Microstructural Evolution in ZK60 Magnesium Alloy during Severe Plastic Deformation

Galiyev, Arthur; Kaibyshev, Rustam

doi:10.2320/matertrans.42.1190

Cited by 20 publications

(15 citation statements)

References 14 publications

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“…Also, it appears that fine recrystallized grains were formed at ε = 11%. It is reported that dynamic recovery [11,25] and recrystallization [21,24,[26][27][28] occur at room temperature in Mg and its alloys. It is recognized that the dynamic recovery is related to the {1 01 1} compression twins because dislocations are absorbed into the twin boundaries [11].…”

Section: Twin Area Ratio Of the Compressive-deformed And Tensile-defomentioning

confidence: 99%

Twinning behavior and deformation mechanisms of extruded AZ31 Mg alloy

Chino

Kimura

Mabuchi

2008

Materials Science and Engineering: A

205

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Section: Twin Area Ratio Of the Compressive-deformed And Tensile-defomentioning

confidence: 99%

Twinning behavior and deformation mechanisms of extruded AZ31 Mg alloy

Chino

Kimura

Mabuchi

2008

Materials Science and Engineering: A

205

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“…Many papers have reported the formation of ultrafine grained structures in pure magnesium [3][4][5][6] and AZ31 [7][8][9][10][11] , AZ61 12 , AZ80 13 , AZ91 [14][15][16] , ZK60 [17][18][19] , Mg-Zn-Y 20,21 , Mg-Gd-Y-Zr 22,23 , Mg-Zn-Ca [24][25][26][27] and Mg-Dy-Al-Zn-Zr 28 alloys. The processed alloys exhibit improved strength but also some papers report superplastic behaviour 16,19,22,29,30 , improved hydrogen storage properties 3,[31][32][33][34][35] and improved corrosion resistance 24,27,36 .…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Hardness Evolution in Magnesium Processed by HPT

et al. 2017

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High pressure torsion provides an opportunity to process materials with low formability such as magnesium at room temperature. The present work shows the microstructure evolution in commercially pure magnesium processed using a pressure of 6.0 GPa up to 10 turns of rotation. The microstructure evolution is evaluated using electron microscopy and the hardness is determined using dynamic hardness testing. The results show that the grain refinement mechanism in this material differs from materials with b.c.c. and f.c.c. structures. The mechanism of grain refinement observed at high temperatures also applies at room temperature. The hardness distribution is heterogeneous along the longitudinal section of the discs and is not affected by the amount of deformation imposed to the material.

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“…It is noted that dynamic recrystallization occurred at room temperature in the {1 0 1 1} twin during alternate compression in two orthogonal directions. Room temperature recrystallization or recovery in Mg has been previously observed [44][45][46][47][48]. Koike et al showed that dynamic recovery occurred in twins in AZ31 Mg and elongated to 16% at room temperature [48].…”

Section: Philosophical Magazine 3969mentioning

confidence: 90%

“…Twin boundaries often affect recrystallization in Mg [49][50][51], may transform to high angle boundaries. Galiyev and Kaibyshev [45] showed that a full grained structure was obtained in ZK60 Mg alloy under a large strain at room temperature. This indicates that the large strain induces room temperature recrystallization.…”

Section: Philosophical Magazine 3969mentioning

confidence: 98%

Twinning behaviour of AZ31 Mg alloy alternately compressed in two orthogonal directions

Kwon

Nakano

Mabuchi

et al. 2014

Philosophical Magazine

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Extruded AZ31 Mg alloy was repeatedly alternately compressed in the extrusion direction (ED) and transverse direction (TD) at room temperature. The microstructures of compressed specimens were investigated by various methods, e.g. electron backscattered diffraction, scanning electron microscopy and transmission electron microscopy. The specimen was not fractured even after 10 times alternate compressions, where the strain by each compression was about 12%, although twinning increased with increasing compression number. {1 0 1 1}-{1 0 1 2} double twins were generated during ED compression, but barely during TD compression. The double twins differed to those generated during deformation in one direction. {1 0 1 2} twinning outside the {1 0 1 1} twin induced {1 0 1 2} twinning inside the {1 0 1 1} twin, and consequently, {1 0 1 1}-{1 0 1 2} double twins were formed during alternate compression. Hence, the geometric compatibility between {1 0 1 2} twins inside and outside the {1 0 1 1} twin was the determinant for the variant selection. Besides, dynamic recrystallization occurred at room temperature in the {1 0 1 1} twin, which resulted in a high ductility of the alternately compressed specimens.

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Microstructural Evolution in ZK60 Magnesium Alloy during Severe Plastic Deformation

Cited by 20 publications

References 14 publications

Twinning behavior and deformation mechanisms of extruded AZ31 Mg alloy

Twinning behavior and deformation mechanisms of extruded AZ31 Mg alloy

Microstructure and Hardness Evolution in Magnesium Processed by HPT

Twinning behaviour of AZ31 Mg alloy alternately compressed in two orthogonal directions

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