Effect of Jet Milling on HDH CP-Ti Powders: Microstructure and Properties

Tao, Qiying; Ding, Wangwang; Chen, Gang; Qu, Xuanhui; Han, Lihui; Qin, Mingli

doi:10.1007/s11837-021-04789-6

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…In the fluidized bed opposed jet mill, the particle is entrained and accelerated by two high-speed airflows along the same axis, causing particles to collide and undergo grinding [1]. The jet mill offers advantages such as high crushing efficiency, low energy consumption, and minimal material contamination, which is primarily employed in the production of food, medicines, chemicals, and minerals.…”

Section: Introductionmentioning

confidence: 99%

Research on the Grinding Process of Superhard Particles in the Fluidized Bed Opposed Jet Mill Based on the CFD-DEM Methodology

Shen,

Jiang,

Liu

et al. 2024

Minerals

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The process of superhard particle breakage in the grinding zone of the fluidized bed opposed jet mill is investigated using the CFD-DEM (computational fluid dynamics-discrete element method) coupling method with the Tavares UFRJ Breakage Model in the present study. The effects of structural and operational parameters, such as target plate structure, nozzle position, air inlet velocity, and feed rate, on the equipment stress distribution, airflow velocity, pressure field, particle velocity, and cumulative particle size distribution are thoroughly studied to determine the optimal structural and operational parameters. Experimental validation is conducted, including scanning electron microscope (SEM) observation of particle morphology and analysis of particle size distribution of ground product particles. The simulation results indicate that the wear rate of the structure without a target plate is lower than that of the structure with a target plate in the grinding central zone. Therefore, the structure without a target plate is chosen for further investigation. The cumulative particle size distribution after grinding is influenced by nozzle position, air inlet velocity, and feed rate. The particle D50 is positively correlated with nozzle spacing and feed rate, while it is negatively correlated with air inlet velocity. The optimal grinding effect is achieved when the distance between the nozzle and the center of the grinding zone ranges from 52.5 mm to 72.55 mm, the air inlet velocity is 950 m/s, and the feed rate is 10.5 g/s. Through experimental investigation, it has been observed that when the feed rate is 10 g/s, the particle size distribution becomes more uniform. Furthermore, consistent trends in the cumulative particle size distribution in the experiment and simulation results can be found, which validates the present numerical model. It was observed that particles at low feed rates retain certain angular edges, while particle roundness increases at high feed rates.

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Section: Introductionmentioning

confidence: 99%

Research on the Grinding Process of Superhard Particles in the Fluidized Bed Opposed Jet Mill Based on the CFD-DEM Methodology

Shen,

Jiang,

Liu

et al. 2024

Minerals

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“…(a)-(c) Reprinted from[22], Copyright (2019), with permission from Elsevier. (d) Representative tensile engineering stress-strain curves of the L-PBF pure Ti as a function of scanning speed at room temperature, (e) summary of ultimate tensile engineering stress versus engineering strain for the L-PBF pure Ti including the as-treated HDH powders with the optimal tensile properties, and other results using the GA powders with the oxygen levels of 0.12 wt%[150], 0.13 wt%[151], 0.17 wt%[152], and the HDH powders prepared by jet milling[153] and ball milling[79] with the oxygen levels of 0.17 wt% and 0.27 wt%, respectively. (d), (e) Reprinted from[24], Copyright (2023), with permission from Elsevier.…”

mentioning

confidence: 99%

Characterization, preparation, and reuse of metallic powders for laser powder bed fusion: a review

Sun,

Chen,

Liu

et al. 2023

Int. J. Extrem. Manuf.

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Laser powder bed fusion (L-PBF) has attracted significant attention since its inception, providing unprecedented advantages to fabricate metallic components with complex geometry. The quality and performance of as-printed alloys is an intricate function consisting of numerous factors linking the feedstock powders, manufacturing, and post-treatment. As the starting materials, powders play a critical role in influencing the printing consistency, total fabrication cost, and mechanical properties. In consideration of its importance for L-PBF, the present review aims to review the recent progress on metallic powders for L-PBF focusing on powder characterization, powder fabrication, and powder reuse. The methods of powder characterization and fabrication were presented in the beginning by analyzing the principles and corresponding advantages and limitations. Subsequently, the effect of powder reuse on the powder characteristics and mechanical performance of L-PBF parts is analyzed focusing on steels, nickel-based superalloys, Ti and Ti alloys, and Al alloys. The evolution trend of powders and as-printed parts varies for different alloy systems based on the existing studies, which makes the proposal of a unified reuse protocol infeasible. Finally, perspectives are presented to cater to the increasing applications of AM technologies for future investigations. The present state-of-the-art work can pave the way for the broad industrial applications of L-PBF by enhancing printing consistency and reducing the total cost from the perspective of powders.

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Enhanced mechanical properties by laser powder bed fusion using cost-effective hydride-dehydride titanium powders

Ding

Tao

Chen

et al. 2023

Journal of Materials Processing Technology

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Effect of Jet Milling on HDH CP-Ti Powders: Microstructure and Properties

Cited by 5 publications

References 37 publications

Research on the Grinding Process of Superhard Particles in the Fluidized Bed Opposed Jet Mill Based on the CFD-DEM Methodology

Research on the Grinding Process of Superhard Particles in the Fluidized Bed Opposed Jet Mill Based on the CFD-DEM Methodology

Characterization, preparation, and reuse of metallic powders for laser powder bed fusion: a review

Enhanced mechanical properties by laser powder bed fusion using cost-effective hydride-dehydride titanium powders

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