Room Temperature Plasticity of Zr65Al7.5Ni10Cu17.5-xPdx Bulk Metallic Glasses

2007 ◽  
Vol 539-543 ◽  
pp. 2054-2058 ◽  
Author(s):  
Kyosuke Yoshimi ◽  
Hidemi Kato ◽  
Junji Saida ◽  
Akihisa Inoue
Keyword(s):  
Structural Change ◽  
Fracture Surface ◽  
Viscous Flow ◽  
Metallic Glasses ◽  
Room Temperature ◽  
Bulk Metallic Glasses ◽  
Plastic Behavior ◽  
Large Plastic Strain ◽  
X Ray ◽  
Flow Deformation

Monolithic Zr65Al7.5Ni10Pd17.5 and Zr65Al7.5Ni10Cu17.5 hardly had plastic deformability in tension at room temperature, although Zr65Al7.5Ni10Pd17.5 showed a large plastic strain in compression. A depressed zone that is the evidence of viscous flow deformation (so-called viscous flow depression zone; VFD-zone) was observed for Zr65Al7.5Ni10Pd17.5 around the edge at the point of failure on its specimen surfaces. However, no VFD-zone was seen for Zr65Al7.5Ni10Cu17.5. Thus, a clear difference in tensile plastic behavior was found between Zr65Al7.5Ni10Pd17.5 and Zr65Al7.5Ni10Cu17.5. A structural change in the vicinity of the fracture surface of Zr65Al7.5Ni10Pd17.5 was measured by micro-beam X-ray diffractometry (MB-XRD). We may be able to discuss the room temperature plasticity of Zr65Al7.5Ni10Cu17.5-xPdx bulk metallic glasses correlating with the phase stability of the amorphous and icosahedral quasi-crystalline phases.

scholarly journals Inverse Design of Fe-Based Bulk Metallic Glasses Using Machine Learning

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 729
Author(s):  
Junhyub Jeon ◽  
Namhyuk Seo ◽  
Hwi-Jun Kim ◽  
Min-Ha Lee ◽  
Hyun-Kyu Lim ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Metallic Glasses ◽  
Alloy Composition ◽  
Relevant Literature ◽  
Bulk Metallic Glasses ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ann Models ◽  
Wide Scale ◽  
Artificial Neural Network Ann

Fe-based bulk metallic glasses (BMGs) are a unique class of materials that are attracting attention in a wide variety of applications owing to their physical properties. Several studies have investigated and designed the relationships between alloy composition and thermal properties of BMGs using an artificial neural network (ANN). The limitation of the wide-scale use of these models is that the required composition is yet to be found despite numerous case studies. To address this issue, we trained an ANN to design Fe-based BMGs that predict the thermal properties. Models were trained using only the composition of the alloy as input and were created from a database of more than 150 experimental data of Fe-based BMGs from relevant literature. We adopted these ANN models to design BMGs with thermal properties to satisfy the intended purpose using particle swarm optimization. A melt spinner was employed to fabricate the designed alloys. X-ray diffraction and differential thermal analysis tests were used to evaluate the specimens.

Room Temperature Plasticity of Zr65Al7.5Ni10Cu17.5-xPdx Bulk Metallic Glasses

2007 ◽  
pp. 2054-2058
Author(s):  
Kyosuke Yoshimi ◽  
Hidemi Kato ◽  
Junji Saida ◽  
Akihisa Inoue
Keyword(s):  
Metallic Glasses ◽  
Room Temperature ◽  
Bulk Metallic Glasses

Mapping strain fields induced in Zr-based bulk metallic glasses during in-situ nanoindentation by X-ray nanodiffraction

2016 ◽  
Vol 108 (3) ◽  
pp. 031907 ◽  
Author(s):  
J. Gamcová ◽  
G. Mohanty ◽  
Š. Michalik ◽  
J. Wehrs ◽  
J. Bednarčík ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Strain Fields ◽  
X Ray

Heterogeneities in CuZr-based bulk metallic glasses studied by x-ray scattering

2011 ◽  
Vol 23 (7) ◽  
pp. 075402 ◽  
Author(s):  
X D Wang ◽  
H B Lou ◽  
Y Gong ◽  
U Vainio ◽  
J Z Jiang
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Strukturwandel eines Benzocyclobutadiens bei seiner Komplettierung/Structural Change of a Benzocyclobutadiene by Complexation

1979 ◽  
Vol 34 (1) ◽  
pp. 125-126 ◽  
Author(s):  
Henner Straub ◽  
Gerd Döring ◽  
Werner Winter
Keyword(s):  
Structural Change ◽  
Room Temperature ◽  
X Ray ◽  
Tert Butyl

Abstract η4 (1,2-Di-tert-butyl-3,4,5,6-tetramethylbenzo-cyclobutadiene)tricarbonyliron (2) is prepared by reaction of the respective free benzocyclo-butadiene (1) and nonacarbonyl-diiron at room temperature. X-ray data of the free and complexed ligand are compared.

Mapping the Strain Distributions in Deformed Bulk Metallic Glasses Using Hard X-Ray Diffraction

2012 ◽  
Vol 43 (5) ◽  
pp. 1558-1563 ◽  
Author(s):  
J. Bednarcik ◽  
L. Y. Chen ◽  
X. D. Wang ◽  
J. Z. Jiang ◽  
H. Franz
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Studi Metode Pendinginan Super Cepat untuk Pembentukan Bulk Metallic Glasses pada Paduan Cu45Zr45Al5Ag5

2019 ◽  
Vol 3 (2) ◽  
pp. 10-17
Author(s):  
Andromeda Dwi Laksono ◽  
Rifqi Aulia Tanjung
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Differential Scanning Calorimetry ◽  
Metallic Glasses ◽  
Electron Probe ◽  
Bulk Metallic Glasses ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Energy Dispersion Spectrometer ◽  
Scanning Electron

Bulk Metallic Glass (BMG) memiliki sifat mekanik, magnetik, kimia dan fisik yang berbeda dengan paduan polikristalin karena susunan internal atomnya yang tidak teratur. Sehingga, BMG memiliki kekuatan mekanik yang baik, kekerasan yang tinggi, ketahanan terhadap aus dan korosi yang tinggi, dan kehalusan permukaan yang baik. Berdasarkan sifat tersebut, BMG memiliki kelayakan yang menjanjikan di bidang industry. Dalam penelitian ini, metode pengecoran cetakan di tembaga digunakan untuk menyiapkan BMG paduan Cu45Zr45Al5Ag5. Paduan dileburkan ulang dengan pendinginan super cepat menggunakan mesin pendingin di bawah temperatur -25 oC. Dengan metode pengecoran cetakan di tembaga, sampel ukuran besar berbentuk batang dipotong dengan diameter 2 mm hingga 4 mm dan panjang 30 mm. Batang kemudian dipotong lagi menjadi spesimen berbentuk cakram. Untuk memastikan apakah sampel adalah BMG atau tidak, sampel dievaluasi dengan Scanning Electron Microscopy (SEM), Energy Dispersion Spectrometer (EDS), Differential Scanning Calorimetry (DSC), Electron Probe X-ray Micro Analyzer (EPMA), dan X -ray Difraction (XRD). Hasilnya dibahas dalam penelitian ini. Kata Kunci: Bulk Metallic Glasses, Cu45Zr45Al5Ag5, Pengecoran Cetakan di Tembaga.

Plastic zone at crack tip: A nanolab for formation and study of metallic glassy nanostructures

2009 ◽  
Vol 24 (9) ◽  
pp. 2986-2992 ◽  
Author(s):  
X.X. Xia ◽  
Wei H. Wang ◽  
A. Lindsay Greer
Keyword(s):  
Fracture Surface ◽  
Plastic Zone ◽  
Metallic Glasses ◽  
Room Temperature ◽  
Crack Tip ◽  
Plastic Zone Size ◽  
Fracture Mechanisms ◽  
Clear Correlation ◽  
Zone Size ◽  
Deformation And Fracture

We report that various metallic glassy nanostructures including nanoridges, nanocones, nanowires, nanospheres, and nanoscale-striped patterns are spontaneously formed on the fracture surface of bulk metallic glasses at room temperature. A clear correlation between the dimensions of these nanostructures and the size of the plastic zone at the crack tip has been found, providing a way to control nanostructure sizes by controlling the plastic zone size intrinsically or extrinsically. This approach to forming metallic glassy nanostructures also has implications for understanding the deformation and fracture mechanisms of metallic glasses.

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