Open AccessINTERNAL FRICTION OF Ag-Cd ALLOY IN THE BAINITIC TRANSFORMATION
Author(s) -
Jihua Zhang,
Chen Shuchuan,
Zhengyang Xu
Publication year - 1986
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.35.379
Subject(s) - materials science , torsion pendulum clock , alloy , isothermal process , internal friction , nucleation , volume fraction , thermodynamics , instability , bainite , torsion (gastropod) , lattice (music) , microstructure , composite material , mechanics , martensite , physics , medicine , quantum mechanics , acoustics , surgery
The isothermal internal friction of a Ag-42.3% Cd alloy has been measured by means of a low frequency inverted torsion pendulum apparatus between room temperature and 250℃. The relation between Q-1 and temperature with various heating and cooling rate were determined. Experimental results show that as the bainitic transformation occurs, the Q-1 of Ag-Cd alloy increases rapidly. It may be postulated that there are regions of instability of the parent lattice in the course of nucleation process for the bainitic transformation. The increment of Q-1s is a function of the product of internal friction of the fraction of the lattice localized soft region per volume and the nuclea-tion rate J* of the bainite.