Effect of atomization pressure on the breakup of TA15 titanium alloy powder prepared by EIGA method for laser 3D printing

Wei, Mingwei; Chen, Suiyuan; Liang, Jing; Liu, Changsheng

doi:10.1016/j.vacuum.2017.06.014

Cited by 43 publications

(18 citation statements)

References 24 publications

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“…The particle size is distributed in the range of 100-710 µm, roughly centered around 212-355 µm, for which the yield of 14-22 wt% is obtained. This result contrasts with that the particle size is typically 100 µm or less in conventional EIGA experiments [32][33][34][35][36]. The atomizing gas pressure values in this study, 1.5-3.5 MPa, are lower than those used in these previous studies.…”

Section: Particle Size Distributioncontrasting

confidence: 79%

Magnetocaloric particles of the Laves phase compound HoAl2 prepared by electrode induction melting gas atomization

Yamamoto,

Takeya,

Saito

et al. 2022

Preprint

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Processing magnetocaloric materials into magnetic refrigerant particles is an essential issue in developing high-performance magnetic refrigerators. Here, we succeed in stably producing magnetocaloric particles of the promising material HoAl 2 by a newly devised method based on electrode induction melting gas atomization process. The particle size range is on the order of submillimeters, which is suitable for practical refrigeration systems. The resulting particles with less contamination have good morphological, magnetic, and magnetocaloric properties: (i) almost spherical shapes with few internal pores, (ii) a sharp ferromagnetic transition around 30 K, and (iii) a large magnetocaloric effect comparable to the bulk counterpart. These features suggest the HoAl 2 gas-atomized particles have the potential of use as a magnetic refrigerant. The presented method can be applied not only to HoAl 2 but also to other brittle magnetocaloric materials with high melting points, facilitating the production of various magnetic refrigerants needed to develop magnetic refrigerators for hydrogen liquefaction.

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Section: Particle Size Distributioncontrasting

confidence: 79%

Magnetocaloric particles of the Laves phase compound HoAl2 prepared by electrode induction melting gas atomization

Yamamoto,

Takeya,

Saito

et al. 2022

Preprint

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“…On the one hand, the gas blast disturbs the fluid stream, facilitating fluid granulation and the generation of fine powders. According to previous studies on GA, the powder size decreases with increasing atomizing gas pressure 28 , 29 . On the other hand, the gas blast enhances the convective heat transfer between the fluid and atmosphere 30 , improving the cooling rate of the fluid pushed out of the electrode rim.…”

Section: Resultsmentioning

confidence: 77%

Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process

Zhao

Cui

Numata

et al. 2020

Sci Rep

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In recent years, spherical powders with no or minimal internal pores fabricated by the plasma rotating electrode process (PREP) have been highly recommended for powder-type additive manufacturing. Most research on PREP is aimed at establishing relationship between PREP parameters and powder size. However, almost no dedicated research on granulation behavior has been conducted so far. In the present study, PREP experiments of Ti64 and SUS316 alloys were carried out. Numerical modeling based on computational thermo-fluid dynamics was developed to analyze the granulation behavior. In particular, the roles of the additionally introduced gas blast and the morphology of the electrode end surface in fluid granulation were preliminarily investigated. The study showed that in addition to the electrode's rotating speed and diameter, manipulating the plasma arc current (i.e., the melting rate) could also be an effective way to control the PREP-powder size. According to the simulation, there were competing actions of the gas blast affecting the powder size. The gas blast created disturbance on the fluid and deepened the depression of the electrode end surface, which facilitated powder refinement. However, the cooling effect enhanced the fluid stability and hindered fluid granulation. The conclusions indicated the possibility of using various methods to manipulate PREP-powder size.

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“…Therefore, the splashed satellite particles will impact large-sized powder to bond the "satellite" and large particles. All abrasives have a similar composition and maintain uniform spheres [25,26].…”

Section: Microstructure and Edsmentioning

confidence: 99%

Beading Mechanism and Performance of Porous Steel Slag Microbead Abrasive

et al. 2021

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The use of the gas-quenching process for preparing porous bead slag abrasive was investigated in this paper. An X-ray diffractometer, field emission scanning electron microscope, mercury intrusion porosimetry, and stereo microscope were used to analyze the microbead forming mechanism, pore structure, acid–alkali resistance, and polishing properties of porous steel slag microbead abrasives. Results show that the porous steel slag abrasives present a mono-disperse spherical shape with a hard shell and the porosity is 42.36%. The thermodynamic fractal model indicates that the fractal dimension of the abrasive is 2.226, which shows its simple pore structure. The sample has better chemical stability in the polishing fluid than in water, acid, and alkali solution. Therefore, aluminum and copper alloys are used as substrates for polishing tests. The results indicate that the abrasives could effectively improve the quality of the workpiece surface and the polishing efficiency for aluminum alloy was higher than that for copper alloy.

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Effect of atomization pressure on the breakup of TA15 titanium alloy powder prepared by EIGA method for laser 3D printing

Cited by 43 publications

References 24 publications

Magnetocaloric particles of the Laves phase compound HoAl2 prepared by electrode induction melting gas atomization

Magnetocaloric particles of the Laves phase compound HoAl2 prepared by electrode induction melting gas atomization

Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process

Beading Mechanism and Performance of Porous Steel Slag Microbead Abrasive

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