Influence of nanovoids on α-α′ phase separation in FeCrAl oxide dispersion strengthened alloy

SCRIPTA MATERIALIA

卷:110

Article

Capdevila, C.¹  Aranda, M. M.¹  Rementeria, R.¹  Dominguez-Reyes, R.²  Urones-Garrote, E.³  Miller, M. K.⁴ 

[1] Ctr Natl Invest Met CENIM CSIC, Mat Res Grp, Madrid 28040, Spain

[2] Univ Carlos III Madrid, Dept Fis, Leganes 28911, Spain

[3] Univ Complutense Madrid, CNME, E-28040 Madrid, Spain

[4] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

关键词: Phase separation;    Ferrous alloy;    Tomography;    Positron annihilation spectroscopy;    Spinodal decomposition;   

DOI  :  10.1016/j.scriptamat.2015.07.044

来源: Elsevier

【 摘 要 】

The presence of nanovoids in the vicinity of oxide particles in FeCrAl oxide dispersion strengthened (ODS) alloy has been identified. These nanovoids are inherent to the manufacturing route and remain quite resistant during heat treatments. Positron annihilation spectroscopy (PAS) experiments demonstrate that these nanovoids trap Cr inside thereby reducing the Cr-content in the matrix. This might lead to a delay in the alpha-alpha' phase separation process as observed by atom probe tomography (APT). (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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