Phase separation and significant plastic strain in a Zr–Cu–Ni–Al–Fe bulk metallic glass

2016 ◽  
Vol 656 ◽  
pp. 84-89 ◽  
Author(s):  
Shuangshuang Chen ◽  
Jianxin Tu ◽  
Jiajia Wu ◽  
Qiang Hu ◽  
Shenghui Xie ◽  
...  
Keyword(s):  
Phase Separation ◽  
Plastic Strain ◽  
Metallic Glass ◽  
Bulk Metallic Glass

Microstructure evolution of bulk metallic glass during thermal oxidation under plastic strain

2019 ◽  
Vol 147 ◽  
pp. 192-200 ◽  
Author(s):  
Mao Zhang ◽  
Jiacheng Zhang ◽  
Lei Deng ◽  
Qiaomin Li ◽  
Junsong Jin ◽  
...  
Keyword(s):  
Plastic Strain ◽  
Metallic Glass ◽  
Thermal Oxidation ◽  
Bulk Metallic Glass ◽  
Microstructure Evolution

Phase separation in Cu43Zr43Al7Ag7 bulk metallic glass

2005 ◽  
Vol 53 (2) ◽  
pp. 165-169 ◽  
Author(s):  
J.C. Oh ◽  
T. Ohkubo ◽  
Y.C. Kim ◽  
E. Fleury ◽  
K. Hono
Keyword(s):  
Phase Separation ◽  
Metallic Glass ◽  
Bulk Metallic Glass

Geometry-sensitive plasticity of a monolithic bulk metallic glass

2007 ◽  
Vol 1048 ◽  
Author(s):  
WenFei Wu ◽  
Yi Li
Keyword(s):  
Aspect Ratio ◽  
Plastic Strain ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
New Method ◽  
Catastrophic Failure ◽  
Sample Geometry ◽  
Glassy Alloys ◽  
Geometry Dependence ◽  
Orthogonal Geometry

AbstractWe report a strong geometry-dependence of compressive plasticity in a Zr-based bulk metallic glass (BMG). With a standard orthogonal geometry, the Zr-based BMG typically fractured at a plastic strain less than 2%. However, by modifying the sample geometry while maintaining the sample aspect ratio, a large apparent compressive plastic strain over 10% was achieved consistently. These results present a new method on arresting the catastrophic failure of the glassy alloys and offer ways for BMGs in engineering applications.

Free Volume Evolution in Bulk Metallic Glass during High Temperature Creep

2002 ◽  
Vol 754 ◽  
Author(s):  
B. S. Sundar Daniel ◽  
Martin Heilmaier ◽  
Birgit Bartusch ◽  
Jörn Kanzow ◽  
Katja Günther-Schade ◽  
...  
Keyword(s):  
Glass Transition ◽  
Plastic Strain ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Free Volume ◽  
Metallic Glasses ◽  
Constant Strain Rate ◽  
Dsc Analysis ◽  
Scanning Calorimetry ◽  
Positron Lifetime Spectroscopy

ABSTRACTMetallic glasses lack long-range translational symmetry and have excess volume trapped within their amorphous structure, which has a direct bearing on their physical properties including deformation characteristics. Moreover, the trapped excess free volume is directly correlated to the defect concentration facilitating the possibility to model the temperature and time dependence of the free volume changes during creep as a trade off between defect generation and annihilation. Using differential scanning calorimetry (DSC) analysis the residual free volume of a metallic glass can be characterised based on the glass transition peak height (Δcp). In the present work constant strain rate tests were carried out at the ‘onset’ (Tgon = 685 K) and ‘point of inflection’ (Tgp = 705 K) of the calorimetric glass transition to study the time dependent flow behaviour in Zr55Cu30Al10Ni5 bulk metallic glass. Modelling based on DSC analysis and positron lifetime spectroscopy on samples creep deformed to different plastic strain values corroborate the stress decrease after the peak stress (‘stress overshoot’) occurring in bulk metallic glasses with increasing plastic strain to be associated with a small increase in free volume.

Analysis of Nano-Scale Phase Separation in a Pd40Ni40P20 Bulk Metallic Glass Deformed in the Supercooled Liquid Region by HREM and Nano-Diffraction

2004 ◽  
Vol 10 (S02) ◽  
pp. 790-791
Author(s):  
Jin Guo Wang ◽  
T. G. Nieh
Keyword(s):  
Phase Separation ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Supercooled Liquid ◽  
Supercooled Liquid Region ◽  
Liquid Region ◽  
Nano Scale

Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.

Amorphous phase separation in an Fe-based bulk metallic glass

2017 ◽  
Vol 190 ◽  
pp. 161-164 ◽  
Author(s):  
Wei Guo ◽  
Pyuck-Pa Choi ◽  
Jae-Bok Seol
Keyword(s):  
Phase Separation ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Amorphous Phase
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