Effects of Zn content on the microstructure and the mechanical and corrosion properties of as-cast low-alloyed Mg–Zn–Ca alloys

Qin, Shi-kai; Ma, Ying-zhong; Wang, Jian; Liu, Yun-jin; Zhang, Jishan

doi:10.1007/s12613-018-1628-1

Cited by 39 publications

(12 citation statements)

References 30 publications

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“…To demonstrate the superior strengths of this alloy, Fig. 4 compares its strength-elongation strain to several classes of Mg alloys, including those with higher concentrations of solutes than this alloy (labeled "high alloy"), or containing Al, or RE alloying elements 3,[8][9][10][11][12][13][14][15][16]26,27,32,[43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60] . For BioMg250, we include the yield and ultimate tensile strength and ductility in all three directions.…”

Section: Resultsmentioning

confidence: 99%

“…However, Ding et al 25 reported that more than 1wt.% Ca can deteriorate the corrosion resistance. The Zn addition helps to strengthen this type of alloy both by solid solution and precipitation hardening 20 , 21 , 26 . However, while Zn has a high solubility limit (6.2 wt.%) in Mg, a recent study reported that excessive Zn additions can promote corrosion rates, due to the formation of Zn-rich intermetallic particles that act as cathodic sites 11 , 27 .…”

Section: Introductionmentioning

confidence: 99%

“…A similar outcome has been reported with further additions of RE elements, yet RE has issues as noted above 13 , 19 . Furthermore, in many of these cases, the combined fractions of alloying elements are too high to be used as implant materials 3 , 9 – 11 , 13 – 15 , 26 , 33 . The human body can tolerate only a small amount of non-toxic elements (such as, Zn, Mn, and Ca) 3 , 34 .…”

Section: Introductionmentioning

confidence: 99%

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Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications

Alam

Pal

Decker

et al. 2020

Sci Rep

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Lightweight, recyclable, and plentiful Mg alloys are receiving increased attention due to an exceptional combination of strength and ductility not possible from pure Mg. Yet, due to their alloying elements, such as rare-earths or aluminum, they are either not economical or biocompatible. Here we present a new rare-earth and aluminum-free magnesium-based alloy, with trace amounts of Zn, Ca, and Mn (≈ 2% by wt.). We show that the dilute alloy exhibits outstanding high strength and high ductility compared to other dilute Mg alloys. By direct comparison with annealed material of the same chemistry and using transmission electron microscopy (TEM), high-resolution TEM (HR-TEM) and atom probe tomography analyses, we show that the high strength can be attributed to a number of very fine, Zn/Ca-containing nanoscale precipitates, along with ultra-fine grains. These findings show that forming a hierarchy of nanometer precipitates from just miniscule amounts of solute can invoke simultaneous high strength and ductility, producing an affordable, biocompatible Mg alloy.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications

Alam

Pal

Decker

et al. 2020

Sci Rep

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show abstract

“…Although the extruded REcontaining alloys exhibited better performance in the mechanical properties in particular, for instance, Mg-2.4Zn-0.8Gd alloy with a tensile yield strength (TYS) of 284 MPa and ultimate tensile strength (UTS) of 338 MPa [14], RE-free Mg alloys are more competitive for commercial utilization because of the biosafety [15]. According to our recent investigations [16][17][18], Mg-1.0Zn-0.2Ca alloy is promising as the base alloy for further alloy development if considering comprehensive mechanical and corrosion properties although its mechanical properties are still not enough for medical application.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical and corrosion properties of novel quaternary biodegradable extruded Mg–1Zn–0.2Ca-xAg alloys

Wang

Yuan

et al. 2020

Mater. Res. Express

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In the anastomotic surgery, the currently used degradable magnesium alloys are facing some bottleneck problems such as lower mechanical properties and slower degradation rate. In this study, the novel biodegradable extruded Mg-1Zn-0.2Ca-xAg (x=0, 1, 2, 4) alloys will be developed and the corresponding microstructure, mechanical, and corrosion properties after Ag addition will be investigated. The results indicate that with the Ag addition, the grain size is refined due to fully dynamic recrystallization and Ag 17 Mg 54 phase, an important strengthening phase, begin to be precipitated in the Ag-contained alloys. Due to the stronger solution strengthening and precipitation strengthening, the Mg-1Zn-0.2Ca-4Ag alloy attains the highest ultimate tensile strength among all the alloys. Moreover, Ag element also enhances the electrode potential of the matrix, reduces the susceptibility of pitting corrosion and accelerates the corrosion rate of the alloys by micro-galvanic corrosion between the second phases and the matrix from the analyses of corrosion products and 3D Volta potential map. As a result, 4Ag alloys attain the fastest degradation rate among all the alloys. Combing the mechanical and corrosion results, it can be seen that 4Ag alloys, as novel biodegradable magnesium alloys, can meet the requirement of anastomotic surgery preferably, exhibiting the better application prospects.

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“…However, elements such as Al, Zn, Ca, etc. can be used as alloying elements in magnesium alloys, where they are known to enhance the mechanical properties of the resulting alloys [8][9][10][11][12][13][14]. For example, Al can improve the strength and plasticity of the alloy and improve the structure of its oxide film [8][9]; the solid solubility of zinc in magnesium is high and decreases dramatically with decreasing temperature, which can cause solid-solution strengthening and aging strengthening of the alloy [10][11].…”

Section: Introductionmentioning

confidence: 99%

Effect of alloying elements on magnesium alloy damping capacities at room temperature

Wan

et al. 2019

Int J Miner Metall Mater

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Alloying is a good approach to increasing its strength but leads to a reduction of damping to pure magnesium. Classifying the alloying characteristics of various alloying elements in magnesium alloys and their combined effects on the damping and mechanical properties of magnesium alloys is important. In this paper, the properties of the Mg-0.6wt%X binary alloys were analyzed through strength measurements and dynamic mechanical analysis. The effects of foreign atoms on solid-solution strengthening and dislocation damping were studied comprehensively. The effect of solid solubility on damping capacity can be considered from two perspectives: the effect of single solid-solution atoms on the damping capacities of the alloy, and the effect of solubility on the damping capacities of the alloy. The results provide significant information that is useful in developing high-strength, high-damping magnesium alloys. This study will provide scientific guidance regarding the development of new types of damping magnesium alloys.

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Effects of Zn content on the microstructure and the mechanical and corrosion properties of as-cast low-alloyed Mg–Zn–Ca alloys

Cited by 39 publications

References 30 publications

Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications

Rare-earth- and aluminum-free, high strength dilute magnesium alloy for Biomedical Applications

Microstructure, mechanical and corrosion properties of novel quaternary biodegradable extruded Mg–1Zn–0.2Ca-xAg alloys

Effect of alloying elements on magnesium alloy damping capacities at room temperature

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