Microstructure and mechanical properties of ultrafine grain ZK60 alloy processed by equal channel angular pressing

He, Yunbin; Pan, Qing‐Jiang; Qin, Yinjiang; Liu, Xiaoyan; Li, Wenbin

doi:10.1007/s10853-009-4143-y

Cited by 30 publications

(9 citation statements)

References 35 publications

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“…Similar results of bi-modal grain size distributions were also reported at the disk center for the ZK60A alloy after HPT for 5 turns under P = 6.0 GPa [26]. It should be noted that the formation of a bi-modal microstructure is often observed in Mg alloys after ECAP [27][28][29][30][31] and several studies suggested this unique microstructure may be responsible for the superplastic behavior [27,28]. A recent model for grain refinement in h.c.p.…”

Section: Microstructural Evolutionsupporting

confidence: 77%

Evolution in hardness and texture of a ZK60A magnesium alloy processed by high-pressure torsion

Han-Joo

Lee

Jung

et al. 2015

Materials Science and Engineering: A

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Section: Microstructural Evolutionsupporting

confidence: 77%

Evolution in hardness and texture of a ZK60A magnesium alloy processed by high-pressure torsion

Han-Joo

Lee

Jung

et al. 2015

Materials Science and Engineering: A

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“…The mechanism of grain refinement based on local shearing, formation of low angle dislocation configurations followed by their transformation to HAGBs by dynamic recovery and recrystallization, see for example, was further developed to account for the heterogeneous bi‐modal grain size distribution on the early stages of the microstructure evolution during SPD at elevated temperatures …”

Section: Grain Boundary Engineering and Effect Of The Grain Boundary mentioning

confidence: 99%

“…With increasing imposed strain and decreasing temperature, HAGBs form in smaller and smaller grains. However, remarkable grain refinement achievable by SPD does not necessarily lead to a significant increase in the low‐temperature plasticity of magnesium alloys …”

Section: Grain Boundary Engineering and Effect Of The Grain Boundary mentioning

confidence: 99%

Tailoring Microstructure and Properties of Fine Grained Magnesium Alloys by Severe Plastic Deformation

2017

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Modern wrought magnesium alloys have poor formability at room temperature, which impedes the wider uptake of these alloys by the industry. Over the last decades, research activities in the area of magnesium alloy development have grown enormously and have produced a pallet of exciting findings, which the authors summarize in this concise review focused on the effect of the microstructure, primarily of grain size, on room temperature ductility of wrought Mg-based alloys. Well-established paths and modern strategies to control over the grain size distribution are discussed. It is demonstrated that the use of severe plastic deformation techniques for ultimate grain refinement in magnesium alloys opens new windows for improving their mechanical properties profile by managing both strength and ductility in a wide range. However, it is shown that grain size alone cannot be regarded as a key parameter controlling the mechanical behavior of Mg alloys. The effect of texture is of paramount importance for the overall mechanical response of Mg alloys and this may supersede the influence of grain size.

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“…The microstructure [ 13 , 14 ], mechanical properties [ 15 , 16 , 17 ], and biological applications [ 18 , 19 ] of ZK60 alloys have been studied widely in recent decades. It has been verified that microstructure evolution is essential for the mechanical properties of ZK60 alloys, grain refinement, and stable precipitates, having vital effects on improving the mechanical properties [ 20 , 21 , 22 , 23 ]. Nevertheless, the weak corrosion resistance of ZK60 alloys limits their further applications.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Corrosion of Cast Magnesium Alloy ZK60 in NaCl Solution

Peng

et al. 2020

Materials

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In this work, the effects of the microstructure and phase constitution of cast magnesium alloy ZK60 (Mg-5.8Zn-0.57Zr, element concentration in wt.%) on the corrosion behavior in aqueous NaCl (0.1 mol dm−3) were investigated by weight-loss measurements, hydrogen evolution tests, and electrochemical techniques. The alloy was found to be composed of α-Mg matrix, with large second-phase particles of MgZn2 deposited along grain boundaries and a Zr-rich region in the central area of the grains. The large second-phase particles and the Zr-rich regions were more stable than the Mg matrix, resulting in a strong micro-galvanic effect. A filiform corrosion was found. It originated from the second-phase particles in the grain boundary regions in the early corrosion period. The filaments gradually occupied most areas of the alloy surface, and the general corrosion rate decreased significantly. Corrosion pits were developed under filaments. The pit growth rate decreased over time; however, it was about eight times larger than the general corrosion rate. A schematic model is presented to illustrate the corrosion mechanism.

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Microstructure and mechanical properties of ultrafine grain ZK60 alloy processed by equal channel angular pressing

Cited by 30 publications

References 35 publications

Evolution in hardness and texture of a ZK60A magnesium alloy processed by high-pressure torsion

Evolution in hardness and texture of a ZK60A magnesium alloy processed by high-pressure torsion

Tailoring Microstructure and Properties of Fine Grained Magnesium Alloys by Severe Plastic Deformation

Microstructure and Corrosion of Cast Magnesium Alloy ZK60 in NaCl Solution

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