Effect of secondary phase particles on thermal stability of ultra-fine grained Mg-4Y-3RE alloy prepared by equal channel angular pressing

Minárik, Peter; Veselý, Jozef; Čı́žek, Jakub; Zemková, Mária; Vlasák, Tomáš; Krajňák, Tomáš; Kubásek, Jiří; Král, Róbert; Hofman, D.; Stráská, Jitka

doi:10.1016/j.matchar.2018.04.006

Cited by 25 publications

(7 citation statements)

References 30 publications

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“…If both mechanical deformation techniques and heat treatments are employed to the same alloy, the deformation techniques are used before the thermal treatments (Choudhuri et al, 2013). Continuous improvements in alloy processing technology have led to the development of several new processing techniques to further enhance the properties of magnesium alloys in general, and WE series in particular (Minárik et al, 2018). Many of these techniques are based on severe plastic deformation (SPD) of the material (Minárik et al, 2018).…”

Section: Processing Methodologiesmentioning

confidence: 99%

“…Continuous improvements in alloy processing technology have led to the development of several new processing techniques to further enhance the properties of magnesium alloys in general, and WE series in particular (Minárik et al, 2018). Many of these techniques are based on severe plastic deformation (SPD) of the material (Minárik et al, 2018). From these, the most commonly studied in combination with WE series magnesium alloys are Equal Channel Angular Pressing (ECAP) and High Pressure Torsion (HPT) (Torkian et al, 2018).…”

Section: Processing Methodologiesmentioning

confidence: 99%

“…Both ECAP and HPT are used to achieve an ultrafine grain microstructure in the processed material (Minárik et al, 2018). It has been extensively demonstrated that using ECAP (Martynenko et al, 2018;Minárik et al, 2018;Torkian et al, 2018) or HPT (Lukyanova et al, 2016;Lukyanova et al, 2017) for WE43 processing can lead to improvements in hardness and overall mechanical properties of the alloy due to significant grain refinement.…”

Section: Processing Methodologiesmentioning

confidence: 99%

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Rare Earth Based Magnesium Alloys—A Review on WE Series

2022

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Magnesium and magnesium alloys have attracted growing attention over the last decades as lightweight materials for a wide range of applications. In particular, WE series magnesium alloys have experienced growing interest over the last years due to their favourable mechanical properties at room and elevated temperatures. In addition, it has been reported that these rare earth-containing alloys possess superior corrosion resistance compared to other commonly used magnesium alloys, such as AZ series. This review aims at providing a concise overview of the research efforts made during recent years regarding the properties of WE series magnesium alloys (e.g., mechanical properties, corrosion behaviour), how these properties can be enhanced by controlling the microstructure of these materials, and the role of specific alloying elements that are used for the WE series. The widespread use of these materials has been limited, mainly due to their susceptibility to corrosion. Thus, in the present review, strong emphasis has been given to recent work studying the corrosion behaviour of the WE series alloys, and to protective strategies that can be employed to mitigate their degradation.

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Section: Processing Methodologiesmentioning

confidence: 99%

Section: Processing Methodologiesmentioning

confidence: 99%

Section: Processing Methodologiesmentioning

confidence: 99%

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Rare Earth Based Magnesium Alloys—A Review on WE Series

2022

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“…Even so, a slightly coarser grain structure was observed in the W3 alloy after the processing (~730 nm). In the WE43 alloy, rare earth elements formed small precipitates that increased the effectivity of the grain refinement through dynamic recrystallization and suppressed grain growth [ 39 ]. Consequently, small equiaxed grains formed without significant residual strain.…”

Section: Discussionmentioning

confidence: 99%

Concurrence of High Corrosion Resistance and Strength with Excellent Ductility in Ultrafine-Grained Mg-3Y Alloy

et al. 2022

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In the field of magnesium-based degradable implantable devices, the Mg-Y-RE-Zr alloying system (WE-type) has gained popularity due to its satisfying degradation rate together with mechanical strength. However, utilization of RE and Zr in the WE-type alloys was originally driven to improve Mg-based alloys for high-temperature applications in the industry, while for medical purposes, there is a question of whether the amount of alloying elements may be further optimized. For this reason, our paper presents the Mg-3Y (W3) magnesium alloy as an alternative to the WE43 alloy. This study shows that the omission of RE and Zr elements did not compromise the corrosion resistance and the degradation rate of the W3 alloy when compared with the WE43 alloy; appropriate biocompatibility was preserved as well. It was shown that the decrease in the mechanical strength caused by the omission of RE and Zr from the WE43 alloy could be compensated for by severe plastic deformation, as achieved in this study, by equal channel angular pressing. Ultrafine-grained W3 alloy exhibited compression yield strength of 362 ± 6 MPa and plastic deformation at maximum stress of 18 ± 1%. Overall, the early results of this study put forward the motion of avoiding RE elements and Zr in magnesium alloy as a suitable material for biodegradable applications and showed that solo alloying of yttrium is sufficient for maintaining desirable properties of the material at once.

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“…In the last two decades, this finding led to an extensive development of various SPD techniques that introduce large plastic strains (exceeding hundreds of percent) into the workpieces. Equal channel angular pressing (ECAP) [6][7][8] and high-pressure torsion (HPT) processes [9][10][11] have been considered as the most popular and widely applied SPD methods so far. These techniques impose shear deformation on the workpieces during processing of the samples in special dies, preserving the original dimension and shape of the samples.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution in Cu–0.5 wt% Zr Alloy Processed by a Novel Severe Plastic Deformation Technique of Rotational Constrained Bending

Krajňák

Janeček

Minárik

et al. 2020

Metals

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In the present study, a coarse-grained Cu–0.5 wt% Zr alloy was repeatedly processed by a novel technique of rotational constrained bending (RCB). In this technique, the workpiece was deformed by bending in a channel with an angle of 90°, using a rotating roller. The influence of the number of passes (N) of RCB on strain distribution, microstructure evolution and mechanical properties of the alloy was investigated. The heterogeneous distribution of the microhardness in the billet cross-section after the first pass was transformed into a homogeneous one after twelve passes, due to the rotation of the sample by 90° clockwise between individual passes. In addition, the gradual refinement/homogenization of the microstructure and formation of strong (110) crystallographic texture were found with increasing N. The initial grain size of 180 μm decreased down to 3.4 μm after twelve passes. The dislocation density increased by two orders of magnitude after RCB processing. In accordance with the grain-size refinement and the strong increase of the dislocation density, RCB processing significantly enhanced the strength of the alloy, while the ductility considerably decreased. The yield stress increased from 63 to 524 MPa, while the elongation to failure decreased below 10% after twelve passes.

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Effect of secondary phase particles on thermal stability of ultra-fine grained Mg-4Y-3RE alloy prepared by equal channel angular pressing

Cited by 25 publications

References 30 publications

Rare Earth Based Magnesium Alloys—A Review on WE Series

Rare Earth Based Magnesium Alloys—A Review on WE Series

Concurrence of High Corrosion Resistance and Strength with Excellent Ductility in Ultrafine-Grained Mg-3Y Alloy

Microstructure Evolution in Cu–0.5 wt% Zr Alloy Processed by a Novel Severe Plastic Deformation Technique of Rotational Constrained Bending

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