Researches of the technological properties of metal-powder compositions of VT6 and VT20 titanium alloys obtained by induction melting and gas atomization

2017 ◽  
pp. 6-6
Author(s):  
A.E. Knyazev ◽  
◽  
S.V. Nerush ◽  
M.I. Alishin ◽  
I.S. Kuko ◽  
...  
Keyword(s):  
Titanium Alloys ◽  
Metal Powder ◽  
Induction Melting ◽  
Gas Atomization ◽  
Technological Properties ◽  
Vt20 Titanium

scholarly journals Multi-physics coupling simulation of electrode induction melting gas atomization for advanced titanium alloys powder preparation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hailin Li ◽  
Yongpeng Shen ◽  
Pu Liu ◽  
Weihua Liang ◽  
Mingjie Wang ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Titanium Alloys ◽  
Melting Process ◽  
Heat Radiation ◽  
Induction Melting ◽  
Gas Atomization ◽  
Arbitrary Lagrangian Eulerian ◽  
Tight Coupling ◽  
Powder Preparation ◽  
Coupling Strategy

AbstractA numerical modeling method is proposed for the melting process of Titanium metals of Titanium alloys powder preparation used for 3D printing. The melting process simulation, which involves the tight coupling between electromagnetic field, thermal field and fluid flow as well as deformation associated during the melting process, is conducted by adopting the finite element method. A two-way coupling strategy is used to include the interactions between these fields by incorporating the material properties dependent on temperature and the coupling terms. In addition, heat radiation and phase change are also considered in this paper. The arbitrary Lagrangian–Eulerian formulation is exploited to model the deformation of Titanium metal during the melting process. The distribution of electromagnetic flux density, eddy current density, temperature, and fluid flow velocity at different time can be determined by utilizing this numerical method. In a word, the method proposed in this paper provides a general way to predict the melting process of electrode induction melting gas atomization (EIGA) dynamically, and it also could be used as a reference for the design and optimization of EIGA.

scholarly journals Production and investigation of powders for additive synthesis from a new beta-solidifying TiAl-based alloy

2021 ◽  
Vol 2144 (1) ◽  
pp. 012004
Author(s):  
P V Panin ◽  
I A Bogachev ◽  
E A Lukina
Keyword(s):  
Phase Composition ◽  
Chemical Composition ◽  
Equilibrium Phase ◽  
Fold Increase ◽  
Induction Melting ◽  
Technological Properties ◽  
Powder Flowability ◽  
Powder Particles ◽  
Additive Synthesis ◽  
Composition Structure

Abstract Chemical composition, structure, and technological properties have been investigated for metal powder compositions (MPCs) of a new six-component TiAl-based alloy with Gd microadditions: Ti-31.0Al-2.5V-2.5Nb-2.5Cr-0.4Gd, wt.% (Ti-44.5Al-2V-1Nb-2Cr-0.1Gd, at.%). Three MPCs fractions (10–63, 40–100, 80–120 μm) were produced by electrode induction melting and inert gas atomization technique and targeted for the additive synthesis of parts. It is shown that the chemical composition of the MPCs for the main elements corresponds to that of the electrode. In contrast, a 1.5-fold increase of the oxygen content in the MPCs was observed, which is being the result of natural oxidation of powder particles upon air environment due to developed specific surface. It has been determined that the phase composition of the MPCs (γ+α(α2)+β) differs from the equilibrium phase composition of the electrode (γ+α2)+β0/B2) and corresponds to a rapidly quenched metastable state, which indicates high solidification rates in the atomization process, exceeding critical cooling rates of the alloy. The technological properties, specifically the powder flowability, were found to be improved for 40–100 and 80–120 μm fractions, making them applicable for additive synthesis of parts from the studied alloy by selective electron-beam melting method

Mechanical and technological properties of ternary titanium alloys

1961 ◽  
Vol 3 (3-4) ◽  
pp. 157-161
Author(s):  
L. P. Luzhnikov ◽  
V. M. Novikova
Keyword(s):  
Titanium Alloys ◽  
Technological Properties

Design of a Nozzle for the Production of Metal Powder via Gas Atomization

2013 ◽  
Author(s):  
Mehmet Alper Sofuoglu ◽  
Murat Erbas ◽  
Ibrahim Uslan ◽  
Atilla Biyikoglu
Keyword(s):  
Numerical Model ◽  
Flow Velocity ◽  
Metal Powder ◽  
Nozzle Exit ◽  
Maximum Pressure ◽  
Gas Atomization ◽  
Exit Angle ◽  
Second Stage ◽  
Empirical Relations ◽  
Two Stages

In this study, a nozzle has been designed in order to produce metal powder via the method of gas atomization. The design has been performed in two stages. At the first stage of design, the size and geometry of the nozzle have been determined using empirical relations as a pre-design. At the second stage, a parametrical analysis has been done using a CFD code. As a parametrical study, the effects of nozzle exit angle, throat distance and protrusion length on pressure and flow velocity at the nozzle exit are investigated with the numerical model. Appropriate values for the investigated parameters have been determined to get maximum pressure in vacuum condition at the tip of the melt. The nozzle has been designed based on the determined parameters.

scholarly journals Receiving finely divided metal powder by inert gas atomization

2018 ◽  
Vol 347 ◽  
pp. 012033 ◽  
Author(s):  
M A Smirnov ◽  
M A Kaplan ◽  
M A Sevostyanov
Keyword(s):  
Metal Powder ◽  
Inert Gas ◽  
Gas Atomization

SIEVING OF POWDERS ADDITIVE AND POWDER MANUFACTURINGS (review)

2020 ◽  
pp. 11-20
Author(s):  
A.E. Knyazev ◽  
◽  
A.V. Vostrikov ◽  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Metal Powder ◽  
Metal Powders ◽  
Technological Properties ◽  
Factors Affecting ◽  
Ultrasonic Cleaning

Considers the features of powders obtained by various methods, their technological properties in relation to additive and granular manufacturing. The sequence of operations upon receipt of metal powder compositions is presented. The factors affecting the process of vibration sieving of metal powders and granules are described. The features and advantages of vibratory sieving on horizontally arranged circular sieves using ultrasonic cleaning to obtain specified trajectories of motion are shown. Criteria for evaluating the sieving efficiency are given and explanations are given for determining the particle size distribution of powders and granules.

scholarly journals Atomization of Ti-64 alloy using the EIGA process: comparison of the characteristics of powders produced in labscale and industrial-scale facilities

2020 ◽  
Vol 321 ◽  
pp. 07013
Author(s):  
Stefan Drawin ◽  
Agathe Deborde ◽  
Marc Thomas ◽  
Michel Pierronnet ◽  
Layla Sasaki ◽  
...  
Keyword(s):  
Surface Defects ◽  
Inert Gas ◽  
Spherical Particles ◽  
Industrial Scale ◽  
Induction Melting ◽  
Gas Atomization ◽  
High Quality ◽  
Porosity Level ◽  
Porous Particles ◽  
Process Comparison

Titanium alloy powders, mostly the Ti-64 alloy with composition Ti-6Al-4V (wt.%), are extensively used for biomedical and high-demanding applications, e.g. in aeronautics. Advanced powder metallurgy processes like additive manufacturing are strong drivers for the production of high quality powders, insuring a good rheological behavior, a low porosity level in the parts and an adequate roughness. Ideally, fine spherical particles with no volume and surface defects are aimed at. Inert gas atomization is a process that is able to produce clean powders for such applications, especially for AM. To avoid the chemical reaction of titanium with the commonly used alumina crucibles, a crucible-free configuration has been designed in the EIGA process (Electrode induction melting Inert Gas Atomization). Two EIGA facilities are currently available in France for R&D purposes: a one-liter (nominal rod diameter/length (mm): 50/500) labscale facility at ONERA and an eight-liter capacity (100/1000) industrial-scale facility at the MetaFensch Institute. Using the smaller facility to screen and optimize atomization parameters and transfer them to the bigger facility is a tempting approach. This communication will show the characteristics of Ti-64 powders produced in both facilities, in terms of particle shape, particle size distribution, presence of satellites and porous particles.

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