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Internal friction and Mössbauer study of C–Cr associates in MANET steel

Published online by Cambridge University Press:  31 January 2011

P. Gondi ,
R. Gupta ,
R. Montanari ,
G. Principi  and
M. E. Tata
P. Gondi
Affiliation:
Dip. Ingegneria Meccanica, Università di Roma “Tor Vergata”, Via della Ricerca Scientifica, 00133 Roma, Italy
R. Gupta
Affiliation:
Dip. Ingegneria Meccanica, Università di Padova, Via Marzolo 9, 35131 Padova, Italy
R. Montanari
Affiliation:
Dip. Ingegneria Meccanica, Università di Roma “Tor Vergata”, Via della Ricerca Scientifica, 00133 Roma, Italy
G. Principi
Affiliation:
Dip. Ingegneria Meccanica, Università di Padova, Via Marzolo 9, 35131 Padova, Italy
M. E. Tata
Affiliation:
Dip. Ingegneria Meccanica, Università di Roma, “Tor Vergata”, Via della Ricerca Scientifica, 00133 Roma, Italy
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Abstract

Internal friction and Mössbauer techniques have been used to investigate the structure of C–Cr associates and the arrangement of Fe atoms near them in the Cr martensitic steel MANET subjected to different thermal treatments. After slow rate cooling from the austenitic field, the Mössbauer spectra exhibit, besides the complex magnetic pattern of martensite, a low intensity singlet attributed to the presence of a Cr-rich bcc phase. In correspondence, the internal friction curves, show, among others, a Snoek-type peak due to anelastic processes involving C–Cr associates with 6 Cr atoms. To explain the experimental results, a simple structural model is suggested.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 2 , February 1997 , pp. 296 - 299
Copyright
Copyright © Materials Research Society 1997

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