Study on deformation behavior in supercooled liquid region of a Ti-based metallic glassy matrix composite by artificial neural network

The influence of annealing on the structural changes and the mechanical properties of Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit-1) bulk metallic glass was systematically studied by varying the annealing times at 703 K. The evolution of the structural state at a relatively high temperature within the supercooled liquid region was studied by thermal analysis, x-ray diffraction, high-resolution transmission electron microscopy, extended x-ray absorption fine structure, and dilatometric measurements. The deformation behavior and the mechanical properties were also examined by carrying out hardness and compression tests for the specimens annealed for various times.

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Preparation and Characterization of Fe36Co36B20Si4Nb4 Nanocrystalline/Amorphous Matrix Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.391-392.778 ◽

2011 ◽

Vol 391-392 ◽

pp. 778-782

Author(s):

Gang Li ◽

Zhan Zhe Zhang

Keyword(s):

Amorphous Alloy ◽

Matrix Composite ◽

Amorphous Matrix ◽

Supercooled Liquid ◽

Supercooled Liquid Region ◽

Liquid Region ◽

Annealing Conditions ◽

Nanocrystalline Particles ◽

Nanocrystalline Phases

In this paper, we report a Fe-based nanocrystalline-amorphous matrix composite synthesised via partially crystallising an amorphous alloy. The microstructure of the composite was characterize. An amorphous rod of 2mm in diameter was initially prepared via injecting the melted Fe36Co36B20Si4Nb4 alloy into a copper mould in vacuum, which was confirmed to be completely amorphous by X-ray difraction（XRD）. Differential scanning calorimeteric（DSC）curve shown that the span △Tx of the supercooled liquid region and the reduced glass transition temperature（Tg/Tm）for the amorphous alloy are 40 K and 0.615, respectively. The composite composed of nanocrystalline particles homogeneously dispersed in an amorphous matrix was prepared by isothermal annealing. In this course, the amorphous Fe-based sample was held for different time at different temperature. The types of the nanocrystalline phases obtained in different annealing conditions were characterised by XRD and selected-area diffraction pattern（SAED）.The crystallization behavior of the amorphous Fe-based alloy was discussed.

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Artificial Neural Network Modeling to Evaluate and Predict the Deformation Behavior of ZK60 Magnesium Alloy During Hot Compression

Materials and Manufacturing Processes ◽

10.1080/10426910903124894 ◽

2010 ◽

Vol 25 (7) ◽

pp. 539-545 ◽

Cited By ~ 32

Author(s):

Y. J. Qin ◽

Q. L. Pan ◽

Y. B. He ◽

W. B. Li ◽

X. Y. Liu ◽

...

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Magnesium Alloy ◽

Deformation Behavior ◽

Network Modeling ◽

Hot Compression ◽

Neural Network Modeling ◽

Artificial Neural Network Modeling ◽

Artificial Neural ◽

Zk60 Magnesium Alloy

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Effect of WC content on glass formation, thermal stability, and phase evolution of a TiNbCuNiAl alloy synthesized by mechanical alloying

Journal of Materials Research ◽

10.1557/jmr.2008.0087 ◽

2008 ◽

Vol 23 (3) ◽

pp. 745-754 ◽

Cited By ~ 20

Author(s):

Y.Y. Li ◽

C. Yang ◽

W.P. Chen ◽

X.Q. Li

Keyword(s):

Thermal Stability ◽

Mechanical Alloying ◽

Volume Fraction ◽

High Volume ◽

Supercooled Liquid ◽

Phase Evolution ◽

Supercooled Liquid Region ◽

Glassy Matrix ◽

Liquid Region ◽

The Matrix

Amorphous Ti66Nb13Cu8Ni6.8Al6.2 alloy powders with different tungsten carbide (WC) contents were synthesized by mechanical alloying. Outstanding differences in particle size, thermal stability, glass-forming ability, and phase evolution are found for the synthesized Ti-based glassy powders with different WC contents. This is attributed to the fact that the WC was partially alloyed into the glassy matrix and the matrix element Ti was also partially alloyed into the WC particles. The obtained glassy powders exhibit a wide supercooled liquid region above 64 K. Meanwhile, the main crystalline phase is the ductile β-Ti with a high volume fraction in the crystallized alloy powders. These two aspects offer the possibility of easily preparing a plasticity-enhanced bulk composite in the supercooled liquid region by powder metallurgy, which couples the nanosized WC particles with in situ precipitated ductile β-Ti phase.

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