Recuperación del orden después del templado en una aleación de Cu-Zn-Al

F. LANZINI; M. L. CASTRO; R. ROMERO

REVISTA MATéRIA

Red Latinoamericana de Materiales

Lugar: Río de Janeiro; Año: 2004 vol. 9 p. 256 - 262

1517-7076

The evolution of the recovery of the L21 order is studied, after quenching from a temperature above the critical for this ordering to several temperatures in the 299K ≤ T≤ 341K range. It is found that the evolution of the disordering process with aging follows a complex behavior. The dynamics of elimination of defects by a thermally activated process assisted by the vacancies retained by quenching is analyzed. Undersome simplified hypotheses, it is possible to reproduce the essential characteristics of the process; however, the adjustment obtained is not quite satisfactory. The analysis of the characteristic relaxation times as afunction of the aging temperature of the reordering process, compared with that of elimination of vacancies, shows that the first is only a 4-5 factor faster than the second one.