Glass-Forming Ability and Mechanical Properties of Fe-Ni-Zr-Si-B Bulk Glassy Alloys

The effects of structural relaxation and partial crystallization on the mechanical property of the Ti40Zr29Cu9Ni8Be14 bulk metallic glass (BMG) have been investigated. The atomic structure of the as-cast Ti40Zr29Cu9Ni8Be14 metallic glass transforms into a more relaxed state at the temperature region of 452 –585 K, below the crystallization onset temperature of 631 K. Stable icosahedral phase forms in the amorphous matrix by growth of the pre-existing nuclei in the amorphous matrix during first crystallization step. The compressive plastic strain of the as-cast Ti40Zr29Cu9Ni8Be14 BMG is 6.7 %, and decreases when the structural relaxation occurs. However, the plastic strain increases when a few nanometer size icosahedral phase particles form in the amorphous matrix by the partial crystallization treatment.

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Observation of the Complex Local Crystallization Process in Ti-Zr-Cu-Pd Amorphous Ribbons and Bulk Metallic Glass

Archives of Metallurgy and Materials ◽

10.2478/v10172-012-0196-z ◽

2013 ◽

Vol 58 (2) ◽

pp. 347-350 ◽

Cited By ~ 2

Author(s):

A. Sypień

Keyword(s):

Metallic Glass ◽

Metallic Glasses ◽

Crystallization Process ◽

Amorphous Matrix ◽

Glass Forming Ability ◽

Duplex Microstructure ◽

Glass Forming ◽

Amorphous Ribbons ◽

Nanocrystalline Particles ◽

High Resolution Tem

In recent years, bulk metallic glasses (BMGs) have attracted much attention, especially concerning the reasons for the high glass-forming ability. To understand properties and glass-forming ability of BMGs, it is important to investigate their atomic structure in details. The structure of the metallic glass, derived from diffraction studies, confines mainly to short-range-order atomic correlations, which are statistically averaged over the glassy specimens. In the present study, local structure of a BMG and ribbons was observed using a high-resolution TEM (TECNAI G2 FEG). The TEM images of the BMG before annealed in the temperature below the crystallization clearly reveal a duplex microstructure consisting of nanocrystalline particles about 5-10 nm in size distributed uniformly in the amorphous matrix. Due to the FFT research the crystalline phases may be indexed as the Cu8Zr3, Cu3Pd, CuTi2 and CuTiZr.

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Nanostructure formed by phase separation of fcc-Al from eutectic crystallization in the Al85Ni10Ce5 metallic glass

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.146-147.5 ◽

2010 ◽

Vol 146-147 ◽

pp. 5-9 ◽

Cited By ~ 1

Author(s):

Sheng Hai Wang ◽

Wei Wang ◽

Jian Min Wang

Keyword(s):

Phase Separation ◽

Intermetallic Compound ◽

Metallic Glass ◽

Nucleation Rate ◽

Amorphous Matrix ◽

Growth Control ◽

Glass Forming Ability ◽

Glass Forming ◽

Eutectic Crystallization ◽

Si Addition

A nucleation-growth control for Al85Ni10Ce5 glass has transformed to a growth control for Al83Ni10Ce5Si2 glass. That’s to say a small quantity of Si addition can successfully separate the Al phase to single precipitate from a eutectic precipitation composited of Al and other intermetallic compound to synthesize nanostructured materials, characteristic of microstructures with finely dispersed nanoccrystalline Al in an amorphous matrix. Favorably，no evident decrease of glass forming ability is observed in the transformation. We suggest that the Si atoms solve into Al lattice to sever as pre-exist nucleus for fcc-Al, in the same time; a nucleation reaction of fcc-Al is accompanied to compensate the nucleation rate.

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Fe-metalloids bulk glassy alloys with high Fe content and high glass-forming ability

Journal of Materials Research ◽

10.1557/jmr.2008.0180 ◽

2008 ◽

Vol 23 (5) ◽

pp. 1339-1342 ◽

Cited By ~ 16

Author(s):

Akihiro Makino ◽

Takeshi Kubota ◽

Chuntao Chang ◽

Masahiro Makabe ◽

Akihisa Inoue

Keyword(s):

Metallic Glass ◽

Energy Saving ◽

Bulk Metallic Glass ◽

Glass Forming Ability ◽

Metal Elements ◽

Glass Forming ◽

Glassy Alloys ◽

Fe Content ◽

Unusual Combination ◽

Magnetic Softness

The coexistence of high Fe content and high glass-forming ability (GFA) has been earnestly desired from academia to industry. We report a novel Fe76Si9B10P5 bulk metallic glass with an unusual combination of high magnetization of 1.51 T due to high Fe content as well as high GFA leading to a glassy rod with a diameter of 2.5 mm despite not containing any glass-forming metal elements. This alloy composed of familiar and low-priced elements, also exhibiting very excellent magnetic softness, has a great advantage for engineering and industry, and thus should make a contribution to energy saving and conservation of earth’s resources and environment.

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A Centimeter-Sized Quaternary Ti-Zr-Be-Ag Bulk Metallic Glass

Advances in Materials Science and Engineering ◽

10.1155/2014/192187 ◽

2014 ◽

Vol 2014 ◽

pp. 1-5 ◽

Cited By ~ 4

Author(s):

S. F. Zhao ◽

Y. Shao ◽

P. Gong ◽

K. F. Yao

Keyword(s):

Yield Strength ◽

Metallic Glass ◽

Bulk Metallic Glass ◽

Glassy Alloy ◽

Critical Diameter ◽

Supercooled Liquid ◽

Glass Forming Ability ◽

Liquid Temperature ◽

Glass Forming ◽

Glassy Alloys

A novel centimeter-sized Ti-based bulk metallic glass (BMG) was developed by the addition of Ag in the ternary Ti41Zr25Be34glassy alloy. By replacing Be with Ag, the glass forming ability (GFA), the yield strength, and the supercooled liquid temperature of the quaternaryTi41Zr25Be34−xAgx(x=2, 4, 6, 8 at.%) glassy alloys have been obviously enhanced. Among the developed Ti-Zr-Be-Ag alloy systems, the Ti41Zr25Be28Ag6alloy possesses the largest critical diameter (Dmax) of 10 mm, while the yield strength is also enhanced to 1961 MPa, which is much larger than that of Ti41Zr25Be34(1755 MPa) alloy. The experimental results show that Ag is an effective element for improving the GFA and the yield strength of Ti-Zr-Be glassy alloy.

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