On the subsurface deformation of two different Fe-based bulk metallic glasses indented by Vickers micro hardness

2014 ◽  
Vol 46 ◽  
pp. 118-125 ◽  
Author(s):  
Mohsen Askari-Paykani ◽  
Mahmoud Nili-Ahmadabadi ◽  
Amir Seiffodini
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Micro Hardness ◽  
Subsurface Deformation ◽  
Vickers Micro Hardness

Subsurface deformation during Vickers indentation of bulk metallic glasses

2004 ◽  
Vol 375-377 ◽  
pp. 1191-1195 ◽  
Author(s):  
S. Jana ◽  
U. Ramamurty ◽  
K. Chattopadhyay ◽  
Y. Kawamura
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Vickers Indentation ◽  
Subsurface Deformation

Hardness Indentation Studies On Metallic Glasses

2002 ◽  
Vol 754 ◽  
Author(s):  
Paul Wesseling ◽  
Peravudh Lowhaphandu ◽  
John. J. Lewandowski
Keyword(s):  
Metallic Glass ◽  
Test Temperature ◽  
Metallic Glasses ◽  
Room Temperature ◽  
Indentation Load ◽  
Amorphous Metals ◽  
Micro Hardness ◽  
Iron Based ◽  
Vickers Micro Hardness

ABSTRACTVickers micro-hardness indentations have been performed on a number of amorphous metals. The effects of changes in indentation load on the hardness and appearance of indents will be discussed for amorphous Al87Ni7Gd6. In addition, the effects of changes in test temperature on the micro-hardness and appearance of indentations in Vitreloy I are presented. A transition in deformation/flow character was detected with increasing test temperature for the Vitreloy I specimens. In addition, preliminary hardness data obtained at room temperature on an iron based metallic glass exhibited values in excess of 12 GPa without cracking.

High-strength Cu–Ti-rich bulk metallic glasses and nano-composites

2003 ◽  
Vol 94 (5) ◽  
pp. 615-620 ◽  
Author(s):  
Mariana Calin ◽  
Jürgen Eckert ◽  
Ludwig Schultz
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
High Strength ◽  
Nano Composites

Evaluation of the Resistance of Individual Si Die to Cracking

1998 ◽  
Author(s):  
R. Berriche ◽  
R.K. Lowry ◽  
M.I. Rosenfield
Keyword(s):  
Thermal Cycling ◽  
Hardness Test ◽  
Mechanical Stresses ◽  
Test Method ◽  
Processing Conditions ◽  
Micro Hardness ◽  
Test Methodology ◽  
Vickers Micro Hardness

Abstract The present work investigated the use of the Vickers micro-hardness test method to determine the resistance of individual die to cracking. The results are used as an indicator of resistance to failure under the thermal and mechanical stresses of packaging and subsequent thermal cycling. Indentation measurements on die back surfaces are used to determine how changes in wafer backside processing conditions affect cracks that form around impressions produced at different loads. Test methodology and results obtained at different processing conditions are discussed.

scholarly journals Tension-Tension Fatigue Behavior of High-Toughness Zr61Ti2Cu25Al12 Bulk Metallic Glass

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2815
Author(s):  
Yu Hang Yang ◽  
Jun Yi ◽  
Na Yang ◽  
Wen Liang ◽  
Hao Ran Huang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Shear Band ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Fatigue Resistance ◽  
Metallic Glasses ◽  
Stress Amplitude ◽  
Fatigue Behavior ◽  
Bulk Metallic Glasses ◽  
High Toughness

Bulk metallic glasses have application potential in engineering structures due to their exceptional strength and fracture toughness. Their fatigue resistance is very important for the application as well. We report the tension-tension fatigue damage behavior of a Zr61Ti2Cu25Al12 bulk metallic glass, which has the highest fracture toughness among BMGs. The Zr61Ti2Cu25Al12 glass exhibits a tension-tension fatigue endurance limit of 195 MPa, which is higher than that of high-toughness steels. The fracture morphology of the specimens depends on the applied stress amplitude. We found flocks of shear bands, which were perpendicular to the loading direction, on the surface of the fatigue test specimens with stress amplitude higher than the fatigue limit of the glass. The fatigue cracking of the glass initiated from a shear band in a shear band flock. Our work demonstrated that the Zr61Ti2Cu25Al12 glass is a competitive structural material and shed light on improving the fatigue resistance of bulk metallic glasses.

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