Structure and mechanical characterization of Mg-Nd-Zn alloys prepared by different processes

Dvorský, Drahomír; Kubásek, Jiří; Vojtěch, Dalibor; Voňavková, Ilona; Veselý, Martin; Čavojský, Miroslav

doi:10.1088/1757-899x/179/1/012018

Cited by 12 publications

(7 citation statements)

References 17 publications

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“…On the contrary, if the tensile force is applied in parallel to the extrusion direction, the twinning mechanism is suppressed and the basal slip is difficult due to preferential texture and grain orientation. 22 The highest value of the tensile yield strength reached up to 337 MPa, which is higher than was achieved by Cabeza et al 4 (211 MPa). They prepared samples by extrusion at the same temperature but with extrusion ratio of 32.…”

Section: Mechanical Propertiesmentioning

confidence: 64%

Effect of heat pre-treatment and extrusion on the structure and mechanical properties of WZ21 magnesium alloy

Dvorský¹,

Kubásek²,

Vojtìch³

et al. 2018

Mater. Tehnol.

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The magnesium alloy WZ21 was prepared by a combination of conventional casting, extrusion and heat treatment. The effect of various processing conditions on the final structure, mechanical and corrosion properties were investigated. Long-period stacking ordered (LPSO) phases were observed in the as-cast structure; however, they were at least partially dissolved during the extrusion or heat treatment. Thermally stable Mg24Y5 was observed in the structure as another dominant phase. The application of heat treatment to extruded products causes significant grain growth, and, therefore, the loss of mechanical properties. On the contrary, heat treatment performed before extrusion has a strong positive effect on the observed mechanical properties. In both cases, the thermal treatment positively affected the corrosion resistance of the prepared materials although the effect is more significant for material annealed before extrusion. After appropriate processing, the WZ21 alloy was characterized by the high value of the tensile yield strength of 337 MPa and really promising corrosion rate in simulated body fluid (SBF) (0.75 mm/year).

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Section: Mechanical Propertiesmentioning

confidence: 64%

Effect of heat pre-treatment and extrusion on the structure and mechanical properties of WZ21 magnesium alloy

Dvorský¹,

Kubásek²,

Vojtìch³

et al. 2018

Mater. Tehnol.

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“…Zhang et al prepared a Mg-2.0Nd-0.2 wt.% Zn alloy by friction stir processing, which resulted in grain refinement to~2 µm [13]. Analogous grain refinement to the grain size of~2 µm was achieved by Dvorský et al in a similar Mg-3.0Nd-0.5Zn alloy, processed by hot extrusion only [14].…”

Section: Introductionmentioning

confidence: 89%

Texture Hardening Observed in Mg–Zn–Nd Alloy Processed by Equal-Channel Angular Pressing (ECAP)

Stráská

Minárik

Šašek

et al. 2019

Metals

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The addition of Nd significantly improves the mechanical properties of magnesium alloys. However, only limited amounts of Nd or other rare earth (RE) elements should be used due to their high price. In this study, a low-alloyed Mg–1% Zn–1% Nd (ZN11) alloy was designed and processed by hot extrusion and subsequent equal-channel angular pressing (ECAP) in order to achieve a very fine-grained condition with enhanced strength. The microstructure, texture, and mechanical properties were thoroughly studied. The microstructure after 8 passes through ECAP was homogeneous and characterized by an average grain size of 1.5 µm. A large number of tiny secondary phase precipitates were identified as ordered Guinier–Preston (GP) zones. Detailed analysis of the Schmid factors revealed the effect of the texture on deformation mechanisms. ECAP processing more than doubled the achieved yield compression strength (YCS) of the ZN11 alloy. Significant strengthening by ECAP is caused by grain refinement and the formation of ordered Guinier–Preston zones and particles of a secondary γ-phase.

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“…The results from tensile tests of the extruded profile compared to WE43 PM (the results published by Kubásek in [30,31]) are summarized in Fig. 3a.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Microstructure and mechanical properties of extruded profiles made from pure magnesium powders

Čavojský¹,

Trembošová²,

Beronská³

et al. 2020

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Magnesium-based biomaterials are good candidates as a new generation of biodegradable metals since magnesium (Mg) can dissolve in body fluid. Therefore, implanted Mg can degrade during the healing process, and if the degradation rate is controlled no debris after completion of healing is expected. Besides its biocompatibility, inherent mechanical properties of Mg are very similar to those of human bone. This paper is focused on the possibility to prepare the pure Mg material from powders with further intention to use it as a biodegradable implant. Powders were consolidated via cold compaction to prepare the extrusion billets which were subsequently directly extruded to final profiles at a controlled temperature to avoid the formation of the thick oxide layer. The microstructure is revealed through SEM, SEM--EBSD, TEM, and HRTEM and mechanical properties are determined via a uniaxial tensile test. Results are compared with Mg ingot and WE43 alloy, which is commercially used for biodegradable (biocompatible) material. K e y w o r d s : magnesium, powder metallurgy, biocompatibility, microstructure, mechanical properties

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Structure and mechanical characterization of Mg-Nd-Zn alloys prepared by different processes

Cited by 12 publications

References 17 publications

Effect of heat pre-treatment and extrusion on the structure and mechanical properties of WZ21 magnesium alloy

Effect of heat pre-treatment and extrusion on the structure and mechanical properties of WZ21 magnesium alloy

Texture Hardening Observed in Mg–Zn–Nd Alloy Processed by Equal-Channel Angular Pressing (ECAP)

Microstructure and mechanical properties of extruded profiles made from pure magnesium powders

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