Effect of cryogenic treatment on microstructure and mechanical properties of Cu<sub>40</sub>Zr<sub>44</sub>Ag<sub>8</sub>Al<sub>8</sub> bulk metallic glass composite

2012 ◽  
Vol 42 (6) ◽  
pp. 577-582
Author(s):  
Yong LIU ◽  
ChunShui XU ◽  
Li ZHANG ◽  
XiangJie YANG
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Cryogenic Treatment ◽  
Glass Composite ◽  
Microstructure And Mechanical Properties ◽  
Bulk Metallic Glass Composite

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.

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