Influence of the Glass Transition and Crystallization on the Internal Friction of some Metallic Glasses*

1988 ◽  
Vol 156 (Part_1) ◽  
pp. 115-121 ◽  
Author(s):  
Hans-Rainer Sinning ◽  
Frank Haeßner
Keyword(s):  
Glass Transition ◽  
Internal Friction ◽  
Metallic Glasses

FLUCTUATION OF INTERNAL FRICTION IN METALLIC GLASSES

2011 ◽  
Vol 1300 ◽  
Author(s):  
Y. Miyauchi ◽  
R. Tamura ◽  
Y. Hiki
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Internal Friction ◽  
Metallic Glass ◽  
Transition Region ◽  
Frequency Spectrum ◽  
Metallic Glasses ◽  
Glass Transition Region ◽  
Characteristic Peak

AbstractInternal friction (IF) of a metallic glass Zr55Cu30Al10Ni5 has been measured near the glass transition temperature Tg (= 666 K). The measurement is performed by using DMA (TA Instrument) apparatus at a frequency of 0.01 Hz for a specimen stabilized by annealing. The specimen is kept at a constant temperature T, and the IF value Q-1 is measured as a function of time t. A fluctuation of Q-1 with time is seen, and the magnitude of the fluctuation, F(t), is derived from the Q-1-vs-t data. F(t) is Fourier transformed to the frequency spectrum F(f). Such experiment and analyses are carried out at various temperatures near Tg. A characteristic peak (f ~ 10-3 Hz) is found in the spectrum F(f) in the glass transition region.

scholarly journals On Glass Forming Ability of Bulk Metallic Glasses by Relating the Internal Friction Peak Value

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 767
Author(s):  
Xianfeng Zhang ◽  
Xiao Cui ◽  
Zhuotong Du ◽  
Fangqiu Zu ◽  
Jinjing Li ◽  
...  
Keyword(s):  
Internal Friction ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Liquid Region ◽  
Internal Friction Peak ◽  
Glass Forming ◽  
Constituent Elements ◽  
Valid Criterion ◽  
Peak Value

The internal friction (IF) behaviors of a series of LaCe-, Zr-, and La-based bulk metallic glasses (BMGs) were studied by a computer-controlled, conventional inverted torsion pendulum. The results indicate that with an increasing temperature, the IF also increases gradually in the supercooled liquid region, followed by a decrease caused by crystallization. BMGs with a good glass forming ability (GFA) usually possess a high IF peak value for an alloy system with the same constituent elements. Furthermore, the magnitude of the IF value (Qi−1) of the inflection point is an efficient criterion of GFA. The Qi−1 value is a valid criterion under the conditions of identical constituent elements and different element contents. However, Qi−1 and GFA have no relationship among different alloy systems.

Thermal behavior and glass transition of Zr-based bulk metallic glasses

2004 ◽  
Vol 375-377 ◽  
pp. 351-354 ◽  
Author(s):  
N. Mattern ◽  
U. Kühn ◽  
H. Hermann ◽  
S. Roth ◽  
H. Vinzelberg ◽  
...  
Keyword(s):  
Glass Transition ◽  
Thermal Behavior ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses

Reverse Plasticity in Nanoindentation

2007 ◽  
Vol 1049 ◽  
Author(s):  
Yongjiang Huang ◽  
Nursiani Indah Tjahyono ◽  
Jun Shen ◽  
Yu Lung Chiu
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Glass Transition ◽  
Single Crystal ◽  
Metallic Glasses ◽  
Deformation Mechanisms ◽  
Glass Transition Temperatures ◽  
Loading Rates ◽  
Nanoindentation Experiment ◽  
Properties Of Materials

AbstractThis paper summarises our recent cyclic nanoindentation experiment studies on a range of materials including single crystal and nanocrystalline copper, single crystal aluminium and bulk metallic glasses with different glass transition temperatures. The unloading and reloading processes of the nanoindentation curves have been analysed. The reverse plasticity will be discussed in the context of plastic deformation mechanisms involved. The effect of loading rates on the mechanical properties of materials upon cyclic loading will also be discussed.

scholarly journals Effects of Atomic Deviatoric Distortion on Local Glass Transition of Metallic Glasses

2005 ◽  
Vol 46 (12) ◽  
pp. 2848-2855 ◽  
Author(s):  
Junyoung Park ◽  
Yoji Shibutani ◽  
Shigenobu Ogata ◽  
Masato Wakeda
Keyword(s):  
Glass Transition ◽  
Metallic Glasses
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