Deformation Behaviour of Compacts of Zn-22Al Prealloy Powder

Comparison of the Deformation Behaviour of Compacts of Zn-22Al Prealloy Powder and Mixed Powder

Abstract

Deformation behaviour of compacts of 78 zinc-22 aluminium powder is studied by the uniaxial tensile test. The compacts are made from both the prealloy powder, and the mixture of 78% zinc and 22% alumi-nium powder; the behavior of the compacts are thus compared. The results obtained are as follows:
1) Total elongation of the compact of prealloy powder reaches 440%; in the case of mixed-powder compact, however, it is less than 80%.
2) To obtain large elongation, the compact should be of granular structure and of no porosity.