Enhanced thermal stability in nanostructured bainitic steel

SCRIPTA MATERIALIA

卷:69

Article

Hulme-Smith, C. N.¹  Lonardelli, I.²  Peet, M. J.¹  Dippel, A. C.³  Bhadeshia, H. K. D. H.¹ 

[1] Univ Cambridge, Cambridge CB2 1TN, England

[2] Univ Trento, Trento, Italy

[3] Deutsch Elektronen Synchrotron DESY, Hamburg, Germany

关键词: Nanostructured bainite;    Thermal stability;    Synchrotron radiation;    Silicon;    Cementite precipitation;   

DOI  :  10.1016/j.scriptamat.2013.03.029

来源: Elsevier

【 摘 要 】

We report an attempt at increasing the thermal stability of nanocrystalline bainite to tempering heat treatments by enhancing the silicon concentration of the alloy. Validation experiments have been conducted using synchrotron X-irradiation during tempering heat treatment. It is found that the change in alloying successfully stabilizes the austenite at elevated temperatures by retarding cementite formation to temperatures as high as 500 degrees C. Other changes reflected in the lattice parameters of the major phases have revealed further information about the mechanisms involved. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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