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 Keyhole formation and thermal fluid flow-induced porosity during laser fusion welding in titanium alloys: Experimental and modelling

2017 ◽  
Vol 126 ◽  
pp. 251-263 ◽  
Author(s):  
Chinnapat Panwisawas ◽  
Bama Perumal ◽  
R. Mark Ward ◽  
Nathanael Turner ◽  
Richard P. Turner ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Titanium Alloys ◽  
Fusion Welding ◽  
Laser Fusion ◽  
Thermal Fluid Flow

Casting and Laser Surface Melting of 316L Stainless Steel from Scrap Resources

2020 ◽  
Vol 835 ◽  
pp. 306-316
Author(s):  
Haitham Elgazzar ◽  
Shimaa El-Hadad ◽  
Hassan Abdel-Sabour
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Melting Process ◽  
Industrial Applications ◽  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Steel Scrap ◽  
Induction Melting ◽  
Nano Size

316L stainless steel is used in various industrial applications including chemical, biomedical and mechanical industries due to its good mechanical properties and corrosion resistance. Recycling of 316L stainless steel scrap without significantly reducing its value has received recently great attention because of the environmental regulations. In the current work, 316L stainless steel scrap was recycled via casting using Skull induction melting technique. The casted products subsequently subjected to laser surface melting process to improve its surface properties to be used for harsh environment. The results showed defect free surfaces with homogeneous microstructures. Nano size grains were also obtained due to rapid solidification process. Such nano size grains are preferred for extending the usage of the 316L stainless steel in new applications.Corresponding author: E-Mail: [email protected]

Investigation of heating and melting in ELTA programs

2019 ◽  
Vol 39 (1) ◽  
pp. 117-124
Author(s):  
Vladimir Bukanin ◽  
Aleksandr Ivanov ◽  
Alexei Zenkov
Keyword(s):  
Optimization Procedure ◽  
Melting Process ◽  
Continuous Heating ◽  
Induction Melting ◽  
Preliminary Evaluation ◽  
Content Type ◽  
Initial Stage ◽  
Crucible Furnace ◽  
The Relationship

Purpose The purpose of this paper is obtaining the optimal parameters of induction heating and melting systems by use of the new programs ELectro-Thermal Analysis (ELTA) 8.0 and Induction Crucible Furnace (ICF) to improve a quality of final products. Design/methodology/approach Simulation of continuous through heating prior a drawing through the draw plate is realized by an optimization procedure. Additional application of ELTA 8.0 “Heating of Wire” reveals the relationship between power, time and thermal profile of load during heating. Rational variants of ICFs for melting processes are obtained using several step-by-step iterations. Findings ELTA 8.0 program permits to optimize the continuous heating of copper, steel, titanium and other wires. ICF ELTA program was used at the initial stage of the development of new technological processes and the ICFs. This program provides a preliminary evaluation of an induction melting process and system before the use of more sophisticated 2D or 3D programs. Results of optimization allowed to find a rational decision of an induction system, the required parameters of a refractory and a power supply. Non-conductive and graphite crucibles of the furnace were compared from electrical and economical points of view. Originality/value Fast calculation of ELTA programs allows the designer to provide the required temperature distribution in a cross section and along the part to control the real-time processes of heating and melting.

Effects of Melting Process on the Microstructure and Thermal Conductivity of Cu-10Ni-5Mo Alloy

2011 ◽  
Vol 415-417 ◽  
pp. 289-292
Author(s):  
Bai Ping Lu ◽  
Hui Xu ◽  
Can Cheng Liu
Keyword(s):  
Thermal Conductivity ◽  
Solid Solution ◽  
Injection Moulding ◽  
Melting Process ◽  
Induction Melting ◽  
Melting Points ◽  
Arc Melting ◽  
Coefficient Of Thermal Conductivity

Cu-10Ni-5Mo alloys have been prepared by arc-melting and induction melting injection moulding. The effects of melting processes on the microstructure and thermal conductivity of Cu-10Ni-5Mo alloys were studied. The results show that the grain of Cu-10Ni-5Mo alloy prepared by arc-melting is coarse and the structure includes α solid solution and Mo-Ni phase. The grain of Cu-10Ni-5Mo alloy prepared by induction melting injection moulding is superfine and the structure is α solid solution. Under this experiment condition, the coefficient of thermal conductivity of Cu-10Ni-5Mo alloy prepared by arc-melting is 56.9 W/(m•K)，while that of Cu-10Ni-5Mo alloy prepared by induction melting injection moulding is 35.7 W/(m•K). The melting points of Cu-10Ni-5Mo alloy prepared by two methods all increase and are little different.

Semi-Implicit Coupling of CS-FEM and FEM for the Interaction Between a Geometrically Nonlinear Solid and an Incompressible Fluid

2015 ◽  
Vol 12 (05) ◽  
pp. 1550025 ◽  
Author(s):  
Tao He
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Incompressible Fluid ◽  
Computational Cost ◽  
Geometrically Nonlinear ◽  
Arbitrary Lagrangian Eulerian ◽  
Coupling Strategy ◽  
Smoothed Finite Element Method ◽  
Characteristic Based Split ◽  
Element Method

A semi-implicit coupling strategy under the arbitrary Lagrangian–Eulerian description is presented for the incompressible fluid flow past a geometrically nonlinear solid in this paper. The incompressible fluid is solved by means of the characteristic-based split (CBS) finite element method while the cell-based smoothed finite element method is employed to settle the governing equation of the geometrically nonlinear solid. Because of the CBS fluid solver, the present coupling strategy is performed in a semi-implicit fashion. In particular, the first step of the CBS scheme is explicitly treated whereas the others are implicitly coupled with the structural motion. The computational cost is hence reduced because no subiterations are included in the explicit coupling step and the fluid mesh is frozen in the implicit coupling step. A classic cantilever problem is dealt with to validate the structural solver, and then flow-induced vibrations of a restrictor flap in a uniform channel flow is analyzed in detail. The obtained results agree well with the existing data.

scholarly journals Primary microstructure characterization of Co-20Ni-9Al-7W-3Re-2ti superalloy

2021 ◽  
pp. 44-44
Author(s):  
A. Tomaszewska
Keyword(s):  
Casting Process ◽  
Melting Process ◽  
Alloying Elements ◽  
Technological Problem ◽  
Induction Melting ◽  
Interdendritic Segregation ◽  
Segregation Of Alloying Elements ◽  
Titanium Nickel ◽  
Tungsten Concentration

The characterization of the primary microstructure of the new Co-based superalloy of Co-20Ni-9Al-7W-3Re-2Ti type was shown in this article. The investigated alloy was manufactured by induction melting process from pure feedstock materials. The fundamental technological problem related to Co-Al-W-X multicomponent alloys' casting process is a strong susceptibility to interdendritic segregation of alloying elements, especially tungsten and rhenium. The performed analysis revealed that the observed effect of alloying elements segregation is detectable and much stronger than for Co-9Al-9W and Co-20Ni-7Al-7W alloys, related to titanium, nickel and aluminium migration to inter-dendritic spaces. Consequently, the tungsten concentration gradient between dendritic and interdendritic zones is higher than for Co-9Al-9W and Co-20Ni-7Al-7W alloys. The same situation is in the case of rhenium and cobalt, but Co's concentration in the interdendritic zone is only slightly lower.

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