Comparison of sequential and circular scanning thermal fields and their influence on microstructure of Alnico alloy produced by laser powder bed fusion

Кузнецов, П. А.; Шакиров, И. В.; Mozhayko, A. A.; Zhukov, A. S.; Bobyr, Vitaliy

doi:10.1088/1742-6596/1967/1/012064

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…However, despite these noteworthy density enhancements, the samples displayed surface defects, notably porosity and cracks in LPBF-processed Alnico-5 [56,57]. A similar scenario was observed when Alnico-8 was processed via LPBF with a heated stage at 800 °C, with evident porosity [34,59]. In contrast, Shakirov et al demonstrated that meticulous optimization of process parameters, specifically employing settings at 190 W and 700 mm/s, resulted in Alnico-5 samples with reduced porosity and cracks [57].…”

Section: Additive Manufacturing Of Alnicomentioning

confidence: 62%

“…Figure 15. Schematic of quasi-binary phase diagram of Alnico-8 with (α 1 ) and (α 2 ) [5].Table 6.The phases observed in Alnico samples fabricated through various processes for both the as-processed and post-heat treatment conditions[1,4,34,[54][55][56][57][58][59]91].ProcessingAs Processed (Microstructure)…”

mentioning

confidence: 99%

“…Table summarizing AM process parameters for different Alnico variants and their compositions[4,34,[54][55][56][57][58][59][60]. Melt pool size is kept constant by varying the laser power.…”

mentioning

confidence: 99%

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Additively Manufactured Alnico Permanent Magnet Materials—A Review

Dussa,

Joshi,

Sharma

et al. 2024

Magnetism

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Additive manufacturing offers manufacturing flexibility for intricate components and also allows for precise control over the microstructure. This review paper explores the current state of the art in additive manufacturing techniques for Alnico permanent magnets, emphasizing the notable advantages and challenges associated with this innovative approach. Both the LPBF and L-DED processes have demonstrated promising results in fabricating Alnico with magnetic properties comparable with conventionally processed samples. The optimization of process parameters successfully reduced porosity and cracking in the LPBF processing of Alnico. The review further explored the significance of additive manufacturing process parameter optimization in managing the temperature gradient and solidification rate for a desired microstructure and enhanced magnetic properties. Other potential additive manufacturing methods suitable for the fabrication of Alnico were discussed, along with the challenges associated with the process. The insights provided also highlight how additive manufacturing holds the potential to replace post-processing techniques like solutionization, magnetic annealing, and tempering often necessary in Alnico production.

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Section: Additive Manufacturing Of Alnicomentioning

confidence: 62%

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confidence: 99%

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Additively Manufactured Alnico Permanent Magnet Materials—A Review

Dussa,

Joshi,

Sharma

et al. 2024

Magnetism

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Evaluation of the Possibility of Formation of a Controlled Structure by Changing the Technological Parameters of the LPBF Process

Shakirov,

Olisov,

Kuznetsov

et al. 2023

Phys. Metals Metallogr.

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Experimental and theoretical investigation of the formation of the surface layer highly alloyed with aluminum

Mozhayko

Gerashchenkov

Старицын

2022

Vopr. materialoved.

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Laser surface treatment is a complex process in which, under the influence of a laser, the surface of material melts, while changing its structure and properties. In this paper, we consider the simulation of the process and present the results of studying the influence of laser processing parameters on the dimensions of the melt pool. The main purpose of the study is to reveal the dependence of the depth of the melt pool, namely the thickness of the layer in which the mixing process of the components takes place, on the laser parameters. As a result of the study, it was found that after laser treatment of the surface of samples with a coating thickness of 20, 40 and 80 μm at a beam speed of 100 mm/s and power of 180 W, the coating material is completely mixed with the substrate. It is also shown that with the laser travel speed 400 and 800 mm/s and the power 180 W, there is no mixing of the components in the impact zone, since the energy input is not enough.

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Comparison of sequential and circular scanning thermal fields and their influence on microstructure of Alnico alloy produced by laser powder bed fusion

Cited by 5 publications

References 9 publications

Additively Manufactured Alnico Permanent Magnet Materials—A Review

Additively Manufactured Alnico Permanent Magnet Materials—A Review

Evaluation of the Possibility of Formation of a Controlled Structure by Changing the Technological Parameters of the LPBF Process

Experimental and theoretical investigation of the formation of the surface layer highly alloyed with aluminum

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