Heat treatment and kinetics of precipitation of β-Mg17Al12 phase in AZ91 alloy
| dc.contributor.author | M. Fatmi | |
| dc.contributor.author | A. Djemli | |
| dc.contributor.author | A. Ouali | |
| dc.contributor.author | T. Chihi | |
| dc.contributor.author | M.A. Ghebouli | |
| dc.contributor.author | H. Belhouchet | |
| dc.date.accessioned | 2021-02-23T09:20:41Z | |
| dc.date.available | 2021-02-23T09:20:41Z | |
| dc.date.issued | 2018 | |
| dc.description.abstract | This study investigated the effect of aging on the precipitation and kinetics of second phase Mg17Al12 in AZ91 magnesium alloy (Mg-9 wt% Al-1 wt% Zn), using X-ray diffraction, microhardness measurements and differential scanning calorimetric analysis (DSC). With the last instrument, the all samples were heated from room temperature to 400 °C, at heating rates of 10–30 °C/min. The results were supplemented by measuring the average of activation energies, using isothermal treatments by Johnson–Mehl–Avrami (JMA) methods and by non-isothermal treatments using Ozawa, Boswell, Kissinger, Mahadevan, Augis and Bennett methods, were around 67.18 and 62.02 kJ/mol. The frequency factor k0 calculated by the isothermal treatment is equal to 1.24 109 s−1. In non-isothermal treatment, the numerical factor m and the Avrami parameter n is estimated to be approximately equal to 3 and 2.79 respectively. This value corresponding that the bulk nucleation with a constant number of nuclei was dominant in three-dimensional (polyhedron) controlled by interface reaction. | en_US |
| dc.identifier.uri | http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/23900 | |
| dc.publisher | Université de M'sila | en_US |
| dc.subject | AZ91 DSC Mg17Al12 Precipitation Activation energy | en_US |
| dc.title | Heat treatment and kinetics of precipitation of β-Mg17Al12 phase in AZ91 alloy | en_US |
| dc.type | Article | en_US |