Mechanical anisotropy improvement in ultrafine-grained ZK61 magnesium alloy rods fabricated by cyclic extrusion and compression

Zhang, W.C.; Yang, Yu; Zhang, X.N.; Chen, Wenzhen; Wang, E.D.

doi:10.1016/j.msea.2014.02.031

Cited by 49 publications

(10 citation statements)

References 21 publications

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“…The microstructure indicates the nuclei of MEJ zone are not developed to DRXed grains. The thermal activity of MEJ zone was not high enough to stimulate the small grains continuously growing up, and the sheets are not prone to be DRXed during the extrusion process [23,24]. Figure 5 describes EBSD results of the microstructure and the misorientation distribution for AZ31 alloy sheet at the middle layer of the EJ zone.…”

Section: Methodsmentioning

confidence: 99%

Influence of Extrusion Joint on Microstructural Evolution and Properties of Mg Alloy Sheet

Yang

Pan

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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The mechanical behaviour of AZ31 magnesium alloy sheet with the extrusion joint (EJ) was evaluated. Extruded joint of AZ31 alloy sheets was obtained by the hot extrusion process. Tensile tests were carried out along the extrusion direction at room temperature, and both the non-uniform plastic deformation and the fracture behaviour were studied. It is found that the samples with EJ present significantly deteriorated mechanical properties compared with the EJfree counterpart. Inhomogeneous microstructure distribution around EJ zone brings in the uncoordinated deformation due to the high density of f10 12g twins which were readily activated during plastic deformation.

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Section: Methodsmentioning

confidence: 99%

Influence of Extrusion Joint on Microstructural Evolution and Properties of Mg Alloy Sheet

Yang

Pan

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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“…[12][13][14] Owing to the non-uniformly distributed stored energy, the Mg alloys often undergo partially dynamic recrystallisation, and thus, inhomogeneous microstructure of the Mg alloys is often observed under only once extrusion, which apparently deteriorates the elongation. 12,15 Fine and homogeneous microstructure can be easily obtained through some severe deformation methods, such as repeated plastic working, 16 double extrusion, 17 equal channel angular pressing, 18 cyclic extrusion and compression, 19 high pressure torsion process 20 and cyclic closed die forging. 21 Compared with other methods, double extrusion is simple to carry out due to no complex mould.…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical and corrosion properties of NZ20K alloy by double extrusion and aging processes for biomedical applications

Chen

Zhang

Dai

et al. 2016

Materials Technology

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In order to refine and homogenise microstructure and to improve mechanical properties of the magnesium alloys for biomedical application, the Mg-2.0Nd-0.1Zn-0.4Zr (wt-%, NZ20K) alloy with low amount of alloying elements was processed by double extrusion and aging processes (DEAP). Compared to the NZ20K alloy after once extrusion and aging processes (OEAP), the microstructure becomes finer and more homogeneous, and the elongation is raised up ∼121% by DEAP. Moreover, the yield strength and ultimate tensile strength are improved ∼27 and ∼16% respectively. Additionally, the corrosion rate of the NZ20K alloy by the DEAP is a little slower than that of the OEAP. It can be concluded that the mechanical properties, as well as the corrosion resistance of the NZ20K alloy, are able to be enhanced by the double extrusion and aging processes.

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“…Numerous techniques for SPD processing are now available. The major methods already established for the fabrication of UFG materials include equal-channel angular pressing (ECAP) [7][8], high-pressure torsion (HPT) [9][10], multi-directional forging [11], twist extrusion [12], cyclic-extrusion-compression [13], reciprocating extrusion [14], repetitive corrugation and straightening (RCS) [15], constrained groove pressing (CGP) [16], cylinder covered compression (CCC) [17], accumulative rollbonding (ARB) [18], friction stir processing (FSP) [19] and submerged friction stir processing (SFSP) [20], severe torsion straining (STS) [21], cyclic closed-die forging (CCDF) [22] and super short multi-pass rolling (SSMR) [23]. All of these procedures are capable of introducing large plastic straining and significant microstructure refinement in bulk crystalline solids.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine-Grained Materials Produced by Severe Plastic Deformation

Elmasry¹,

Abo_Elkhair²

2016

The International Conference on Applied Mechanics and Mechanica

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In recent years, ultrafine-grained materials have attracted increasing interests for their good combinations of high strength and ductility. To prepare these materials, Various SPD processing techniques for refining the structure have been developed. This work highlights the recent achievements and new trends in the production of bulk ultrafinegrained (UFG) materials using severe plastic deformation (SPD). Some of those methods permit grain refinement to a Nanometric level. These methods include, among others, high pressure torsion (HPT), equal channel angular pressing (ECAP) and hydrostatic extrusion (HE). In this work, special attention is given to the principles of the various SPD processing techniques as well as the applications of the ultra-fine grained (UFG) metals.

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Mechanical anisotropy improvement in ultrafine-grained ZK61 magnesium alloy rods fabricated by cyclic extrusion and compression

Cited by 49 publications

References 21 publications

Influence of Extrusion Joint on Microstructural Evolution and Properties of Mg Alloy Sheet

Influence of Extrusion Joint on Microstructural Evolution and Properties of Mg Alloy Sheet

Enhanced mechanical and corrosion properties of NZ20K alloy by double extrusion and aging processes for biomedical applications

Ultrafine-Grained Materials Produced by Severe Plastic Deformation

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