Paper Title:
Effect of Thermal Aging on the Transformation Temperatures and Specific Heat Characteristics of 9Cr-1Mo Ferritic Steel
  Abstract

The effect of thermal ageing on the heat capacity and transformation behaviour of behaviour of 9Cr-1Mo-0.1C (wt.%) ferritic / martensitic steel has been studied using differential scanning calorimetry (DSC) in the temperature range 473 to 1273 K. It is found that a-ferrite + carbide ® g-austenite phase transformation temperature is only mildly sensitive to microstructural details; but the enthalpy change associated with this phase transformation and especially, the change in specific heat around the transformation regime are found to be dependent on the starting microstructure generated by thermal ageing treatment. Prolonged ageing for about 500 to 5000 hours in the temperature range 823 to 923 K contributed to a decrease in heat capacity, as compared to the normalised and tempered sample. The martensite microstructure is found to possess the lowest room temperature CP among different microstructures.

  Info
Periodical
Edited by
G. B. Kale, M. Sundararaman, G. K. Dey and G. P. Tiwari
Pages
85-90
DOI
10.4028/www.scientific.net/DDF.279.85
Citation
B. Jeya Ganesh, S. Raju, E. Mohandas, M. Vijayalakshmi, "Effect of Thermal Aging on the Transformation Temperatures and Specific Heat Characteristics of 9Cr-1Mo Ferritic Steel", Defect and Diffusion Forum, Vol. 279, pp. 85-90, 2008
Online since
August 2008
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