On the LME susceptibility of Si enriched steels

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• 作者：J. Van den Bosch ; G. Coen ; P. Hosemann ; S.A. Maloy
• 刊名：Journal of Nuclear Materials
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：429
• 期：1-3
• 页码：105-112
• 全文大小：1572 K

文摘

The addition of silicon to steels has been found to strongly increase the material¡¯s resistance to corrosion in liquid lead-bismuth eutectic environment; however the mechanical properties of ferritic-martensitic elevated silicon steels are also strongly affected by the liquid metal environment.<p>This paper discusses the assessment of the mechanical properties of silicon enriched high Cr steels T91, T91-Si, EP823, S2439 and S2440 when in contact with LBE. The stability and strength of the material¡¯s oxide layer was examined by nano-indentation and the oxide layer of EP823 was found to be harder and stiffer than that of T91. Furthermore, the nano-indents caused cracking of the oxide layer at the matrix-oxide interface in EP823 while no cracks were observed due to nano-indentation in the T91 oxide layer. These findings are then related to the respective material¡¯s susceptibility to liquid metal embrittlement.