Recrystallization in an Mg-Nd alloy processed by high-pressure torsion: a calorimetric analysis
Yousf Islem Bourezg, Hiba Azzeddine, Khadidja Abib, Yi Huang, Djamel Bradai, Terence G. Langdon
Abstract
Differential scanning calorimetry (DSC) was used to evaluate the recrystallization temperature and activation energy for an Mg-1.43Nd (wt.%) alloy after severe plastic deformation by high-pressure torsion (HPT) at room temperature up to 10 turns. The recrystallization kinetics were determined from DSC analysis. The results show that the recrystallization temperature increases with increasing heating rate and decreases with increasing numbers of HPT turns. Severe plastic deformation by HPT significantly reduces the recrystallization temperature. The estimated activation energy for recrystallization was in the range of ∼ 84−89 kJ mol−1.
Topics & Concepts
Recrystallization (geology)Materials scienceDifferential scanning calorimetryDynamic recrystallizationActivation energyAlloySevere plastic deformationHot workingAtmospheric temperature rangeTorsion (gastropod)KineticsMetallurgyThermodynamicsPhysical chemistryChemistryPaleontologyMedicineQuantum mechanicsBiologyPhysicsSurgeryMagnesium Alloys: Properties and ApplicationsAluminum Alloys Composites PropertiesMetal and Thin Film Mechanics