Synergetic effects of solute and strain in biocompatible Zn-based and Mg-based alloys

Guo, Yuanyuan; Zhang, Shihao; Beyerlein, Irene J.; Legut, Dominik; Shang, Shun‐Li; Liu, Zhe; Zhang, Ruifeng

doi:10.1016/j.actamat.2019.09.059

Cited by 23 publications

(4 citation statements)

References 117 publications

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“…As the accurate experimental measurement of stable SFEs is often elusive and the unstable SFEs cannot be obtained from experimental measurements, the first‐principle calculations of generalized stacking fault energy (GSFE) curves ( γ ‐curves) have become an effective tool in the analysis and prediction of the GSFEs, deformation mechanism, and mechanical properties of materials 33–37 . Based on γ ‐curves, important quantities such as the stable and unstable SFEs of an intrinsic stacking fault (ISF, γ isf , and γ us ) and a twinning fault (TF, γ tf and γ ut ) can be derived.…”

Section: Introductionmentioning

confidence: 99%

Effect of alloying elements on stacking fault energies and twinnabilities in high‐entropy transition‐metal carbides

Wang

Huang

et al. 2021

J Am Ceram Soc.

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Twinning is a fundamental mechanism behind the simultaneous increase in the strength and ductility of high‐entropy alloys. Similar approaches may contribute to the remarkable improvements of the mechanical properties of high‐entropy ceramics. In this study, the stacking fault energies (SFEs) and twinnabilities of a novel category of ZrNbTa‐based high‐entropy transition‐metal carbides (HETMCs) are investigated in terms of their generalized stacking fault energy curves (γ‐curves) via first‐principle calculations. The γ‐curves show that dislocation nucleation in ZrNbTa‐based HETMCs occurs more easily than that of unary transition metal (TM, TM = Zr, Nb, Ta, Hf, Ti, V) carbides. When a pre‐existing intrinsic stacking fault (ISF) is considered, C‐ vertices (TM‐ mirror) twinning fault (TF) more likely forms and TF may be more stable than ISF. The stable SFEs of C‐ vertices ISF and TF decrease with the addition of Hf, Ti, and V atoms to (ZrNbTa)C owing to the severe local lattice distortion. The calculated barrier energies and twinnabilities further indicate that twinning is possible for the selected ZrNbTa‐based HETMCs. Theoretical twinnabilities (τa) decrease in the following sequence: (ZrNbTa)C > (ZrNbTaHfTi)C > (ZrNbTaHf)C > (ZrNbTaHfTiV)C. Thus, the addition of Hf, Ti, and V atoms to (ZrNbTa)C may decrease the twinning probability. This study may be used as a guide for the design of twinning‐induced plasticity HETMCs with excellent mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Effect of alloying elements on stacking fault energies and twinnabilities in high‐entropy transition‐metal carbides

Wang

Huang

et al. 2021

J Am Ceram Soc.

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“…Since these precipitates contain Zn, the matrix Mg is relatively free of Zn, which could increase lattice resistant to dislocation glide compared to an Mg matrix containing Zn. Atomistic simulations have shown that addition of Zn in Mg lowers the Peierls barrier and broaden the equilibrium core size of basal dislocations 69 .…”

Section: Discussionmentioning

confidence: 99%

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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“…The XRD results confirmed the presence of two phases identified as αLiZn4 and βLiZn4 with theoretical c/a ratios of about 1.598 and 1.580, respectively, which is slightly lower than the perfect 1.63 value of c/a ratio for HCP metals. This implies good plasticity of LiZn4 via multiple twinning and slip systems which are restricted in Zn [47]. The Zn matrix enrichment in Mn, Mg and Cu caused intermetallic phases precipitation but their detection was challenging.…”

Section: The Effect Of the Processing Route On Microstructure Develop...mentioning

confidence: 99%

Enhanced mechanical properties and microstructural stability of ultrafine-grained biodegradable Zn–Li–Mn–Mg–Cu alloys produced by rapid solidification and high-pressure torsion

Bednarczyk,

Wątroba,

Cieślak

et al. 2024

Materials Science and Engineering: A

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Synergetic effects of solute and strain in biocompatible Zn-based and Mg-based alloys

Cited by 23 publications

References 117 publications

Effect of alloying elements on stacking fault energies and twinnabilities in high‐entropy transition‐metal carbides

Effect of alloying elements on stacking fault energies and twinnabilities in high‐entropy transition‐metal carbides

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

Enhanced mechanical properties and microstructural stability of ultrafine-grained biodegradable Zn–Li–Mn–Mg–Cu alloys produced by rapid solidification and high-pressure torsion

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