Phase transformations in silver-zinc alloys by mechanical deformation


Tokay N. , ALPAUT O.

ZEITSCHRIFT FUR METALLKUNDE, cilt.88, ss.744-747, 1997 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 88 Konu: 9
  • Basım Tarihi: 1997
  • Dergi Adı: ZEITSCHRIFT FUR METALLKUNDE
  • Sayfa Sayıları: ss.744-747

Özet

The beta' phase obtained by quenching Ag-Zn alloys having composition around 50 at.% Zn were transformed to the zeta phase by mechanical deformation, Aging of the partially ordered zeta structure caused the reversion to the ordered body-centered cubic beta' structure. The rate of the reversion which has been measured for alloys having compositions from 48.0 to 50.9 at.% Zn was found to be dependent on both temperature and composition, The rate of the transformation increased exponentially with increasing temperature. It was observed that the reversion rate was the greatest for the AgZn compound and decreased for the other alloys for a definite temperature. The activation energy of the process was found to lie between 58.8 and 99.4 kJ mol(-1) for the alloys studied.