Mohan, Murali and Singh, AK (1989) Calculation of transformed fraction using resistivity data: A comparison of various conductivity models. Technical Report. National Aeronautical Laboratory, Bangalore, India.
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Abstract
Various models ofeffective electrical conductivity of a two phase system have been used to calculate the kinetics data from the resistancetime (t) data recorded during the a=w transformation in titanium and fcc+bcc transformation in ytterbium. The transformed fraction, for titanium, as calculated from the different conductivity models lie within 14 percent at = 0.02, .7 percent at = 0.5 and 0.5 percent at = 0.95. The  t data for titanium satisfy Avraml equation = lexp( ,t/T)n in all the cases and the values of the constants, the time exponent n and the characteristic time T lie within 3.5 percent. However, for ytterbium the values differ by a factor 4 at = 0.01, a factor 1 .5 at = 0.5 and a factor 1.05 at = 0.9. The values for ytterbium.obtained from the Landauer model fit Avrami equation better than those obtained from other conductivity models. The values of n and T for ytterbium differ by factors 1.4 and 2.8 respectively. It is seen that the values obtained from different conductivity models differ appreciably as the magnitude of the resistance change at the transformation increases
Item Type:  Monograph (Technical Report) 

Uncontrolled Keywords:  Effective conductivity;Various models 
Subjects:  AERONAUTICS > Air Transportation and Safety 
Depositing User:  Poornima Narayana 
Date Deposited:  14 Jul 2006 
Last Modified:  24 May 2010 04:15 
URI:  http://nalir.nal.res.in/id/eprint/2032 
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