Based on internal friction theory: Investigating of Fe-based bulk amorphous alloys on mechanical properties with different Si content

2021 ◽  
Vol 563 ◽  
pp. 120813
Author(s):  
Ruiping Li ◽  
Qingjun Chen ◽  
Li Ji ◽  
Xinyuan Peng ◽  
Guosheng Huang
Keyword(s):  
Mechanical Properties ◽  
Internal Friction ◽  
Amorphous Alloys ◽  
Bulk Amorphous Alloys ◽  
Friction Theory ◽  
Si Content

Synthesis and mechanical properties of Zr-based bulk amorphous alloys

2008 ◽  
Vol 354 (28) ◽  
pp. 3291-3298 ◽  
Author(s):  
M. Iqbal ◽  
J.I. Akhter ◽  
H.F. Zhang ◽  
Z.Q. Hu
Keyword(s):  
Mechanical Properties ◽  
Amorphous Alloys ◽  
Bulk Amorphous Alloys

Mechanical Properties of La-based Bulk Amorphous Alloys and Composites

2002 ◽  
Vol 754 ◽  
Author(s):  
M.L. Lee ◽  
Y. Li ◽  
W.C. Carter
Keyword(s):  
Mechanical Properties ◽  
Fracture Energy ◽  
Amorphous Alloys ◽  
High Volume ◽  
Intermetallic Phases ◽  
Impact Fracture ◽  
Crystalline Phases ◽  
Bulk Amorphous Alloys ◽  
Glassy Metals ◽  
The Impact

ABSTRACTThe influence of different microstructures of La-based fully amorphous samples and its composites on the impact fracture energy were investigated and discussed. Results showed improvement in fracture energy of glassy metals with intermetallic phases, but deteriorated in the presence of dendrite phases and high volume % of crystalline phases.

Structure, Annealing Characteristics and Mechanical Properties of Mg60Cu30-yY10Siy Bulk Amorphous Alloys

2002 ◽  
Vol 754 ◽  
Author(s):  
U. Wolff ◽  
B. Yang ◽  
N. Pryds ◽  
J.A. Wert
Keyword(s):  
Mechanical Properties ◽  
Amorphous Alloys ◽  
Simple Technique ◽  
Partial Substitution ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Glass Forming ◽  
Si Content ◽  
Constant Heating

ABSTRACTThe effect of different Si contents on the glass forming ability (GFA) and the amorphous-to-crystalline transformation has been investigated for the Mg-Cu-Y-Si system. Four Mg60Cu30-yY10Siy (y = 1–5 at.%) alloys were prepared using a relatively simple technique of rapid cooling of the melt in a copper mould. Crystallization was induced by heat treatment of the alloys and the samples were then characterized concerning their microstructure and thermal stability by X-ray diffraction (XRD), optical (OM) and scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) at a constant heating rate. Partial substitution of Cu by Si leads to a transition of the as-cast structure at a constant cooling rate from amorphous to crystalline with increasing Si content. Furthermore, the glass transition temperature (Tg) of the Mg-Cu-Y-Si alloy is lower compared to the Mg-Cu-Y system. The mechanical properties of the bulk Mg-Cu-Y-Si alloys have been investigated and found to vary with the Si content.

scholarly journals Effect of Intermittent Ultrasonic Vibration-Assisted Compression on the Mechanical Properties of Zr-Based Amorphous Alloys

2021 ◽  
Vol 8 ◽  
Author(s):  
Yang Lingyun ◽  
Xu Shenpeng ◽  
Lou Yan
Keyword(s):  
Mechanical Properties ◽  
Shear Zone ◽  
Free Volume ◽  
Ultrasonic Vibration ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
High Ductility ◽  
Bulk Amorphous Alloys ◽  
Vibration Stress ◽  
Design Experiments

Bulk amorphous alloys have some good mechanical properties due to their special atomic arrangement and are now popular in the field of materials. Zr-based amorphous alloys have good mechanical properties, but they are different from lattice slip materials with high ductility. When these materials are compressed and deformed, it generates a concentrated elastic force in the shear zone that causes instantaneous amorphous fracture. The extremely poor plasticity of Zr-based amorphous materials highlight their shortcomings and make them difficult to use in engineering applications. In this paper, it is found that the plasticity of Zr-based amorphous alloys is enhanced to a certain extent by intermittent ultrasonic vibration-assisted compression (IUVC). The ultrasonic vibration stress of IUVC can increase the extra free volume of Zr-based amorphous alloys and increase their degree of “rejuvenation”, which is manifested as an increase in plasticity. To explore how IUVC affects the plasticity of Zr-based amorphous alloys, we design experiments to analyse the effects of different intermittent times, pre-pressures and ultrasonic amplitudes on the plasticity of amorphous alloys.

Influence of Y and Nb Addition on Crystallization Behavior and Mechanical Properties of Zr-Ni-Al-Cu-M Bulk Amorphous Alloys

2011 ◽  
Vol 326 ◽  
pp. 11-18 ◽  
Author(s):  
Muhammad Iqbal ◽  
Javed Iqbal Akhter
Keyword(s):  
Mechanical Properties ◽  
Activation Energy ◽  
Amorphous Alloys ◽  
Crystallization Behavior ◽  
Liquid Region ◽  
Mechanical And Thermal Properties ◽  
Bulk Amorphous Alloys ◽  
Wide Range ◽  
Stage Crystallization ◽  
Nb Addition

Bulk amorphous alloys are new class of materials with excellent mechanical and thermal properties. Bulk metallic glasses (BMGs) have wide range of application such as structural materials. Minor alloying additions play beneficial role in the production and properties of BMGs. The present study was conducted to investigate the effect of Y and Nb addition on activation energy, crystallization behavior, thermal and mechanical properties of Zr64.5Ni15.5Al11.5Cu8.5. Bulk amorphous ingots and sheets of three [Zr0.645Ni0.155Al0.115Cu0.085]100-xM2 (M = Y and Nb and x = 0, 2 at. %) alloys were produced by Cu mold casting technique. The alloys were characterized by XRD, DSC, SEM, FESEM and EDS. Activation energies were calculated. The alloy containing Y shows single stage crystallization while Nb addition shows double stage crystallization. The maximum activation energy calculated is 300 kJ/mol. Parameters describing thermal stability in these systems were determined from DSC data which improved as a result of these additives. Reduced glass transition temperature Trg and thermal parameters like g, d and b were improved by Y addition. The supercooled liquid region varies between 87-100 K. Hardness and elastic moduli were also improved. It was concluded that Y and Nb addition has beneficial effect on mechanical properties. Three phases NiZr2 and CuZr2 and Cu10Zr7 were identified by XRD and confirmed by EDS in the samples annealed at 823 K while the AlNiY ternary phase was detected in the alloy containing Y.

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