Continuous Dynamic Recrystallization in Magnesium Alloy

Galiyev, Arthur; Kaibyshev, Rustam; Sakai, Taku

doi:10.4028/www.scientific.net/msf.419-422.509

Cited by 78 publications

(42 citation statements)

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“…Aiming to break this difficulty, any effect of the change of the loading direction on further grain refinement has been studied systematically by using the same Mg alloy AZ31. It has been also known in Mg alloys that dynamic grain sizes evolved in high strain decrease with decreasing deformation temperature (Galiyev et al 2001, Sitdikov & Kaibyshev 2001. Then if Mg alloy is repeatedly MDFed with decreasing temperature, grain refinement is expected to take place more rapidly and effectively.…”

Section: Effect Of Mdf On Grain Refinementmentioning

confidence: 99%

Mechanical Properties of Fine-Grained Magnesium Alloys Processed by Severe Plastic Forging

Sakai¹,

Miura²

2011

Magnesium Alloys - Design, Processing and Properties

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Section: Effect Of Mdf On Grain Refinementmentioning

confidence: 99%

Mechanical Properties of Fine-Grained Magnesium Alloys Processed by Severe Plastic Forging

Sakai¹,

Miura²

2011

Magnesium Alloys - Design, Processing and Properties

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“…Continuous recrystallization, which also has been termed ''rotation recrystallization,'' ''in-situ recrystallization,'' or ''extended recovery,'' is accompanied by a continuous increase in the misorientation of low-angle grain boundaries (LAGB) without (or very limited) migration of HAGB. Such a mechanism is common in the superplastic deformation of some high SFE metals, such as Al alloys, [16,17] Mg alloys, [18] and ferritic steels. [19][20][21] The significant effects of initial grain size on the post-DRX recrystallization in different materials has also been reported in a number of studies.…”

Section: A Dehghan-manshadi and Pd Hodgsonmentioning

confidence: 99%

Dependency of Recrystallization Mechanism to the Initial Grain Size

Dehghan-Manshadi

Hodgson

2008

Metall Mater Trans A

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The effect of initial grain size on the recrystallization behavior of a type 304 austenitic stainless steel during and following hot deformation was investigated using hot torsion. The refinement of the initial grain size to 8 lm, compared with an initial grain size of 35 lm, had considerable effects on the dynamic recrystallization (DRX) and post-DRX phenomena. For both DRX and post-DRX, microstructural investigations using electron backscattered diffraction confirmed an interesting transition from conventional (discontinuous) to continuous DRX with a decrease in the initial grain size. Also, there were unexpected effects of initial grain size on DRX and post-DRX grain sizes.

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“…It also promotes a quick increase in the misorientation by the cross-slip of the screw hai dislocations across the subgrains and accumulation into the subgrain boundaries. 31) Some recent researches [32][33][34] reported activation of non-basal slips by minor RE addition in Mg. Therefore, it is presumed that the promotion of the activation of non-basal slips affects grain rotation process during DRX, resulting in the formation of the RE texture component in the extruded Mg-Zn-Ce alloys.…”

Section: Resultsmentioning

confidence: 99%

Microstructure, Texture and Mechanical Properties of Mg-Zn-Ce Alloy Extruded at Different Temperatures

et al. 2011

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The microstructure, texture and mechanical properties of Mg-1.5 mass%Zn-0.2 mass%Ce alloys extruded at different extrusion temperatures were investigated. A ''rare earth (RE)'' texture component, which laid at about 20 from h2 1 1 1 10i in an inverse pole figure, appeared in the as-extruded specimen, only when the extrusion temperature was set to 703 K. It is suggested that a high extrusion temperature of around 723 K is essential for the formation of RE texture component. Electron back-scatter diffraction (EBSD) measurements revealed that the RE texture component originated from dynamic recrystallized grains in the band microstructure around the unrecrystallized grains, in contrast to the results of previous studies, in which it originated from shear bands in the unrecrystallized grains. The specimen extruded at 703 K and subsequently annealed showed a lower yield stress and higher ductility than that extruded at 573 K and subsequently annealed, owing to the wider spread of texture originating from the RE texture component in the as-extruded specimen.

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Continuous Dynamic Recrystallization in Magnesium Alloy

Cited by 78 publications

References 0 publications

Mechanical Properties of Fine-Grained Magnesium Alloys Processed by Severe Plastic Forging

Mechanical Properties of Fine-Grained Magnesium Alloys Processed by Severe Plastic Forging

Dependency of Recrystallization Mechanism to the Initial Grain Size

Microstructure, Texture and Mechanical Properties of Mg-Zn-Ce Alloy Extruded at Different Temperatures

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