Dilatometric and DSC Study of the Kinetics of Discontinuous Precipitation of Ag2Al Intermetallic in Al – 10% Ag Alloy

Belhouchet, H.; Fatmi, M.; Sahnoune, F.; Heraiz, M.; Saheb, Nouari

doi:10.1007/s11041-018-0258-6

Cited by 3 publications

(2 citation statements)

References 29 publications

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“…This is even more doubtful if the DSC peaks are used for the determination of activation energies for the precipitation of specific phases, such as in many works, (e.g. [7][8][9][10][11][12][13][14][15]), for instance, by applying evaluation methods like the Kissinger method [16].…”

Section: Introductionmentioning

confidence: 99%

In situ high-energy X-ray diffraction of precipitation and dissolution reactions during heating of Al alloys

et al. 2021

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During heating of Al alloys, typically a sequence of precipitation and dissolution reactions occurs and the single (partly opposing) reactions superimpose. Differential scanning calorimetry (DSC) is one common technique to analyse the kinetic development of precipitation and dissolution in Al alloys, but the superposition of the exothermic precipitation and endothermic dissolution reactions complicates the DSC signal interpretation, as DSC measures the sum of any heat effect. Synchrotron high-energy X-ray diffraction (HEXRD) allows the kinetic development of phase transformations to be obtained and can support the separation of superimposed DSC signals. HEXRD results from this work offer a new approach to separate part of the superimposed reactions and their kinetic development for the equilibrium phases β-Mg2Si in EN AW-6082 and η-Mg(Zn,Cu,Al)2 in EN AW-7150. Comparing DSC and HEXRD results confirms serious overlap issues. Common DSC evaluation methods alone, using zero crossing between endothermic and exothermic heat flow or peak positions can be misleading regarding individual reaction start and finish temperatures as well as regarding reaction intensities, which can be unambiguously determined by in situ HEXRD.

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Section: Introductionmentioning

confidence: 99%

In situ high-energy X-ray diffraction of precipitation and dissolution reactions during heating of Al alloys

et al. 2021

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“…To acquire a better understanding of precipitation hardening kinetics, during non-isothermal annealing of two Al-Mg-Si alloys at different constant heating rates, the Kissinger-Akahira-Sunose (KAS) and Boswell have been used as basic isoconversional methods. These isoconversional methods are extensively used for analyzing non-isothermal decomposition, crystallization and degradation kinetics for large variety of materials and compounds [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Study of Precipitation Hardening in Two Al-Mg-Si Alloys with and without Copper and Excess Silicon Using Kissinger and Boswell Methods

Serradj

Farh

Belfarhi

2019

DDF

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The precipitation of two 6xxx (Al-Mg-Si) alloys with and without copper (Cu) and excess silicon (Si) has been investigated by using the differential scanning calorimetry (DSC), transmission electron microscopic (TEM) and X ray diffraction (XRD) analysis. The analysis of the DSC curves found that the excess Si accelerate the precipitation. The values of activation energies for each peak of DSC curves were determined by using Kissinger–Akahira–Sunose (KAS) and Boswell isoconversional methods. The alloy which has an excess Si and copper require larger activation energy for precipitation despite the acceleration of the precipitation by the excess Si. TEM observation result shows there is smaller size and higher density of precipitate in excess Si alloy than those of excess-free.

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DSC investigation of size-dependentγ′ dissolution and re-precipitation kinetics in Ni-based superalloy IN738LC

Mallikarjuna

Caley

Richards

2022

Canadian Metallurgical Quarterly

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Dilatometric and DSC Study of the Kinetics of Discontinuous Precipitation of Ag2Al Intermetallic in Al – 10% Ag Alloy

Cited by 3 publications

References 29 publications

In situ high-energy X-ray diffraction of precipitation and dissolution reactions during heating of Al alloys

In situ high-energy X-ray diffraction of precipitation and dissolution reactions during heating of Al alloys

Study of Precipitation Hardening in Two Al-Mg-Si Alloys with and without Copper and Excess Silicon Using Kissinger and Boswell Methods

DSC investigation of size-dependentγ′ dissolution and re-precipitation kinetics in Ni-based superalloy IN738LC

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