In-situ synthesis and mechanical properties of Zr-based bulk metallic glass matrix composites manipulated by nitrogen additions

2017 ◽  
Vol 91 ◽  
pp. 70-77 ◽  
Author(s):  
J.I. Lee ◽  
S.Y. Kim ◽  
E.S. Park
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Glass Matrix ◽  
In Situ Synthesis ◽  
Matrix Composites ◽  
Glass Matrix Composites ◽  
Nitrogen Additions

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

2010 ◽  
Vol 25 (12) ◽  
pp. 2264-2270 ◽  
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.

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

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.

Deformation of In-Situ-Reinforced Bulk Metallic Glass Matrix Composites

2002 ◽  
Vol 404-407 ◽  
pp. 553-560 ◽  
Author(s):  
Bjørn Clausen ◽  
S.Y. Lee ◽  
Ersan Üstündag ◽  
Choong Nyun Paul Kim ◽  
Donald W. Brown ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Glass Matrix ◽  
Matrix Composites ◽  
Glass Matrix Composites
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