Two different types of deformation behaviors in ultrafine grained Mg alloys at high temperatures and development of the generalized constitutive equation for describing their deformation behavior

Kim, Woo Jin; Lee, T.J.

doi:10.1016/j.msea.2014.06.096

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…Figure 5 reveals the microstructure after deformation at 450°C and strains ranging from 5% to 35% for sampling directions of 0°, 5°, and 10°. In general, the dynamic recrystallization process is classified into continuous and discontinuous DRX [17]. Continuous recrystallization is considered a recovery process accompanied by a progressive increase in boundary misorientation and the conversion of low-angle boundaries into high-angle boundaries [18].…”

Section: Flow Stress Behaviormentioning

confidence: 99%

Hot Deformation Behavior and Microstructural Evolution of Twin-Roll-Casting Mg Alloy during High-Temperature Compression

Yang

Dai

Chai

et al. 2019

Advances in Materials Science and Engineering

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The deformation behavior and microstructural evolution of twin-roll-casting AZ31 Mg alloy sheets were investigated via hot compression tests at 0°, 5°, and 10° from the normal direction. Compression strains of 5%, 15%, 25%, and 35% were employed at high temperatures of 450°C and 500°C. The flow stress as well as the difference in the flow stress associated with different sampling directions decreased when the temperature was increased. Furthermore, the volume fraction of dynamically recrystallized grains increased with increasing deformation, whereas the average grain size decreased. The DRX grain size and the volume fraction of dynamically recrystallized grains increased with increasing deformation temperature. During ultrahigh temperature compression, the effect of sampling direction on the compression microstructure is relatively small.

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Section: Flow Stress Behaviormentioning

confidence: 99%

Hot Deformation Behavior and Microstructural Evolution of Twin-Roll-Casting Mg Alloy during High-Temperature Compression

Yang

Dai

Chai

et al. 2019

Advances in Materials Science and Engineering

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“…In the case of magnesium alloys, the role of Coble creep was also frequently mentioned due to the fact that grain boundary diffusion is particularly easy in these alloys [25,26]. This contribution can still be promoted for ultra-fine structures but the situation may vary depending for instance of the fraction of second phase particles [27]. For instance, it is not excluded that superplastic deformation could be pressure sensitive since movement of grains may require dilation for occurring.…”

Section: What Is the Contribution Of Grain Boundary Sliding?mentioning

confidence: 99%

Superplasticity of Metallic Alloys: Some Current Findings and Open Questions

Blandin

2016

MSF

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Superplasticity of metallic alloys has been widely investigated for many years but despite numerous studies, some important questions regarding superplastic behavior of metals can be considered as still open. Among others, one can mention the role of grain boundary sliding as contributing mechanism of deformation, the microstructural requirements for getting superplasticity in metallic alloys or the link between mechanisms of deformation and mechanisms of damage. Interesting information were recently obtained by the use of new experimental techniques. One can mention for instance the development of fine grids allowing more detailed studies of the respective contributions of intra-and inter-granular strains in superplastic alloys or fast X-ray micro tomography allowing in situ 3D damage studies. The aim of this paper is to give information about current findings related to superplastic deformation of metallic alloys and to suggest some perspectives for future.

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Effects of minor Nd and Er additions on the precipitation evolution and dynamic recrystallization behavior of Mg–6.0Zn–0.5Mn alloy

Wang

et al. 2021

Journal of Magnesium and Alloys

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Two different types of deformation behaviors in ultrafine grained Mg alloys at high temperatures and development of the generalized constitutive equation for describing their deformation behavior

Cited by 6 publications

References 24 publications

Hot Deformation Behavior and Microstructural Evolution of Twin-Roll-Casting Mg Alloy during High-Temperature Compression

Hot Deformation Behavior and Microstructural Evolution of Twin-Roll-Casting Mg Alloy during High-Temperature Compression

Superplasticity of Metallic Alloys: Some Current Findings and Open Questions

Effects of minor Nd and Er additions on the precipitation evolution and dynamic recrystallization behavior of Mg–6.0Zn–0.5Mn alloy

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