-Fe-Cr alloys [J].

Dubiel, S. M. ;

Cieslak, J. ;

Costa, B. F. O. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2010, 22 (05)

← 1 2 3 4 →