scholarly journals Effect of Sample-Size on the Compression Deformation Behavior of a CuZr-Based Bulk Metallic Glass Composite

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 857
Author(s):  
Yongsheng Chen ◽  
Weizhong Liang ◽  
Longxing Wang ◽  
Kai Qi ◽  
Yang Wang ◽  
...  
Keyword(s):  
Yield Strength ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Deformation Behavior ◽  
Glassy Matrix ◽  
Glass Composite ◽  
Glass Composites ◽  
Bulk Metallic Glass Composites ◽  
Deformation Behaviors ◽  
Bulk Metallic Glass Composite

The compressive deformation behaviors and microstructures of Cu45Zr48Al4Nb3 bulk metallic glass composites with diameters of 3, 2, and 1 mm were investigated systematically. It was found that the smallest sample showed the highest yield strength and compressive plasticity. The yield strength of the samples was found to depend on the fraction of their crystalline phases in the glassy matrix. The smaller samples showed larger free volumes, which is favorable for plastic deformation. The deformation behavior of the samples was found to depend on their size. The results obtained in this study will be helpful for investigating the mechanical behavior of metallic glass composites.

scholarly journals Improvement the Plasticity via Dual-Amorphous and Nanocrystals Synergistically in a Zr-Cu-Al-Nb Bulk Metallic Glass Composite

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1158
Author(s):  
Tuo Wang ◽  
Xiaohui Yang ◽  
Qiang Li ◽  
Chuntao Chang
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Underlying Mechanism ◽  
Glass Composite ◽  
Glass Composites ◽  
Bulk Metallic Glass Composites ◽  
First Time ◽  
Bulk Metallic Glass Composite

In this work, a small amount of Nb has been added in a Zr52Cu42.5Al5.5 bulk metallic glass, and a Zr52Cu42Al5.5Nb0.5 bulk metallic glass composite with dual-amorphous and nanocrystal structures has been developed for the first time. This in situ formed bulk metallic glass composite has a larger room compressive plasticity of above 13% than that of the Zr52Cu42.5Al5.5 bulk metallic glass. The excellent plasticity of the bulk metallic glass composite is attributed to the phase-separated matrix with micro-nanocrystal and the nanocrystallization during the deforming process. This work may give a new sight into design bulk metallic glass composites and the underlying mechanism for deformation.

Formation, microstructure, and mechanical properties of in situ Mg–Ni–(Gd,Nd) bulk metallic glass composite

2009 ◽  
Vol 24 (12) ◽  
pp. 3603-3610 ◽  
Author(s):  
Jian Yin ◽  
Guangyin Yuan ◽  
Zhenhua Chu ◽  
Jian Zhang ◽  
W.J. Ding
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Hexagonal Lattice ◽  
Shear Bands ◽  
Glassy Matrix ◽  
Glass Composite ◽  
Specific Strength ◽  
Periodic Arrays ◽  
Bulk Metallic Glass Composite

Based on a ternary Mg75Ni15Gd10 metallic glass former, a new Mg80Ni12Gd4Nd4 bulk metallic glass composite (BMGC) was developed by tailoring the compositions of Mg and rare earth (RE) elements. This BMGC displayed compressive ultimate strength over 900 MPa with a total strain to failure of 4.3% and specific strength of 3.12 × 105 Nm/kg. The improved mechanical properties were attributed to a “dual phases” structure consisting of Mg solid solution flakes and glassy matrix in the Mg80Ni12Gd4Nd4 BMGC. The homogeneously dispersed Mg phases reinforcement in the BMGC were characterized as a long period ordered structure (LPOS) with periodic arrays of six close-packed planes distorted from the ideal hexagonal lattice of 6H-type. The LPOS-Mg in the composite can act as a soft media to trap or interact with the unstable shear bands and contribute to plastic strain. The present study may provide a guideline for designing the Mg–TM–RE-based (TM: transition metals) BMGCs with “dual phases” structures.

Effect of Carbon-Nanotube Addition on Thermal Stability of Ti-Based Metallic Glass Composites

2007 ◽  
Vol 534-536 ◽  
pp. 865-868 ◽  
Author(s):  
Chih Feng Hsu ◽  
Pee Yew Lee
Keyword(s):  
Thermal Stability ◽  
Carbon Nanotube ◽  
Metallic Glass ◽  
Glassy Matrix ◽  
Glass Composite ◽  
Composite Powders ◽  
Glass Composites ◽  
Hardness Increase ◽  
Thermal Stability Of ◽  
Bulk Metallic Glass Composite

The preparation of Ti50Cu28Ni15Sn7 metallic glass composite powders was accomplished by the mechanical alloying of a pure Ti, Cu, Ni, Sn and carbon nanotube (CNT) powder mixture after 8 h milling. In the ball-milled composites, the initial CNT particles were dissolved in the Ti-based alloy glassy matrix. The thermal stability of the amorphous matrix is affected by the presence of the CNT particles. Changes in Tg and Tx suggest deviations in the chemical composition of the glassy matrix due to a partial dissolution of the CNT species in the amorphous phase. The bulk metallic glass composite was successfully prepared by vacuum hot pressing the as-milled CNT/ Ti50Cu28Ni15Sn7 metallic glass composite powders. A significant hardness increase with the CNT additions was observed for the consolidated composite compacts.

Formation and Mechanical Properties of Mg-Cu-Al-Gd Bulk Metallic Glass Composites

2010 ◽  
Vol 650 ◽  
pp. 290-294
Author(s):  
Yi Ming Wang ◽  
Li Jing Zheng ◽  
Shu Jie Pang
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Glassy Alloy ◽  
Glassy Matrix ◽  
Crystalline Phases ◽  
Glass Composites ◽  
Al Content ◽  
Bulk Metallic Glass Composites ◽  
Mold Casting

The effect of Al addition to Mg65Cu25Gd10 glassy alloy on the microstructure, thermal properties and mechanical properties were investigated. The Mg65Cu25-xAlxGd10 (x=1-7at. %) bulk metallic glass composites were formed by copper mold casting, and the fraction and size of the crystalline phases in the glassy matrix changed with the Al content. The Mg65Cu24Al1Gd10 glass composite consisted of a small amount of crystalline phases in the glassy matrix possesses high compressive strength up to about 850 MPa.

Deformation behavior of Ta wire-reinforced Zr-based bulk metallic glass composites

2018 ◽  
Vol 25 (6) ◽  
pp. 601-607 ◽  
Author(s):  
Sen Chen ◽  
Hua-meng Fu ◽  
Zheng-kun Li ◽  
Long Zhang ◽  
Hong-wei Zhang ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Deformation Behavior ◽  
Glass Composites ◽  
Bulk Metallic Glass Composites
Sign in / Sign up

Export Citation Format

Share Document