Thermal stability, grain growth kinetics, mechanical properties, and bio-corrosion resistance of pure Mg, ZK30, and ZEK300 alloys: A comparative study

Savaedi, Zeinab; Mirzadeh, Hamed; Aghdam, Rouhollah Mehdinavaz; Mahmudi, R.

doi:10.1016/j.mtcomm.2022.104825

Cited by 14 publications

(3 citation statements)

References 53 publications

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“…The i Corr of Mg-0.5Zr-0.5Ca-0.5Zn alloy is higher than the i Corr of Mg-0.5Zr-0.5Ca alloy due to its finer grain size and increased grain boundary density, which are susceptible to corrosion. [49][50][51] The anodic branches of PDP curves for Mg-0.5Zr-0.5Ca and Mg-0.5Zr-0.5Ca-0.5Zn alloys exhibit instability (with fluctuations) as shown by an arrow in Figure 4a, which implies that the films on their surfaces repeatedly break and reform. For Mg-0.5Zr-0.5Ca-1Zn, Mg-0.5Zr-0.5Ca-2Zn, and Mg-0.5Zr-0.5Ca-7Zn alloys, the fluctuations of the anodic branch disappear, indicating the formation of a stable protective film on the surface, which can contribute to the enhancement of corrosion resistance.…”

Section: Electrochemical Testsmentioning

confidence: 99%

Mechanical Properties and Corrosion Behavior of Biodegradable Mg–0.5Zr–0.5Ca–xZn Magnesium Alloys

et al. 2023

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Mechanical properties and in vitro corrosion behavior of biodegradable Mg–0.5Zr–0.5Ca–xZn alloys in the simulated body fluid (SBF) solution are investigated. Zinc addition leads to a remarkable grain refinement in the as‐cast condition, as well as the formation of Ca2Mg6Zn3 and Mg7Zn3 compounds. As a result, the lean Mg–0.5Zr–0.5Ca–1Zn alloy shows the best combination of mechanical properties with an ultimate tensile strength (UTS) of 182 MPa, total elongation of 9.5%, and tensile toughness of 13 MJ m−3, which reveals ≈80%, 72%, and 190% improvements compared to those obtained for the Mg–0.5Zr–0.5Ca alloy, respectively. This sample also exhibits improved corrosion behavior, where a decrease in the corrosion current density (iCorr) is recorded via the addition of 1 wt% Zn. However, higher Zn additions result in the formation of a quasi‐continuous eutectic network with the consequent deterioration of tensile properties and increased effect of microgalvanic couples. The extreme grain refinement induced by the dynamic recrystallization (DRX) remarkably improves the overall mechanical properties of the hot extruded alloy but increased the iCorr. Accordingly, the properties of Mg–0.5Zr–0.5Ca alloys can be tailored for biomedical applications via Zn addition and thermomechanical processing.

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Section: Electrochemical Testsmentioning

confidence: 99%

Mechanical Properties and Corrosion Behavior of Biodegradable Mg–0.5Zr–0.5Ca–xZn Magnesium Alloys

et al. 2023

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“…Among these, Magnesium (Mg) metal has received increasing attention given its degradability, excellent biocompatibility, and mechanical compatibility (e.g., elastic modulus and density close to those of the human bone) [3][4][5]. However, insufficient mechanical properties [6] and a fast corrosion rate [7] (especially in electrolytes containing chloride ions [8]) limit its clinical application. Erinc et al [9] put forward criteria to evaluate the Mg used in biodegradable implants: (1) corrosion rate in simulated body fluid (SBF) at 37 • C < 0.5 mm/year; (2) yield strength (YS) > 200 MPa and elongation (EL) > 15%.…”

Section: Introductionmentioning

confidence: 99%

Effect of Extrusion on Mechanical Property, Corrosion Behavior, and In Vitro Biocompatibility of the As-Cast Mg-Zn-Y-Sr Alloy

Huang,

Yang,

et al. 2024

Materials

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The effect of extrusion on the microstructure, mechanical property, corrosion behavior, and in vitro biocompatibility of as-cast Mg-1.5Zn-1.2Y-0.1Sr (wt.%) alloy was investigated via tensile tests, electrochemical methods, immersion tests, methylthiazolyl diphenyltetrazolium bromide (MTT), and analytical techniques. Results showed that the as-cast and as-extruded Mg-1.5Zn-1.2Y-0.1Sr alloys comprised an α-Mg matrix and Mg3Y2Zn3 phase (W-phase). In the as-cast alloy, the W-phase was mainly distributed at the grain boundaries, with a small amount of W-phase in the grains. After hot extrusion, the W-phase was broken down into small particles that were dispersed in the alloy, and the grains were refined considerably. The as-extruded alloy exhibited appropriate mechanical properties that were attributed to refinement strengthening, dispersion strengthening, dislocation strengthening, and precipitation strengthening. The as-cast and as-extruded alloys exhibited galvanic corrosion between the W-phase and α-Mg matrix as the main corrosion mechanism. The coarse W-phase directly caused the poor corrosion resistance of the as-cast alloy. The as-extruded alloy obtained via hydrogen evolution and mass loss had corrosion rates of less than 0.5 mm/year. MTT, high-content screening (HCS) analysis, and cell adhesion tests revealed that the as-extruded alloy can improve L929 cell viability and has great potential in the field of biomedical biodegradable implant materials.

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“…The 347H austenitic heat-resistant steel finds wide applications in boilers' superheater tubes in USC power plants since the steel is not only cost-effective but also capable of withstanding the designed steam pressure (35 MPa) and temperatures in the range of 650-760°C [3][4][5]. The control of grain growth in heatresistant alloys and other polycrystalline materials is technologically important since many mechanical properties are strongly dependent on their microstructures, especially on the grain size and its distribution [6][7][8][9][10]. Although some studies have been reported on the grain growth behaviour in 347 alloy steel, they either lack in establishing the quantitative aspects of the kinetics of grain growth [11] or the quantitative study misses the designed temperature range for a boiler's operation [12].…”

Section: Introductionmentioning

confidence: 99%

Austenite-Grain-Growth Kinetics and Mechanism in Type 347H Alloy Steel for Boiler Tubes

Huda,

Zaharinie,

Aniszulaikha

et al. 2023

Advances in Materials Science

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The research material (type 347H alloy steel) has been characterized using optical microscopy and an EDS/SEM system. Annealing experiments have been conducted at temperatures range of 600–1050°C for 30 min–20 h by using an atmosphere-controlled furnace. Normal grain growth with intermediate grain size has been related to the favouring of creep resistance to recommend the material suitable for boiler tubes at operating temperatures up to 750°C for long duration. The kinetics of grain growth in the 347H has been shown to behave similar to a pure metal in the initial stage of annealing in the range of 0–30 min, beyond which the grain-growth process was found to be suppressed due to second-phase (NbC) particle-pinning and solute drag effects. The grain-growth exponent n is computed to be in the range of 0.117–0.313; the deviation from ideal kinetic behavior (n=0.5) has been scientifically justified. The activation energy for grain growth Qg, for the investigated alloy, has been graphically computed and validated.

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Thermal stability, grain growth kinetics, mechanical properties, and bio-corrosion resistance of pure Mg, ZK30, and ZEK300 alloys: A comparative study

Cited by 14 publications

References 53 publications

Mechanical Properties and Corrosion Behavior of Biodegradable Mg–0.5Zr–0.5Ca–xZn Magnesium Alloys

Mechanical Properties and Corrosion Behavior of Biodegradable Mg–0.5Zr–0.5Ca–xZn Magnesium Alloys

Effect of Extrusion on Mechanical Property, Corrosion Behavior, and In Vitro Biocompatibility of the As-Cast Mg-Zn-Y-Sr Alloy

Austenite-Grain-Growth Kinetics and Mechanism in Type 347H Alloy Steel for Boiler Tubes

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