Work hardening characteristics of gamma-ray irradiated Al-5356 alloy

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 607; pp. 132 - 137
• Main Authors: Saad, G., Fayek, S.A., Fawzy, A., Soliman, H.N., Nassr, E.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 23-06-2014; Elsevier
• Subjects: Aluminum base alloys; Analysing. Testing. Standards; Applied sciences; Coefficients; Constants; Deformation; Elasticity. Plasticity; Exact sciences and technology; Fractures; Instruments for strain, force and torque; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Irradiation; Irradiation-induced defects; Materials science; Mechanical instruments, equipment and techniques; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Physics; Strengthening parameters; Stress analysis; Stress-strain relationships; Stress–strain; Structural materials; Stress–strain; Irradiation-induced defects; Strengthening parameters; Strengthening; Deformation; Work hardening; Temperature effect; Elasticity; Fracture; Deformation measurement; Hardening; Grain boundary diffusion; Radiation effect; Arrhenius equation; Elastic properties; Rate constant; Dose; Activation energy; Stress measurement; Strain rate; Temperature dependence; Irradiation defect; Rupture; Mechanical properties; Thread; Gamma radiation; Stress-strain; Yield strength; Yield stress
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2014.03.137

Effects of γ-irradiation and deformation temperatures on the hardening behavior of Al-5356 alloy have been investigated by means of stress–strain measurements. Wire samples irradiated with different doses (ranging from 500 to 2000kGy) were strained at different deformation temperatures Tw (ranging from 303 to 523K) and a constant strain rate of 1.5×10−3s−1. The effect of γ-irradiation on the work-hardening parameters (WHP): yield stress σy, fracture stress σf, total strain εT and work-hardening coefficient χp of the given alloy was studied at the applied deformation temperature range. The obtained results showed that γ-irradiation exhibited an increase in the WHP of the given alloy while the increase in its deformation temperature showed a reverse effect. The mean activation energy of the deformation process was calculated using an Arrhenius-type relation, and was found to be ~80kJ/mole, which is close to that of grain boundary diffusion in aluminum alloys.