Internal friction, dynamic modulus (Md), microhardness measurements and X-ray diffraction analyses have been used to study the characteristics of C-Cr associates in 11% Cr martensitic steel MANET. On the basis of a preferential bond between C and Cr atoms, we discuss a statistical model which may explain the formation and stability of C-Cr associates for T< Tc and their dissolution for T> Tc. The model is illustrated by snapshots obtained by Monte Carlo simulations. Q-1 results show that the temperature T¢, critical for associate stability, is about 1450 K. The characteristics of C-Cr associates in as-quenched material depend on cooling rate: with slower rates it was found that diffusive motions of solute atoms take place for T> 1270 K playing a fundamental role on martensitic transformation.
Gondi, P., Montanari, R. (1994). Q-1 spectra connected with C under solute atom interaction. JOURNAL OF ALLOYS AND COMPOUNDS, 211-212, 33.
Q-1 spectra connected with C under solute atom interaction
GONDI, PRIMO;MONTANARI, ROBERTO
1994-01-01
Abstract
Internal friction, dynamic modulus (Md), microhardness measurements and X-ray diffraction analyses have been used to study the characteristics of C-Cr associates in 11% Cr martensitic steel MANET. On the basis of a preferential bond between C and Cr atoms, we discuss a statistical model which may explain the formation and stability of C-Cr associates for T< Tc and their dissolution for T> Tc. The model is illustrated by snapshots obtained by Monte Carlo simulations. Q-1 results show that the temperature T¢, critical for associate stability, is about 1450 K. The characteristics of C-Cr associates in as-quenched material depend on cooling rate: with slower rates it was found that diffusive motions of solute atoms take place for T> 1270 K playing a fundamental role on martensitic transformation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
