YOUNG'S MODULUS OF EUTECTIC ALLOY SYSTEMS WITH SPECIAL EMPHASIS ON THE SILVER-LEAD SYSTEM
STANFORD UNIV CA DEPT OF MATERIALS SCIENCE AND ENGINEERING
Pagination or Media Count:
The dynamic Youngs modulus - composition relation in eutectic alloy systems, without terminal solid solubility, follows either a linear relation or a less than linear relation. Essentially linear relations are obtained for systems where the moduli differences between the two phases are small or when the microstructure of the alloy exhibits a strong fibered texture such as is obtained in a cold drawn material. Eutectic systems containing a random distribution of phases with large moduli differences between the phases exhibit less than linear relations between modulus and composition. The theory of Hashin and Shtrikman is in qualitative agreement with experimental data obtained in the Ag-Pb system. Quantitatively, the actual modulus values of the composite are higher than the predicted values. This discrepancy may be due to the presence of internal stresses at the Ag-Pb interface which factor is not taken into consideration in the Hashin-Shtrikman theory.
- Metallurgy and Metallography