The kinetics of precipitation in Al-2.4 wt% Cu alloy by Kissinger, Ozawa, Bosswel and Matusita methods

• Published in: Physica. B, Condensed matter Vol. 406; no. 11; pp. 2277 - 2280
• Main Authors: Fatmi, M., Ghebouli, B., Ghebouli, M.A., Chihi, T., Abdul Hafiz, M.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.05.2011; Elsevier
• Subjects: Activation energy; Al–Cu alloys; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Index Avrami; Kinetics; Materials science; Physics; Solid solution, precipitation, and dispersion hardening; aging; Treatment of materials and its effects on microstructure and properties; Kinetics; Al–Cu alloys; Activation energy; Index Avrami; Differential scanning calorimetry; Precipitation; Aluminium base alloys; Copper alloys; Aging; Metallography; Al―Cu alloys; XRD; Heat treatments
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2011.03.053

The isothermal and non-isothermal ageing of an Al-2.4 wt% Cu alloy have been studied using X-ray diffraction analysis and differential scanning calorimetry (DSC) at different heating rates. Quantitative metallography methods have been applied to measure the corresponding transformed volume fractions at various temperatures and times of precipitation. The variation of the heating rate using DSC technique has allowed us to calculate two kinetics parameters of precipitation which are the Avrami exponent and the activation energy of the process using Kissinger, Ozawa and Bosswell methods. These parameters are similar to those found for the precipitation reaction of θ′ and θ (Al 2Cu) phases.