Mg-based bulk metallic glasses: Elastic properties and their correlations with toughness and glass transition temperature

2011 ◽  
Vol 26 (7) ◽  
pp. 923-933 ◽  
Author(s):  
Shao-Gang Wang ◽  
Ling-Ling Shi ◽  
Jian Xu
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Elastic Properties ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Image Position

Abstract

Fe-based bulk metallic glasses with diameter thickness larger than one centimeter

2004 ◽  
Vol 19 (5) ◽  
pp. 1320-1323 ◽  
Author(s):  
V. Ponnambalam ◽  
S. Joseph Poon ◽  
Gary J. Shiflet
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glasses ◽  
Crystalline Phase ◽  
Elastic Moduli ◽  
Bulk Metallic Glasses ◽  
Maximum Diameter ◽  
Fluxing Agent

Fe–Cr–Mo–(Y,Ln)–C–B bulk metallic glasses (Ln are lanthanides) with maximum diameter thicknesses reaching 12 mm have been obtained by casting. The high glass formability is attained despite a low reduced glass transition temperature of 0.58. The inclusion of Y/Ln is motivated by the idea that elements with large atomic sizes can destabilize the competing crystalline phase, enabling the amorphous phase to be formed. It is found that the role of Y/Ln as a fluxing agent is relatively small in terms of glass formability enhancement. The obtained bulk metallic glasses are non-ferromagnetic and exhibit high elastic moduli of approximately 180–200 GPa and microhardness of approximately 13 GPa.

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