Modelling dynamic recrystallisation in magnesium alloy AZ31

Tam, Kenneth J.; Vaughan, M.W.; Shen, Luming; Knežević, Marko; Караман, И.; Proust, Gwénaëlle

doi:10.1016/j.ijplas.2021.102995

Cited by 36 publications

(6 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast, DDRX is a process with the serrated nucleation at HAGBs, which bulge and grow through the grain boundary migration [35]. As for TDRX mechanism, the deformation twins provide additional grain boundaries for either DDRX or CDRX to occur [36]. TDRX mechanism is also closely associated with the extrusion speed.…”

Section: Drx Mechanism Of the Extruded Zk60 Alloymentioning

confidence: 99%

Effect of extrusion temperature on the microstructure and mechanical properties of hot-extruded ZK60 magnesium alloy

Ma,

Chen

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

ZK60 magnesium alloy was prepared by the hot-pressed sintering combined with the hot-extruded technique. The microstructure and mechanical properties evolution of ZK60 alloy with a reduced extrusion temperature from 350 °C to 250 °C were investigated in detailed. The extruded alloy was mainly composed of fine α-Mg grains and MgZn2 phase. The grains size gradually decreased with a reduction in extrusion temperature, and the yield strength obviously increased accordingly. The alloy extruded at 250 °C exhibited the smallest average grain size of 2.5 μm and the best combination of strength and plasticity, with a yield strength of 279 MPa and fracture strain of 18.1% in compressive condition, and 263 MPa and 13.7% in tensile condition, as well as a tension-compression yield asymmetry of 0.94. Both the fine grains formed by the continuous and twin induced dynamic crystallization mechanism and the precipitation strengthening contributed to the strength improvement.

show abstract

Section: Drx Mechanism Of the Extruded Zk60 Alloymentioning

confidence: 99%

Effect of extrusion temperature on the microstructure and mechanical properties of hot-extruded ZK60 magnesium alloy

Ma,

Chen

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Then the formula of function relation between constant n and deformation activation energy is deduced, as follow Eqs. ( 6) and (7):…”

Section: Constitutive Analysis 441 Derivation Of Constitutive Equationmentioning

confidence: 99%

“…There is no doubt that dynamic recrystallization and static restoration, which occurs in magnesium alloys during thermal machining and subsequent heat treatment process, will result in great grain refinement. Studies showed that the additional slip system in hcp crystal structure was more likely to be activated at elevated temperature, which promoted the formability improvement of magnesium alloy [5,6,7]. However, the thermal deformation of magnesium alloys at high temperature was often accompanied by extremely severe oxidation overfiring and grain coarsening due to its low thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Dynamic recrystallization and deformation constitutive analysis of Mg–Zn-Nd-Zr alloys during hot rolling

Kong

Yang

Chen

et al. 2022

Heliyon

View full text Add to dashboard Cite

“…В статье [Tam et al, 2021] приведено описание модели, ориентированной на исследование поведения магниевого сплава AZ31 при одноосном растяжении образцов, вырезанных по нормали к плоскости прокатанной толстолистовой заготовки, под углом 45° к нормали и в поперечном по отношению к направлению прокатки, при температурах (25200 °С) до деформации 30 %. В качестве основы использована самосогласованная упруговязкопластическая модель, учитывающая влияние температуры, деформирование за счет движения краевых дислокаций по разным системам скольжения ГПУ-решетки и двойникование [Tam et al, 2020].…”

Section: многоуровневые модели включающие описание диффузионных механ...unclassified

Evolution of the grain structure of metals and alloys under intense plastic deformation: multilevel models

Трусов

Ostanina

Shveykin

2022

PNRPU Mechanics Bulletin

View full text Add to dashboard Cite

It is well known that the performance properties of products made of metals and alloys are determined mainly by the meso- and microstructure of the latter. The structure of materials is formed and undergoes significant changes in the processes of manufacturing parts and structures using thermomechanical processing methods. A very important parameter that determines the physical and mechanical characteristics of materials is the grain structure (size, shape, relative positions of grains and inclusions of various phases). In recent decades, in this regard, special attention has been paid to the processes of severe plastic deformation (SPD), which make it possible to obtain a submicro- and nanocrystalline grain structure, which provides a significant increase in the performance properties of products made of metals and alloys. The development of SPD technologies in modern conditions is unthinkable without mathematical modeling of the processes under consideration; the most important component in the development of such a "toolkit" are constitutive relations (or, more broadly, constitutive models). In connection with the foregoing, the latter should be able to describe the evolutionary structure at various scale levels. Until now, the practice of developers of materials processing technologies has been dominated by the use of macrophenomenological models based on classical continuum theories of plasticity, viscoplasticity, and creep. From the second half of the 20th century to the present, various improvements to the constitutive models of the above class have been proposed, in which additional parameters and kinetic equations are introduced for them, describing certain characteristics of the structure of materials. As a rule, such models make it possible to obtain an adequate picture of the changing structure, however, for specific materials and methods of thermomechanical treatment. At the same time, such models, unfortunately, do not have the necessary universality; when changing the material or processing method, they have to be significantly “customized” to specific conditions, up to a complete change in the relationships included in the model. A brief review of works devoted to the creation and application of models of this class is given in the previous article by the authors. The most promising and possessing a significant degree of universality, according to the authors, are currently multilevel constitutive models based on the introduction of internal variables and physical theories of plasticity (elastoviscoplasticity). A review of works that consider various aspects of the formulation, modification, numerical implementation and application of such models is proposed in this article. The main attention is paid to models focused on the description of changes in the structure of materials due to dislocation-disclination mechanisms; a brief note is given on models that take into account thermally activated diffusion mechanisms, due to which the processes of recovery and recrystallization are realized.

show abstract

Modelling dynamic recrystallisation in magnesium alloy AZ31

Cited by 36 publications

References 57 publications

Effect of extrusion temperature on the microstructure and mechanical properties of hot-extruded ZK60 magnesium alloy

Effect of extrusion temperature on the microstructure and mechanical properties of hot-extruded ZK60 magnesium alloy

Dynamic recrystallization and deformation constitutive analysis of Mg–Zn-Nd-Zr alloys during hot rolling

Evolution of the grain structure of metals and alloys under intense plastic deformation: multilevel models

Contact Info

Product

Resources

About