Mechanical Crystallization of Amorphous Ti50Al30Ni20 Alloy Prepared by Mechanical Alloying

Petr Urban; Fátima Ternero Fernández; Rosa María Aranda Louvier; Raquel Astacio Lopez; Francisco G. Cuevas

doi:10.4028/p-c543h4

Paper Titles

Preface

Mechanical Crystallization of Amorphous Ti₅₀Al₃₀Ni₂₀ Alloy Prepared by Mechanical Alloying
p.3

Nickel Porous Compacts Obtained by Electrical Discharge Consolidation
p.9

Effect of Electron Beam Welding on the Microstructure and Mechanical Properties of Low-Cost Titanium Alloys
p.15

Effect of Tool Geometry and Turning Parameters on Cutting Force during Ultra-Precision Diamond Machining of Rapidly Solidified Aluminum (RSA) Alloy 6061
p.21

Localized Corrosion Susceptibility of 434 Ferritic Stainless Steel in Acid Chloride Media
p.29

Inhibition Performance of Arachis Hypogaea Extracts on 316L Steel in HCl Solution
p.35

Adsorption and Inhibition Performance of Arachis hypogaea Extracts on 316L Steel in H₂SO₄ Solution
p.41

Investigation of Interfacial Microstructures of TiN/AlN Multilayers by Neutron Reflectometry
p.47

HomeMaterials Science ForumMaterials Science Forum Vol. 1059Mechanical Crystallization of Amorphous...

Mechanical Crystallization of Amorphous Ti₅₀Al₃₀Ni₂₀ Alloy Prepared by Mechanical Alloying

Abstract:

Laser diffraction, Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and Differential Scanning Calorimetry (DSC) were employed to characterize the particle size, morphology and structure of mechanically alloyed Ti₅₀Al₃₀Ni₂₀ alloy. Cyclic amorphous-crystalline-amorphous phase transformations were investigated during mechanical alloying, using high-energy ball milling technique. After 20 h of milling, an amorphous/nanocrystalline phase was obtained. This amorphous/nanocrystalline phase tended to transform into crystalline grains after 50 h of milling. In a cyclic phase transformation, the obtained crystalline phase is transformed into the amorphous phase after 70 h of milling. This amorphous phase crystallized through a single sharp exothermic peak at 590°C. On the basis of our results, the destabilizing effect of the defects created by the milling media (balls), which leads to the cyclic transformations, depends on the input energy and milling time.

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Materials Science Forum (Volume 1059)

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3-8

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https://doi.org/10.4028/p-c543h4

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Online since:

April 2022

Authors:

Petr Urban*, Fátima Ternero Fernández, Rosa María Aranda Louvier, Raquel Astacio Lopez, Francisco G. Cuevas

Keywords:

Aluminium, Amorphization, Crystallization, Mechanical Alloying, Nickel, Titanium

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