Volume 11, Issue 4 (December 2014)                   IJMSE 2014, 11(4): 20-27 | Back to browse issues page

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Fattah-alhosseini A, Asadi Asadabad M. PHASE STABILITY AND SEMICONDUCTING BEHAVIOUR OF LOW ACTIVATION AUSTENITIC MN-CR STEELS. IJMSE 2014; 11 (4) :20-27
URL: http://ijmse.iust.ac.ir/article-1-717-en.html
PHASE STABILITY AND SEMICONDUCTING BEHAVIOUR OF LOW ACTIVATION AUSTENITIC MN-CR STEELS
A Fattah-alhosseini , M Asadi Asadabad
Abstract:   (18420 Views)
Four compositions of austenitic Mn-Cr steels have been developed successfully for in-vessel component materials in power plant industry. The phase stability of these Mn-Cr steels was studied by and X-ray diffraction (XRD) patterns. XRD patterns have shown that the matrix of these Mn-Cr steels is a single γ-phase structure. The potentiodynamic polarisation curves suggested that these fabricated Mn-Cr steels showed passive behaviour in 0.1M H2SO 4solution. Therefore, semiconducting behaviour of passive film formed on these fabricated Mn-Cr steels in 0.1M H2SO 4 solution was evaluated by Mott–Schottky analysis. This analysis revealed that passive films behave as n-type and p-type semiconductors. Based on the Mott–Schottky analysis, it was also shown that donor and acceptor densities are in the order of 1021 cm -3 and are comparable for other austenitic stainless steels in acidic environments
Keywords: Low activation, Mn-Cr steel, XRD, Mott–Schottky
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Type of Study: Research Paper |
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