Ti-Based Bulk Metallic Glasses with High Specific Strength

The fabrication and properties of fiber metallic glass laminates (FMGL) composite composed of Al-based metallic glasses ribbons and fiber/epoxy layers were reported. The metallic glass composite possesses structural features of low density and high specific strength compared to Al-based metallic glass and crystalline Al alloys. The material shows pronounced tensile ductility compared to monolithic bulk metallic glasses.

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Preparation, Characterization, and Properties of Novel Ti-Zr-Be-Co Bulk Metallic Glasses

Materials ◽

10.3390/ma13010223 ◽

2020 ◽

Vol 13 (1) ◽

pp. 223 ◽

Cited By ~ 1

Author(s):

Pan Gong ◽

Fangwei Li ◽

Junsong Jin

Keyword(s):

Corrosion Resistance ◽

Metallic Glasses ◽

Crystallization Behavior ◽

Base Alloy ◽

Bulk Metallic Glasses ◽

Critical Diameter ◽

Glass Forming Ability ◽

Specific Strength ◽

Glass Forming ◽

Co Addition

We developed novel Ti-Zr-Be-Co bulk metallic glasses through Co addition based on a ternary Ti45Zr20Be35 alloy. By altering the alloying routes and alloying contents, the influence of Co alloying on glass-forming ability, thermal stability, thermoplastic formability, crystallization behavior, and corrosion resistance has been investigated systematically. It was found that the best alloying route for enhancing the glass-forming ability, thermoplastic formability, compressive plasticity, and corrosion resistance is to replace Be by Co. Ti45Zr20Be23Co12 possesses the largest critical diameter of 15 mm for glass formation. Ti45Zr20Be27Co8 possesses the highest thermoplastic formability which is comparable to that of Vitreloy alloys. Ti45Zr20Be25Co10 exhibits the largest room temperature plasticity of 15.7% together with a high specific strength of 3.90 × 105 Nm/kg. The addition of Co also strongly affects the crystallization behavior of the base alloy, resulting in a more complex crystallization process. The corrosion resistance of Ti-Zr-Be alloy in 1 mol/L HCl solution can also be enhanced by Co alloying. The related mechanisms have been explained in detail, which provide guidance for the composition design of Ti-based metallic glasses with improved properties.

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Al-rich bulk metallic glasses with plasticity and ultrahigh specific strength

Scripta Materialia ◽

10.1016/j.scriptamat.2009.04.035 ◽

2009 ◽

Vol 61 (4) ◽

pp. 423-426 ◽

Cited By ~ 166

Author(s):

B.J. Yang ◽

J.H. Yao ◽

J. Zhang ◽

H.W. Yang ◽

J.Q. Wang ◽

...

Keyword(s):

Metallic Glasses ◽

Bulk Metallic Glasses ◽

Specific Strength

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A Brief Introduction on the Development of Ti-Based Metallic Glasses

Frontiers in Materials ◽

10.3389/fmats.2021.814629 ◽

2022 ◽

Vol 8 ◽

Author(s):

M. Zhang ◽

Y.Q. Song ◽

H.J. Lin ◽

Z. Li ◽

W. Li

Keyword(s):

Metallic Glasses ◽

High Strength ◽

Specific Strength ◽

Glass Forming ◽

High Specific Strength ◽

Wear And Corrosion ◽

Low Elastic Modulus ◽

High Elasticity ◽

Wear And Corrosion Resistance ◽

Element Free

Ti-based metallic glasses (MGs) possess high specific strength, low elastic modulus, high elasticity, high wear and corrosion resistance, and excellent biocompatibility, which make them highly attractive as lightweight high-strength materials as well as biomaterials. However, the glass forming ability (GFA) of Ti-based MGs, particularly those bearing no toxic, noble, or heavy metals, that is, Be, Pd, or Cu alike, largely sets back their wide applications for the restricted critical glass forming size of these Ti-based MGs. In this review, the outlines in developing Ti-based MGs are delineated in order to provide an overall view on the efforts ever made to fabricate bulk size Ti-based MGs. The state of the art in the knowledge on the GFA of Ti-based MGs is briefly introduced, and possible directions for fabricating bulk size toxic and noble element free Ti-based MGs are discussed.

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Centimeter-sized Ti-rich bulk metallic glasses with superior specific strength and corrosion resistance

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2018.10.034 ◽

2019 ◽

Vol 512 ◽

pp. 206-210 ◽

Cited By ~ 9

Author(s):

Jialun Gu ◽

Xinglong Yang ◽

Ailing Zhang ◽

Yang Shao ◽

Shaofan Zhao ◽

...

Keyword(s):

Corrosion Resistance ◽

Metallic Glasses ◽

Bulk Metallic Glasses ◽

Specific Strength

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Mg-rich Mg–Ni–Gd ternary bulk metallic glasses with high compressive specific strength and ductility

Journal of Materials Research ◽

10.1557/jmr.2007.0034 ◽

2007 ◽

Vol 22 (2) ◽

pp. 334-338 ◽

Cited By ~ 31

Author(s):

E.S. Park ◽

H.J. Chang ◽

D.H. Kim

Keyword(s):

Metallic Glasses ◽

Compressive Loading ◽

Bulk Metallic Glasses ◽

Amorphous State ◽

High Strength ◽

Mixing Enthalpy ◽

Specific Strength ◽

Atom Pairs ◽

Wide Range ◽

Injection Casting

In the present study, we show by tailoring the combinations of the bonding energy among the elements in the liquid state, glass forming ability and compressive mechanical properties of the metallic glasses (MGs) can be improved. The mixing enthalpy values for binary atom pairs in the ternary Mg–Ni–Gd alloys (Mg–Ni: −12 kJ/mol, Mg–Gd: −27 kJ/mol, Ni–Gd: −161 kJ/mol) covers a wide range, although they are all negative. Mg-rich Mg–Ni–Gd (Mg > 70 at.%) alloys can be readily solidified into an amorphous state in a wide composition range up to 4 mm in diameter using the injection casting method; they exhibit the highest level of glass transition temperature Tg among those reported in Mg-based MGs so far. In particular, Mg-rich Mg–Ni–Gd bulk metallic glasses with 10–15 at.% Ni and 10–15 at.% Gd exhibit high strength over 900 MPa and large plastic strain up to ∼2% during compressive loading.

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Estimate Biocompatibility and Injection-Molding Processability of Ti-Based Metallic Glasses for Dental Implant

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.57.216 ◽

2008 ◽

Vol 57 ◽

pp. 216-219

Author(s):

Jeong Jung Oak ◽

Hisamichi Kimura ◽

Akihisa Inoue

Keyword(s):

Corrosion Resistance ◽

Metallic Glass ◽

Metallic Glasses ◽

High Corrosion Resistance ◽

Specific Strength ◽

Glass Forming ◽

High Specific Strength ◽

Medical Reports ◽

Superior Corrosion Resistance

Recently, Ti-based metallic glasses aim at biomaterials with their high specific strength and superior corrosion resistance. Their high workability also shows a good performance for mass production under the energy saving environment. In this study, we started investigation of the design of Ti-based metallic glasses with the restricted alloying elements for biocompatibility and characteristic evaluation of the optimized Ti-based metallic glasses with higher glass forming ability for dental implants. These Ti-based metallic glasses do not contain Al, V and Ni elements which are well known to be neurotoxicity and cytotoxicity for human body. Current medical reports of impracticability by these elements have been a hot issue in biomaterials science. Newly designed Ti-based metallic glasses exhibit good performances. Especially, the optimized Ti-based metallic glass has high corrosion resistance with better passivity in a wide passivation range in simulated body fluids at 310K. In addition, biocompatibility of Ti-based metallic glass was also evaluated by cell culture in vitro. Excellent biocompatibility of Ti-based metallic glass show high potentials to be applied as biomaterials that necrosis of osteoblast (SaOS2) was not detected in this study.

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Mg–Ni–(Gd,Nd) bulk metallic glasses with improved glass-forming ability and mechanical properties

Journal of Materials Research ◽

10.1557/jmr.2009.0255 ◽

2009 ◽

Vol 24 (6) ◽

pp. 2130-2140 ◽

Cited By ~ 14

Author(s):

J. Yin ◽

G.Y. Yuan ◽

Z.H. Chu ◽

J. Zhang ◽

W.J. Ding

Keyword(s):

Metallic Glasses ◽

Glass Forming Ability ◽

Compressive Yield Strength ◽

Specific Strength ◽

Glass Forming ◽

Copper Mold Casting ◽

High Specific Strength ◽

Mold Casting ◽

Lightweight Engineering ◽

High Level

In this work, we report a new Mg-based glass-forming system of Mg–Ni–(Gd,Nd), which can be produced into glassy rods with maximum diameters of 2–5 mm by copper mold casting. The Mg75Ni15Gd10–xNdx(x = 0–10) BMGs simultaneously possess a high level of glass transition temperatures, high specific strength up to 2.75 × 105 Nm/kg, and enhanced malleability with plastic strains over 1%. In particular, the Mg75Ni15Gd5Nd5 BMG with the glass-forming ability (GFA) up to 5 mm, exhibited compressive yield strength over 900 MPa and plastic strain up to 50% without failure for the specimen with an aspect ratio of 0.5. The improved GFA and malleability for the Mg75Ni15Gd10–x Ndx(x = 0–10) BMGs were discussed, which exhibited their promising potentials for the application as lightweight engineering materials.

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Precipitation in Al-Li-Cu Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100096941 ◽

1981 ◽

Vol 39 ◽

pp. 44-45

Author(s):

J. E. O'Neal ◽

K. K. Sankaran

Keyword(s):

Electron Microscopy ◽

Age Hardening ◽

Precipitation Behavior ◽

Zone Formation ◽

Specific Strength ◽

Hardening Behavior ◽

Cu Alloys ◽

High Specific Strength ◽

Transmission Electron ◽

Structural Applications

Al-Li-Cu alloys combine high specific strength and high specific modulus and are potential candidates for aircraft structural applications. As part of an effort to optimize Al-Li-Cu alloys for specific applications, precipitation in these alloys was studied for a range of compositions, and the mechanical behavior was correlated with the microstructures.Alloys with nominal compositions of Al-4Cu-2Li-0.2Zr, Al-2.5Cu-2.5Li-0.2Zr, and Al-l.5Cu-2.5Li-0.5Mn were argon-atomized into powder at solidification rates ≈ 103°C/s. Powders were consolidated into bar stock by vacuum pressing and extruding at 400°C. Alloy specimens were solution annealed at 530°C and aged at temperatures up to 250°C, and the resultant precipitation was studied by transmission electron microscopy (TEM).The low-temperature (≲100°C) precipitation behavior of the Al-4Cu-2Li-0.2Zr alloy is a combination of the separate precipitation behaviors of Al-Cu and Al-Li alloys. The age-hardening behavior at these temperatures is characteristic of Guinier-Preston (GP) zone formation, with additional strengthening resulting from the coherent precipitation of δ’ (Al3Li, Ll2 structure), the presence of which is revealed by the selected-area diffraction pattern (SADP) shown in Figure la.

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