Subsurface Depletion and Enrichment Processes During Oxidation of a High Chromium, Laves-Phase Strengthened Ferritic Steel

被引：21

作者：

Asensio, C. ^{[1
]}

Chyrkin, A. ^{[1
]}

Niewolak, L. ^{[1
]}

Konoval, V. ^{[2
]}

Hattendorf, H. ^{[3
]}

Kuhn, B. ^{[1
]}

Singheiser, L. ^{[1
]}

Quadakkers, W. J. ^{[1
]}

机构：

[1] Forschungszentrum Julich GmbH, Inst Energy & Climate Res IEK 2, D-52425 Julich, Germany

[2] NASU, Inst Problems Mat Sci, UA-03680 Kiev, Ukraine

[3] ThyssenKrupp VDM, D-58791 Werdohl, Germany

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2011年 / 14卷 / 08期

关键词：

diffusion; oxidation; phase equilibrium; precipitation hardening; steel; ALLOY; CREEP; TRANSFORMATIONS; SCALES;

D O I：

10.1149/1.3590258

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

070208 [无线电物理];

摘要：

During oxidation of a Laves-phase strengthened ferritic steel at 800 degrees C in Ar/H-2/H2O a precipitate-depleted zone occurs as a result of subscale chromium depletion. In parallel, an enrichment of Laves-phase is found in the immediate vicinity of the scale/alloy interface. Modeling the phase equilibria and diffusion processes for an Fe-Cr-Nb model alloy using Thermo-Calc and DICTRA revealed that this combined enrichment/depletion process can be explained by the influence of alloy chromium concentration on the Nb activity. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3590258] All rights reserved.

引用

页码：P17 / P20

页数：4

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