Formation Energy in Al-Mg Alloy by Positron Annihilation Lifetime Technique (PALT)

Authors

MAMDUH ABEDL-RAHMAN
EMAD A. BADAWI
ESSMAT MAHMOUD HASSAN
GAMAL YAHYA

DOI

-

Abstract

The propose of the present work is to study the interaction of positrons with quenched-in defects and clustered atoms to estimate formation enthalpy in series 50xx of commercial Al-Mg alloys, namely, 5049, 5051,5052 and 5083 at various concentrations: 1.9, 2.09, 2.46 and 4.44 wt % of Mg, respectively. Typically additional impurities were mainly Si, Fe, Cu, Cr and Ti. The monvacancy formation energy of Al-Mg alloys was measured from a trapping model analysis of the T-dependence of the positron lifetime.

Keywords

Lifetime, formation enthalpy, point defects in Al-Mg alloys.

First Page

381

Last Page

390

Recommended Citation

ABEDL-RAHMAN, MAMDUH; BADAWI, EMAD A.; HASSAN, ESSMAT MAHMOUD; and YAHYA, GAMAL (2002) "Formation Energy in Al-Mg Alloy by Positron Annihilation Lifetime Technique (PALT)," Turkish Journal of Physics: Vol. 26: No. 5, Article 8. Available at: https://journals.tubitak.gov.tr/physics/vol26/iss5/8