Estimating the Activation Enthalpy for Defect Formation in 5754 Alloys by Using Nuclear, Electrical and Mechanical Methods

Abstract:

The Positron Annihilation Lifetime Technique (PALT) Is One of the Most Important Nuclear Non-Destructive Techniques. it Was Used to Study the Activation Enthalpy for Defect Formation in 5754 Alloy. Quenching Experiments Were Usually Performed on Thin Specimens to Ensure a Uniform Quenching Rate throughout the Specimen. from such Measurements, it Is Possible to Deduce the Vacancy Formation Enthalpy which, in Combination with the Results of Self-Diffusion Measurements, Gives a Value for the Migration Enthalpy of the Vacancy. these Are Very Important Quantities in the Study of the Annealing of Irradiation-Induced Defects. the Use of the Quenching Technique in the Positron Annihilation Study Has the Advantage that it Allows a Distinction to Be Made between Vacancies and Dislocations. Correlations between Nuclear, Electrical and Mechanical Methods Have Been Carried Out after Quenching.

• Periodical: Defect and Diffusion Forum (Volume 329)
• Pages: 29-33
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.329.29
• Online since: July 2012
• Authors: Alaa M. Ibrahim, E.M. Hassen, M. A. Abdel-Rahman, Emad A. Badawi
• Keywords: 5754 Alloy, Activation Energy, Hardness, PALT, Quenching, Resistivity

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