Isothermal and non-isothermal precipitation kinetics in Al–Mg–Si-(Ag) alloy

Djema, Oussama; Bouabdallah, M.; Badji, Riad; Saadi, Amr; Kherrouba, Nabil; Sahli, Amane

doi:10.1016/j.matchemphys.2019.122073

Cited by 21 publications

(3 citation statements)

References 38 publications

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“…The additivity rule divides the time infinitely short during the heating and cooling processes to derive an isothermal section, and the equation is expressed as follows. [ 29,30 ]

\frac{Δ t \cdot \sum_{j = 1}^{i} k_{j}}{{[\ln (\frac{1}{1 - F_{i}})]}^{\frac{1}{n}}}

…”

Section: Resultsmentioning

confidence: 99%

Effect of Cooling Rate on Phase Transformation Behavior during Isothermal Annealing of SCr420 Steel

Park

et al. 2022

steel research int.

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Herein, the effect of cooling rate on microstructure formation and phase transformation behaviors during isothermal annealing of the SCr420 steel is investigated. During isothermal annealing, tempering is performed after normalizing, and the effect of cooling conditions from normalizing to tempering is analyzed. As the cooling rate increases, the nonuniform microstructure with the band structure formed after hot forging tends to be homogenized. When the temperature reached during cooling is lowered, the phase transformation is rapidly completed during the cooling process, and the microstructure becomes more homogeneous. Phase transformation behavior during cooling from the normalizing temperature is analyzed through differential scanning calorimetry. Two exothermic reaction peaks are detected, and those peaks are related with the γ → γ + α → α + θ phase transformation. The higher the cooling rate, the lower the phase transformation starting temperature and the higher the phase transformation rate. In addition, from the thermal analysis data, the phase transformation kinetics and activation energy during cooling are analyzed by the Friedman method and the additivity rule. Through this analysis, the Avrami exponent and the activation energy for the phase transformation are derived.

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“…The additivity rule divides the time infinitely short during the heating and cooling processes to derive an isothermal section, and the equation is expressed as follows. [ 29,30 ]

\frac{Δ t \cdot \sum_{j = 1}^{i} k_{j}}{{[\ln (\frac{1}{1 - F_{i}})]}^{\frac{1}{n}}}

…”

Section: Resultsmentioning

confidence: 99%

Effect of Cooling Rate on Phase Transformation Behavior during Isothermal Annealing of SCr420 Steel

Park

et al. 2022

steel research int.

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“…Therefore, it is feasible to use microalloying to synchronously improve the strength and corrosion performance of 5xxx series aluminum alloys. The interaction of Mg, Si, and Ag promotes the formation of solute clusters and GP zones, which provide nucleation sites for nanoscale particles [19,20]. However, the evolution of its composition and the structure of precipitates in the Al-Mg-Si-Ag alloy has not been identified yet.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Evolution of Microstructure, Mechanical Properties, and Corrosion Resistance of Novel Al-Mg-Si-Ag Alloy

Liu,

Wu,

Wang

et al. 2023

Coatings

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In this paper, the evolution of the microstructure, mechanical properties, and intergranular corrosion (IGC) resistance of an Al-Mg-Si-Ag alloy is systematically investigated. For the as-cast alloy, the microstructure consists of the Mg2Si phase and Mg32(Al, Ag)49 phase. In the isothermal aging process, the novel alloy presents a significant age hardening effect. The ultimate tensile strength (UTS) and yield strength (YS) of the peak-aged alloy are 342 MPa and 231 MPa, respectively, which are 53 MPa and 84 MPa higher than that of the as-quenched alloy. The main strengthening phase at the peak-aged stage of the alloy is the MgAg phase, which has a body-centered cubic structure with a lattice constant of a = 0.33 nm. In addition, the IGC resistance of the peak-aged alloy is worse than that of other aged alloys. The corresponding microstructure of GBPs of the peak-aged alloy is more consecutive, and this is the main reason for the deterioration of IGC resistance of the alloy.

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“…En rangos de temperatura más elevados (260-485ºC, IV), la fase B" se transforma en una fase metaestable B' (Mg1,7Si) que a su vez evoluciona a la fase de equilibrio B (Mg2Si) dentro del intervalo de 485ºC a 520ºC (V). El rango de temperaturas para cada etapa se corresponde con la secuencia de precipitación de la aleación 6061 similar a la 6063 (Djema et al, 2020;Kongthep & Juijerm, 2014 Figura 4-6. Precipitados ZGP y B'' en la red atómica (Gialanella & Malandruccolo, 2020).…”

Section: Matriz De Aa6063unclassified

Caracterización y modelización de materiales compuestos de AA6063 con espumas cerámicas y metálicas

Garzón¹

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Metallic Syntactic Foams (MSF) are an advanced kind of foam that has attractive mechanical and thermal properties for those applications where density is a limiting parameter. The main sectors with potential application are Defense, Naval, Nuclear, Transportation and Aerospace.These materials exhibit the advantageous properties of conventional metallic foams (MFs) but unlike these, they are processed through manufacturing processes of composite materials (MMCs). Due to that, MSFs are also known as composite metallic foams (CMFs). They can be constituted of two or more phases: The continuous phase is known as matrix while the discontinuous or dispersed phase is known as reinforcement.The present work proposes a process for manufacturing MSFs based on liquid metallurgy routes. The MSFs are made of a matrix of aluminum alloy AA6063 (Al-Mg-Si) and two sets of porous reinforcements, made of clay and aluminum. This study characterizes samples of aluminum syntactic foams (ASFs) through the ISO-13314: 2011 standard. Subsequently, the behavior is modeled through a viscoelastic approach.

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Isothermal and non-isothermal precipitation kinetics in Al–Mg–Si-(Ag) alloy

Cited by 21 publications

References 38 publications

Effect of Cooling Rate on Phase Transformation Behavior during Isothermal Annealing of SCr420 Steel

Effect of Cooling Rate on Phase Transformation Behavior during Isothermal Annealing of SCr420 Steel

Investigation of Evolution of Microstructure, Mechanical Properties, and Corrosion Resistance of Novel Al-Mg-Si-Ag Alloy

Caracterización y modelización de materiales compuestos de AA6063 con espumas cerámicas y metálicas

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