Synthesis of Ni-based bulk metallic glass matrix composites containing ductile brass phase by warm extrusion of gas atomized powders

To prevent catastrophic failure by propagating highly localized shear bands and to overcome the limited dimension of metallic glass, centimeter-scale Ni59Zr20Ti16Si2Sn3 bulk metallic glass matrix composites were fabricated by warm extrusion of a mixture of gas-atomized fully amorphous powders and ductile brass powders. After consolidation, the composite retained the fully amorphous matrix found in the gas-atomized powder combined with the brass second phase. The glass-transition and crystallization temperatures of the extruded material were the same as those of the starting powders. The confined ductile brass phase enabled the bulk metallic glass matrix composites to deform plastically under uniaxial compression at room temperature. The combination of strength and ductility in the inherently brittle Ni-based monolithic materials could be obtained by introducing a ductile phase in the bulk metallic glass matrix. However, control of the volume fraction and distribution of the ductile brass phase was important for the proper combination of the strength and plasticity.

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An Analytical Method for Studying the Stress-Strain Relations of Bulk Metallic Glass Matrix Composites under Tension

Advanced Composites Letters ◽

10.1177/096369351802700603 ◽

2018 ◽

Vol 27 (6) ◽

pp. 096369351802700

Author(s):

Yunpeng Jiang

Keyword(s):

Metallic Glass ◽

Bulk Metallic Glass ◽

Analytical Method ◽

Glass Matrix ◽

Shear Bands ◽

Matrix Composites ◽

Stress Strain ◽

Glass Matrix Composites ◽

Softening Stage

In this contribution, an analytical model was formulated to predict the tensile stress-strain relations of bulk metallic glass matrix composites (BMGCs) based on Weng's theoretical frame for dual-ductile composites. For in-situ BMGCs, BMG matrix also exhibits the elastic-plastic deform response as well as the dendrite phases during the stretching. The shear bands are regarded as Mode-I cracks, and whereby the strain-softening stage in the stress-strain curves can be well reflected. Furthermore, multi-particle representative volume element based FEM modelling was employed to clearly explain the failure mechanisms in BMGCs as a necessary complement. The predictions are in reasonable agreement with the experimental results. The presented analytical method will shed some light on optimizing the microstructures, and is of convenience in the engineering applications.

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Deformation Behavior of Ni-Based Metallic Glass Matrix Composites Reinforced by Brass Short-Fibers Synthesized by Warm Extrusion of Powders

Materials Science Forum ◽

10.4028/www.scientific.net/msf.449-452.937 ◽

2004 ◽

Vol 449-452 ◽

pp. 937-940 ◽

Cited By ~ 1

Author(s):

Dal Hee Bae ◽

Myung Hyun Lee ◽

D.H. Kim

Keyword(s):

Metallic Glass ◽

Deformation Behavior ◽

Glass Matrix ◽

Shear Bands ◽

Matrix Composites ◽

Short Fibers ◽

Macroscopic Plasticity ◽

Glass Matrix Composites ◽

Compression Condition ◽

Warm Extrusion

Deformation behavior of Ni-based metallic glass matrix composites reinforced by short brass-fibers, synthesized by warm extrusion of gas atomized powders, has been investigated under the uniaxial compression condition at room temperature. The brass-fibers are well distributed in the metallic glass matrix and enhanced macroscopic plasticity is observed due to the formation of multiple shear bands, initiated from the interface between brass-fiber and metallic glass matrix, as well as their confinement between the brass-fibers, stemming from the constrained plastic deformation of the reinforcing brass phase.

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Nanocrystallization at shear bands in bulk metallic glass matrix composites

Scripta Materialia ◽

10.1016/j.scriptamat.2007.11.032 ◽

2008 ◽

Vol 58 (8) ◽

pp. 651-654 ◽

Cited By ~ 16

Author(s):

Min Ha Lee ◽

Dong Hyun Bae ◽

Do Hyang Kim ◽

Won Tae Kim ◽

Daniel J. Sordelet ◽

...

Keyword(s):

Metallic Glass ◽

Bulk Metallic Glass ◽

Glass Matrix ◽

Shear Bands ◽

Matrix Composites ◽

Glass Matrix Composites

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Development of Bulk Metallic Glass Matrix Composites (BMGMC) by Additive Manufacturing: Modelling and Simulation – A Review: Part A

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1154.1 ◽

2019 ◽

Vol 1154 ◽

pp. 1-39

Author(s):

Muhammad Musaddique Ali Rafique ◽

Stephen Niezgoda ◽

Milan Brandt

Keyword(s):

Additive Manufacturing ◽

Metallic Glass ◽

Bulk Metallic Glass ◽

Glass Matrix ◽

Structural Engineering ◽

Nucleation And Growth ◽

Modelling And Simulation ◽

Matrix Composites ◽

Ductile Phase ◽

Glass Matrix Composites

Bulk metallic glasses (BMGs) and their composites (BMGMC) have emerged as competitive materials for structural engineering applications exhibiting superior tensile strength, hardness along with very high elastic strain limit. However, they suffer from a lack of ductility and subsequent low toughness due to the inherent brittleness of the glassy structure which render them to failure without appreciable yielding owing to mechanisms of rapid movement of shear bands all throughout the volume of the material. This severely limits their use in fabricating structural and machinery parts. Various mechanisms have been proposed to counter this effect. Introduction of secondary ductile phase in the form of in-situ nucleating and growing dendrites from melt during solidification have proved out to be best solution of this problem. Nucleation and growth of these ductile phases have been extensively studied over the last 16 years since their introduction for the first time in Zr-based BMGMC by Prof. Johnson at Caltech. Data about almost all types of phases appearing in different systems have been successfully reported. However, there is very little information available about the precise mechanism underlying their nucleation and growth during solidification in a copper mould during conventional vacuum casting and melt pool of additively manufactured parts. Various routes have been proposed to study this including experiments in microgravity, levitation in synchrotron light and modelling and simulation. In this report consisting of two parts which is a preamble of author’s PhD Project, a concise review about evolution of microstructure in BMGMC during additive manufacturing have been presented with the aim to address fundamental problem of lack in ductility along with prediction of grain size and phase evolution with the help of advanced modelling and simulation techniques. It has been systematically proposed that 2 and 3 dimensional cellular automaton method combined with finite element (CAFE) tools programmed on MATLAB® and simulated on Ansys® would best be able to describe this phenomenon in most efficient way. Present part consists of general introduction of bulk metallic glass matrix composites (BMGMC), problem of lack of ductility in them, measures to counter it, success stories and their additive manufacturing.

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Mechanical Properties of Metallic Glass Matrix Composites Synthesized by Powder Consolidation as Precursor of Porous Material

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.152-154.643 ◽

2012 ◽

Vol 152-154 ◽

pp. 643-646

Author(s):

Min Ha Lee ◽

Bum Sung Kim

Keyword(s):

Mechanical Properties ◽

Metallic Glass ◽

Glass Matrix ◽

Shear Bands ◽

Matrix Composites ◽

Ductile Phase ◽

Powder Consolidation ◽

Macroscopic Plasticity ◽

Glass Matrix Composites ◽

Compression Condition

Mechanical properties of Cu-based metallic glass matrix composites reinforced by ductile fugitive phases, synthesized by warm extrusion of gas atomized powders, has been investigated under the uniaxial compression condition at room temperature. The ductile fugitive phases are well distributed in the metallic glass matrix and enhanced macroscopic plasticity is observed due to the formation of multiple shear bands, initiated from the interface between ductile fugitive phase and metallic glass matrix, as well as their confinement between the reinforcements, stemming from the constrained plastic deformation of the reinforcing ductile phase.

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Quasi-static and dynamic deformation behaviors of in situ Zr-based bulk-metallic-glass-matrix composites

Journal of Materials Research ◽

10.1557/jmr.2010.0289 ◽

2010 ◽

Vol 25 (12) ◽

pp. 2264-2270 ◽

Cited By ~ 23

Author(s):

J.W. Qiao ◽

P. Feng ◽

Y. Zhang ◽

Q.M. Zhang ◽

P.K. Liaw ◽

...

Keyword(s):

Mechanical Properties ◽

Metallic Glass ◽

Bulk Metallic Glass ◽

Glass Matrix ◽

Dynamic Deformation ◽

Shear Bands ◽

Matrix Composites ◽

Deformation Behaviors ◽

Glass Matrix Composites

Quasi-static and dynamic deformation behaviors of Zr-based bulk-metallic-glass-matrix composites, fabricated by Bridgman solidification, were investigated in this study. Upon quasi-static compressive loading, the composites exhibit ultrahigh strength, accompanied by considerable plasticity. The multiplication of shear bands on the lateral surface of deformed samples, and the highly-dense liquid drops on the fracture surface, are in agreement with the improved plasticity. However, upon dynamic loading, the mechanical properties of the composites deteriorate considerably, due to insufficient time to form profuse shear bands. The strain-rate responses of the mechanical properties of the crystalline alloys and the in situ and ex situ bulk metallic glass composites are compared, and the different deformation mechanisms of the in situ composites upon quasi-static and dynamic loading are explained.

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