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

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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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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Ductile Ti-Based Bulk Metallic Glasses with High Specific Strength

Metallurgical and Materials Transactions A ◽

10.1007/s11661-010-0416-y ◽

2010 ◽

Vol 42 (6) ◽

pp. 1456-1462 ◽

Cited By ~ 32

Author(s):

J. M. Park ◽

G. Wang ◽

S. Pauly ◽

N. Mattern ◽

D. H. Kim ◽

...

Keyword(s):

Metallic Glasses ◽

Bulk Metallic Glasses ◽

Specific Strength ◽

High Specific Strength

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Fiber metallic glass laminates

Journal of Materials Research ◽

10.1557/jmr.2010.0291 ◽

2010 ◽

Vol 25 (12) ◽

pp. 2287-2291 ◽

Cited By ~ 2

Author(s):

B.A. Sun ◽

K.P. Cheung ◽

J.T. Fan ◽

J. Lu ◽

W.H. Wang

Keyword(s):

Metallic Glass ◽

Metallic Glasses ◽

Tensile Ductility ◽

Bulk Metallic Glasses ◽

Structural Features ◽

Al Alloys ◽

Low Density ◽

Glass Composite ◽

Specific Strength ◽

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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