Effect of cold rolling on the pressure coefficient of glass transition temperature in bulk metallic glasses

2021 ◽  
Vol 706 ◽  
pp. 179071
Author(s):  
Parijat P. Jana ◽  
Jürgen Eckert ◽  
Jayanta Das
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Cold Rolling ◽  
Metallic Glasses ◽  
Pressure Coefficient ◽  
Bulk Metallic Glasses

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.

Preparation and Mechanical Properties of Hafnium-based Bulk Metallic Glasses

2000 ◽  
Vol 644 ◽  
Author(s):  
Xiaofeng Gu ◽  
Li-qian Xing ◽  
T. C. Hufnagel
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Strain Rates ◽  
Casting Method ◽  
Glass Forming ◽  
Arc Melting ◽  
Potential Use

AbstractWe have prepared bulk metallic glasses of composition (HfxZr1-x)52.5Cu17.9Ni14.6Al10Ti5 (with x=0-1) by an arc melting/suction casting method. The density of these alloys increases by nearly 67% with increasing Hf content, which is advantageous for their potential use as kinetic energy armor-piercing projectile materials. The glass transition temperature and the melting temperature increase linearly with increasing Hf content. The reduced glass transition temperature (Tg/Tm) decreases from 0.64 (x=0) to 0.62 (x=1), indicating reduced glass-forming ability for the Hf- based alloy. The fracture strength in uniaxial compression at quasi-static strain rates also increases with increasing Hf content, reaching ∼ 2.2 GPa for Hf52.5Cu17.9Ni14.6Al10Ti5.

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