A Study of Internal Friction, Electric Resistance and Shape Change in Cu-Zn and Cu-Zn-Al Alloys During Phase Transformation Use Simultaneous Measurement Method

  • Yuan-Ti Huang
  • Tian-Fei Wang
  • Yin Mei
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series


The internal friction (Q-1), electric resistance (r), shape change (X), and temperature (T) in TiNi alloys during phase transformation have been measured simultaneously [1]. A. Ghilarducci and, M. Ahlers [2] have studied the internal friction in Cu-Zn and Cu-Zn-Al alloys and have shown that the Q-1 peaks are not due to the phase transformation but due to point defects. The electric resistance during thermoelastic martensite (TEM) phase transformation has been studied by K. Otsuka,, [3] and I. Cornelis and, C. M. Wayman showed that the TEM phase transformation temperature Ms, Mf, As and Af can be obtained from the electric resistance R vs. temperature T curves (R-T curve) [4]. The quantitative relation between the electric resistance change and the amount of martensite is not yet known. Now, the Q-1, R, X, frequency f and T during TEM transformation in Cu-Zn and Cu-Zn-Al alloys have been measured simultaneously as has been done in a TiNi alloy [1,5]. The amount of martensite at every temperature from Ms to Mf and As to Af was calculated by Delorme’s formula of internal friction [6], so that the change of R can be calculated.


Phase Transformation Phase Boundary Internal Friction Shape Change Nondestructive Evaluation 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Yuan-Ti Huang
    • 1
  • Tian-Fei Wang
    • 1
  • Yin Mei
    • 1
  1. 1.Department of PhysicsBeijing University of Science and TechnologyBeijingP.R.O. China

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