Grain growth kinetics and annealed texture characteristics of Mg-Sc binary alloys

Silva, Catherine; Kula, A.; Mishra, Raja K.; Niewczas, M.

doi:10.1016/j.jallcom.2016.06.123

Cited by 30 publications

(8 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More importantly, there are increased numbers of twin variants being activated in the alloys than the pure Mg sample. The effect of solutes on twinning nucleation has been reported in Mg alloyed with rare earth elements [12,13], and reduced twin thickness has been observed in Mg alloys with solute segregation to the twin boundaries [14], but the effect of solute addition on twin variant selection has not been studied. Moreover, many studies on the growth mechanisms of mature twins in pure Mg and Mg alloys have been conducted, yet twin embryo growth mechanisms are largely neglected both experimentally and theoretically, despite the fact that the growth of twin embryos at early stages should influence the final twin morphology.…”

mentioning

confidence: 99%

Embracing the Chaos: Alloying Adds Stochasticity to Twin Embryo Growth

Turlo

Beyerlein

et al. 2020

Phys. Rev. Lett.

View full text Add to dashboard Cite

High-throughput atomistic simulations reveal the unique effect of solute atoms on twin variant selection in Mg-Al alloys. Twin embryos first undergo a stochastic incubation stage when embryos choose which twin variant to adopt, and then a deterministic growth stage when embryos expand without changing the selected twin variant. An increase in Al composition promotes the stochastic incubation behavior on the atomic level due to nucleation and pinning of interfacial disconnections. At compositions above a critical value, disconnection pinning results in multiple twin variant selection.

show abstract

mentioning

confidence: 99%

Embracing the Chaos: Alloying Adds Stochasticity to Twin Embryo Growth

Turlo

Beyerlein

et al. 2020

Phys. Rev. Lett.

View full text Add to dashboard Cite

show abstract

“…To investigate the effects of β‐Si 3 N 4 seeds and nanophase on the growth kinetics of Si 3 N 4 ceramics, the classical Lifshitz‐Slyozov‐Wagner theory was applied, which is expressed as Equation () 45–47

\begin{equation}G_{\rm{t}}^{\rm{m}} - G_0^{\rm{m}} = Kt,\end{equation}

where G t is the grain size after sintering time t , and G 0 is the grain size of the initial power ( t = 0), K is a constant, and m is the grain growth index.…”

Section: Resultsmentioning

confidence: 99%

“…To investigate the effects of β-Si 3 N 4 seeds and nanophase on the growth kinetics of Si 3 N 4 ceramics, the classical Lifshitz-Slyozov-Wagner theory was applied, which is expressed as Equation ( 4). [45][46][47] 𝐺 m t − 𝐺 m 0 = 𝐾𝑡,…”

Section: Grain Growth Kineticsmentioning

confidence: 99%

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si ₃ N ₄ seeds and nanophase additives

Jiang

Zhuang

Wang

et al. 2022

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Si 3 N 4 ceramics with high thermal conductivity and outstanding mechanical properties were prepared by adding β-Si 3 N 4 seeds and nanophase α-Si 3 N 4 powders as modifiers. The introduction of β-Si 3 N 4 seeds enhanced the growth of β-Si 3 N 4 grains. Owing to the interlocked structure induced by the β-Si 3 N 4 grains, the fracture toughness of Si 3 N 4 ceramics reached a high value of 7.6 MPa⋅m 1/2 ; also, the large-sized grains increased the contact possibility of Si 3 N 4 grains, improving the thermal conductivity of Si 3 N 4 ceramics (64 W/(m⋅K)). Because of the introduction of nanophase α-Si 3 N 4 , the flexural strength, fracture toughness, and thermal conductivity of the Si 3 N 4 ceramics increased to 754 MPa, 7.2 MPa⋅m 1/2 , and 54 W/(m⋅K), respectively. According to the analysis of the growth kinetics of Si 3 N 4 grains, the rapid growth of Si 3 N 4 grains was ascribed to the reduction in the activation energy resulting from the introduction of β-Si 3 N 4 seeds and nanophase α-Si 3 N 4 .

show abstract

“…Among many magnesium alloys, Sc-containing alloys are of particular interest, since they have structural stability and improved hightemperature properties [2][3][4][5], which expands their functionality in many industries, including medicine, e.g., for the manufacturing of coronary stents. At the same time, it is relatively difficult to use them to create products due to the limited alloy plasticity caused by the low symmetry of the h.c.p.…”

Section: Introductionmentioning

confidence: 99%

Velocity and Absorption of Longitudinal Ultrasound in an Extruded Mg–5% Sc Alloy

Bulatov¹,

Klochko²,

Korniyets³

et al. 2022

Metallofiz. Noveishie Tekhnol.

View full text Add to dashboard Cite

The behaviour of the velocity and the change in the absorption of longitudinal ultrasound in the process of structural relaxation is investigated at a frequency of 50 MHz using ultrasonic spectroscopy in the temperature range 77-300 K in the Mg-5% Sc alloy deformed by equal-channel angular extrusion. Peaks of acoustic absorption with localization temperatures of ∼232 and 190 K are found. An estimate of the activation energy (∼0.5 and ∼0.16 eV) indicates that these relaxation processes are due to dislocation relaxation resonance. The influence of the kinetics of the processes of structural relaxation in the extruded alloy on the investigated acoustic characteristics is shown. As found, that the evolution of the temperature spectrum of acoustic absorption in the Mg-5% Sc alloy is caused by the return of the structure after severe plastic deformation.

show abstract

Grain growth kinetics and annealed texture characteristics of Mg-Sc binary alloys

Cited by 30 publications

References 63 publications

Embracing the Chaos: Alloying Adds Stochasticity to Twin Embryo Growth

Embracing the Chaos: Alloying Adds Stochasticity to Twin Embryo Growth

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si ₃ N ₄ seeds and nanophase additives

Velocity and Absorption of Longitudinal Ultrasound in an Extruded Mg–5% Sc Alloy

Contact Info

Product

Resources

About

Grain growth kinetics and annealed texture characteristics of Mg-Sc binary alloys

Cited by 30 publications

References 63 publications

Embracing the Chaos: Alloying Adds Stochasticity to Twin Embryo Growth

Embracing the Chaos: Alloying Adds Stochasticity to Twin Embryo Growth

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si 3 N 4 seeds and nanophase additives

Velocity and Absorption of Longitudinal Ultrasound in an Extruded Mg–5% Sc Alloy

Contact Info

Product

Resources

About

Preparation, microstructure, and properties of GPS silicon nitride ceramics with β‐Si ₃ N ₄ seeds and nanophase additives