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Journal articles on the topic 'Powder melting'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Ayoola, W.A., W.J. Suder, and S.W. Williams. "Identification of Welding Regime in Powder Melting." Nigerian Research Journal of Engineering and Environmental Sciences 6, no. 2` (2021): 574–86. https://doi.org/10.5281/zenodo.5805165.

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<em>Identification of welding regime in powder bed additive manufacturing (AM) is a complex process. This is because in solid melting with homogeneous material where heat conduction is uniform, welding regime can easily be identified. However, in powder melting, heat conduction may vary due to non-homogenous nature of the powder particles, multiple reflection and inconsistence particle-solid plate interaction. This study compared melting behaviour of solid and powder materials when the same interaction parameters and beam diameter were applied. The beam diameters investigated were from 0.10 to

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Su, Pengsheng, Hao Yang, Linping Zhang, Yuewen Zhai, Yuhan Ge, and Xiaozhi Yang. "The research on the geometrical characteristics and microstructure of the cladding track of DZ125L Nickel-based alloy deposited by laser metal direct deposition." Journal of Physics: Conference Series 2819, no. 1 (2024): 012026. http://dx.doi.org/10.1088/1742-6596/2819/1/012026.

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Abstract This study investigates how variations in laser power, scanning speed, defocusing amount, and powder feeding impact the geometrical characteristics and microstructure of DZ125L nickel-based superalloy. The results show that the weld pool size increases with the rise of laser power, but higher laser power will increase the tendency of hot crack defects. With the increase of positive defocusing, the melting height and depth decrease, but the melting width rises first, then decreases and increases finally. The increase in scanning speed leads to the reduction in melting width and height,

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3

Young, Zachary, Minglei Qu, Meelap Michael Coday, et al. "Effects of Particle Size Distribution with Efficient Packing on Powder Flowability and Selective Laser Melting Process." Materials 15, no. 3 (2022): 705. http://dx.doi.org/10.3390/ma15030705.

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The powder bed-based additive manufacturing (AM) process contains uncertainties in the powder spreading process and powder bed quality, leading to problems in repeatability and quality of the additively manufactured parts. This work focuses on identifying the uncertainty induced by particle size distribution (PSD) on powder flowability and the laser melting process, using Ti6Al4V as a model material. The flowability test results show that the effect of PSDs on flowability is not linear, rather the PSDs near dense packing ratios cause significant reductions in flowability (indicated by the incr

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Tshabalala, Lerato Criselda, Ntombizodwa Mathe, and Hilda Chikwanda. "Characterization of Gas Atomized Ti-6Al-4V Powders for Additive Manufacturing." Key Engineering Materials 770 (May 2018): 3–8. http://dx.doi.org/10.4028/www.scientific.net/kem.770.3.

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In this paper, titanium powders from various sources were characterized to compare powder intergrity for additive manufacturing by selective laser melting process. Selective laser melting by powder-bed based Additive Manufacturing (AM) is an advanced manufacturing process that bonds successive layers of powder by laser melting to facilitate the creation of engineering components. This manufacturing approach facilitates the production of components with high geometrical complexity that would otherwise be impossible to create through conventional manufacturing processes. Although the use of powd

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Bigerelle, Maxence, Anaïs Galliere, Yucelys Y. Santana, et al. "A Multiscale Topographical Surface Analysis of High Entropy Alloys Coatings by Laser Melting." Materials 16, no. 2 (2023): 629. http://dx.doi.org/10.3390/ma16020629.

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High Entropy Alloys (HEAs) coatings obtained by laser melting (LM) technique were studied through a multiscale topographical surface analysis using a focus variation microscope. The laser melting creates a multiscale topography from under-powder size (incomplete or complete powder melting) to upper-powder size (process conditions). The surface topography must be optimized because of the significant influence on friction and material transfer during sliding wear. The analyses were shown that different pre-melting zone interactions were present. Statistical analysis based on covariance analyses

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Saprykin, Alexander A., Yuriy P. Sharkeev, Natalya A. Saprykina, and Egor A. Ibragimov. "The Mechanism of Forming Coagulated Particles in Selective Laser Melting of Cobalt-Chromium-Molybdenum Powder." Key Engineering Materials 839 (April 2020): 79–85. http://dx.doi.org/10.4028/www.scientific.net/kem.839.79.

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Selective laser melting (SLM) is thought to be a prospective manufacturing technology of complex metal components. Formation of coagulated particles when melting is reported to be an important factor for target mechanical properties of the end product. This paper discusses the effect of SLM parameters, including laser output power, laser movement velocity, preheating temperature of the powder, laser beam diameter on the mechanism of forming coagulated particles in melting cobalt-chromium-molybdenum powdered material. The study shows that a rise of power to 60 W at a scanning velocity 6 mm/s ca

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Saprykina, Natalia, Valentina Chebodaeva, Alexandr Saprykin, Yurii Sharkeev, Egor Ibragimov, and Taisiya Guseva. "Synthesis of a three-component aluminum-based alloy by selective laser melting." Metal Working and Material Science 24, no. 4 (2022): 151–64. http://dx.doi.org/10.17212/1994-6309-2022-24.4-151-164.

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Introduction. The technology of selective laser melting is one of the key technologies in Industry 4.0, which allows manufacturing products of any complex geometric shape, reducing significantly the amount of material used, reducing the lead time and obtaining a new alloy from elementary powders in the melting process. To understand the process of alloy formation under laser exposure, it is necessary to know the initial data of powders, which significantly affect the quality of the products obtained. The purpose of this study is to determine the requirements for the structural-phase state, ele

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van Belle, Laurent, and Alban Agazzi. "Inverse Thermal Analysis of Melting Pool in Selective Laser Melting Process." Key Engineering Materials 651-653 (July 2015): 1519–24. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.1519.

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The Selective Laser Melting (SLM) process of metallic powder is an additive technology. It allows the production of complex-shaped parts which are difficult to obtain by conventional methods. The principle is similar to Selective Laser Sintering (SLS) process: it consists, from an initial CAD model, to create the desired part layer by layer. The laser scans a powder bed of 40 μm thick. The irradiated powder is instantly melted and becomes a solid material when the laser moves away. A new layer of powder is left and the laser starts a new cycle of scanning. The sudden and intense phase changing

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Saprykina, Natalia, Valentina Chebodaeva, Alexandr Saprykin, Yurii Sharkeev, Egor Ibragimov, and Taisiya Guseva. "Optimization of selective laser melting modes of powder composition of the AlSiMg system." Metal Working and Material Science 26, no. 1 (2024): 22–37. http://dx.doi.org/10.17212/1994-6309-2024-26.1-22-37.

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Introduction. New aluminum-based powder systems are currently being developed for additive manufacturing. The scientists' work is aimed at comprehensive studies of powder production, optimization of conditions for alloy production and formation of three-dimensional specimens with minimal porosity and absence of cracking during selective laser melting. The purpose of this work is the synthesis of an almost spherical Al-Si-Mg composite powder (91 wt. % Al, 8 wt. % Si, 1 wt. % Mg) from aluminum powder PA-4 (GOST 6058-22), silicon powder (GOST 2169-69) and magnesium powder MPF-4 (GOST 6001-79), wh

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Balyakin, A. V. "Model of interaction between laser radiation and metal powder composition during direct laser growth." VESTNIK of Samara University. Aerospace and Mechanical Engineering 23, no. 4 (2024): 99–111. https://doi.org/10.18287/2541-7533-2024-23-4-99-111.

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This paper presents a model for analyzing the interaction of laser radiation and a metal-powder composition in the process of direct laser growing of large-sized combustion chambers of gas turbine engines. The metal-powder composition is fed into the melting zone coaxially with laser radiation; the task is to completely melt the powder with laser radiation before it enters the melt bath on the construction platform. The laser radiation is absorbed as it passes through the gas-powder jet, and its energy is also used to melt the construction platform or the previous layer. Thus, in order to dete

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Saprykina, Natal'ya, Aleksandr Saprykin, Egor Ibragimov, and Margarita Himich. "MODE INFLUENCE OF SELECTIVE LASER IMPACT UPON POROSITY OF SAMPLES OF COBALT, CHROMIUM AND MOLYBDENUM POWDERS." Bulletin of Bryansk state technical university 2021, no. 8 (2021): 22–28. http://dx.doi.org/10.30987/1999-8775-2021-8-22-28.

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The purpose of this investigation consists in the analysis of possibility to obtain products by means of the SLP method using powders of cobalt, chromium and molybdenum having considerable difference in melting temperatures of cobalt (1768ºC), chromium (2130ºC) and molybdenum (2890ºC), density, thermal conduction and solving for the optimum technological modes of powder composition melting to obtain samples with lower porosity.  The investigation methods include methods of physical material science.  Investigation results and novelty: a procedure for obtaining a powder composite of

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Condruz, Mihaela Raluca, Gheorghe Matache, and Alexandru Paraschiv. "Characterization of IN 625 recycled metal powder used for selective laser melting." Manufacturing Review 7 (2020): 5. http://dx.doi.org/10.1051/mfreview/2020002.

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Additive manufacturing of high-quality materials by Selective Laser Melting depends not only on establishing appropriate process parameters, but also on the characteristics of the metal powders used and their stability over time or after recycling. The aim of the research was to characterize the IN 625 powder used over multiple manufacturing cycles with a Lasertec 30 SLM machine. In order to achieve the research's goal, virgin and recirculated powder's physical and technological characteristics were investigated. A decrease in all D-values (D10, D50, D90) of the powder size distribution was ob

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Christakopoulos, Fotis, Enrico Troisi, and Theo A. Tervoort. "Melting Kinetics of Nascent Poly(tetrafluoroethylene) Powder." Polymers 12, no. 4 (2020): 791. http://dx.doi.org/10.3390/polym12040791.

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The melting behavior of nascent poly(tetrafluoroethylene) (PTFE) was investigated by way of differential scanning calorimetry (DSC). It is well known that the melting temperature of nascent PTFE is about 344 ∘ C, but reduces to 327 ∘ C for once molten material. In this study, the melting temperature of nascent PTFE crystals was found to strongly depend on heating rate, decreasing considerably for slow heating rates. In addition, during isothermal experiments in the temperature range of 327 ∘ C < T < 344 ∘ C, delayed melting of PTFE was observed, with complete melting only occurring after

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Wright, C. Steven, M. Youseffi, S. P. Akhtar, T. H. C. Childs, C. Hauser, and P. Fox. "Selective Laser Melting of Prealloyed High Alloy Steel Powder Beds." Materials Science Forum 514-516 (May 2006): 516–23. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.516.

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This paper presents the results of a recent comprehensive investigation of selective laser melting (slm) of prealloyed gas and water atomised M2 and H13 tool steel powders. The objective of the study was to establish the parameters that control the densification of single and multiple layers with the aim of producing high density parts without the need for infiltration. Powders were processed using continuous wave (CW) CO2 and Nd:YAG lasers. Relationships between alloy composition, powder particle size and shape, flowability, microstructure (phases present, their size, morphology and distribut

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Alkahari, Mohd Rizal, Tatsuaki Furumoto, Takashi Ueda, and Akira Hosokawa. "Melt Pool and Single Track Formation in Selective Laser Sintering/Selective Laser Melting." Advanced Materials Research 933 (May 2014): 196–201. http://dx.doi.org/10.4028/www.scientific.net/amr.933.196.

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Selective Laser Sintering/Selective Laser Melting (SLS/SLM) is one of Additive Manufacturing (AM) processes that utilize layer by layer powder deposition technique and successive laser beam irradiation based on Computer Aided Design (CAD) data. During laser irradiation on metal powders, melt pool was formed, which then solidified to consolidated structure. Therefore, melt pool is an important behavior that affects the final quality of track formation. The study investigates the melt pool behavior through visualization of the consolidation process during the single track formation on the first

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Yang, Xinliang, Feng Gao, Fengzai Tang, Xinjiang Hao, and Zushu Li. "Effect of Surface Oxides on the Melting and Solidification of 316L Stainless Steel Powder for Additive Manufacturing." Metallurgical and Materials Transactions A 52, no. 10 (2021): 4518–32. http://dx.doi.org/10.1007/s11661-021-06405-3.

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AbstractSurface oxidation of metallic powders may significantly affect their melting and solidification behavior and limit their service life in the additive manufacturing (AM) process. In the present work, three levels of surface oxide concentration were prepared on AM-grade 316L stainless steel powders, and their melting and solidification behavior was systematically studied through in-situ observation, advanced characterization, phase-field modeling, and theoretical analysis. Si, Mn, and Cr participated in the oxidation reaction in powder with low and medium oxygen contents, whereas Fe was

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Chen, Tiebing, and Yuwen Zhang. "Three-Dimensional Modeling of Selective Laser Sintering of Two-Component Metal Powder Layers." Journal of Manufacturing Science and Engineering 128, no. 1 (2005): 299–306. http://dx.doi.org/10.1115/1.2122947.

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Laser sintering of a metal powder mixture that contains two kinds of metal powders with significantly different melting points under a moving Gaussian laser beam is investigated numerically. The continuous-wave laser-induced melting accompanied by shrinkage and resolidification of the metal powder layer are modeled using a temperature-transforming model. The liquid flow of the melted low-melting-point metal driven by capillary and gravity forces is also included in the physical model. The numerical results are validated by experimental results, and a detailed parametric study is performed. The

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Vasilevskyi, Oleksandr, Alexandra Woods, Matthew Jones, and Michael Cullinan. "Quantitative Methodology for Assessing the Quality of Direct Laser Processing of 316L Steel Powder Using Type I and Type II Control Errors." Electronics 14, no. 7 (2025): 1476. https://doi.org/10.3390/electronics14071476.

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The paper proposes a methodology for assessing the quality of the direct laser melting process of 316L steel powder, which was tested when creating products in a construction furnace of the EOSINT M280 system at different laser powers. The methodology for evaluating the quality of the laser melting process is based on measuring the melting temperature of 316L steel powder using an infrared camera, assessing the expanded uncertainty of temperature measurements, and calculating the probabilities of the temperature falling within the established confidence limits based on type I and type II contr

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Fyrillas, Marios M., and Loucas Papadakis. "Transient Powder Melting in SLM Using an Analytical Model with Phase Change and Spherical Symmetry in a Semi-Infinite Medium." Journal of Manufacturing and Materials Processing 3, no. 2 (2019): 50. http://dx.doi.org/10.3390/jmmp3020050.

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In this work, we introduce an analytical expression for approximating the transient melting radius during powder melting in Selective Laser Melting (SLM) assumed with a stationary laser heat source. The purpose of this work is to evaluate the suggested analytical approach in determining the melt pool geometry during laser processing, by considering heat transfer and phase change effects. This will allow for the rendering of the first findings on the way to a quasi-real time calculation of the melt pool during laser melting, which will contribute significantly to the process design and control,

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Liu, Jin Hui, Rui Di Li, and Can Zhao. "Study on Fiber Laser Single Melting Track During Selective Laser Forming." Advanced Materials Research 97-101 (March 2010): 4020–23. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.4020.

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Melting tracks with and without powder materials were studied by varying the parameters in selective laser melting. Several characters of melting track such as melting width and gilled state stripes were analyzed combining the relationship between the powder materials and processing parameters. Connected with balling effects, thermal transmission and thermal physical properties of powder materials, the formation of above character were explained. The research result of this work would provide a basic foundation for the further investigation of the quality of end metal component manufactured by

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Zhang, Cai Jun, Dong Mei Tu, and Min Hu. "Influence of Titanium Compounds on Melting and Crystalline Temperature of Mold Powder." Advanced Materials Research 284-286 (July 2011): 1111–14. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.1111.

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Influence of TiN(0.5%~2.5%) and TiO2(1%~5%) on melting and crystalline temperature have been studied and analyzed in ferritic stainless steel containing titanium mold powder. The results show that with the increasing TiN content from 0.5% to 2.5%, the melting and crystallization temperature of mold power change between 1053~1082°C and 951~981°C respectively. With TiO2 content from 1% to 2%, the melting temperature is lower from 1066°C to 1047°C. As the content of TiO2 increasing to 5%, melting temperature increases obviously to 1077°C. TiO2 has less effect on the crystallization temperature of

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Upadhyay, Meet, Chad Sinclair, and Daan Maijer. "Effect of powder properties on mesoscale thermal FEM simulations of powder bed additive manufacturing." IOP Conference Series: Materials Science and Engineering 1281, no. 1 (2023): 012013. http://dx.doi.org/10.1088/1757-899x/1281/1/012013.

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Abstract Numerous studies have used FEM simulations to assess the effects of the heat source parameters on the melt pool volume during metal powder bed additive manufacturing. However, considerable debate still exists on how to incorporate the evolution of the thermophysical properties used to describe the powder as it undergoes heating, melting, consolidation and finally solidification. For single layer studies, since powder volume is much smaller compared to the substrate volume, highly detailed, computationally expensive powder property descriptions may not provide a commensurate increase i

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Sato, Naoko, Masaki Ito, Takayuki Izumida, Toru Shimizu, and Shizuka Nakano. "Usability of Ti6Al4V Powder via Hydride-Dehydride Process for Selective Laser Melting Process." Materials Science Forum 879 (November 2016): 1698–702. http://dx.doi.org/10.4028/www.scientific.net/msf.879.1698.

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Spherical powders via gas atomization etc. are recommended for use in SLM, however, the spherical powders are expensive and able to make in limited types of metal materials. Using non-spherical powder in SLM are capable of applying SLM to cheap part production and diversify powder materials for SLM. In this paper, to study the feasibility of using Ti6Al4V milled powder via hydride-dehydride method for SLM, characteristics of powders, powder bed performances, and SLM fabricated samples made from gas atomization powder and milled powder were analyzed and compared. The milled powder which added a

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Vinnakota, Raj K., and Dentcho A. Genov. "Surface plasmon induced enhancement in selective laser melting processes." Rapid Prototyping Journal 25, no. 6 (2019): 1135–43. http://dx.doi.org/10.1108/rpj-06-2018-0146.

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Purpose Selective laser melting (SLM) is an advanced rapid prototyping or additive manufacturing technology that uses high power density laser to fabricate metal/alloy components with minimal geometric constraints. The SLM process is multi-physics in nature and its study requires development of complex simulation tools. The purpose of this paper is to study – for the first time, to the best of the authors’ knowledge – the electromagnetic wave interactions and thermal processes in SLM based dense powder beds under the full-wave formalism and identify prospective metal powder bed particle distri

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Wu, Haihua, Junfeng Li, Zhengying Wei, and Pei Wei. "Effect of processing parameters on forming defects during selective laser melting of AlSi10Mg powder." Rapid Prototyping Journal 26, no. 5 (2020): 871–79. http://dx.doi.org/10.1108/rpj-07-2018-0184.

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Purpose To fabricate a selective laser melting (SLM)-processed AlSi10Mg part with almost full density and free of any apparent pores, this study aims to investigate the effect of ambient argon pressure and laser scanning speed on the particles splash during the AlSi10Mg powder bed laser melting. Design/methodology/approach Based on the discrete element method (DEM), a 3D model of random distribution of powder particles was established, and the 3D free surface of SLM forming process was dynamically tracked by the volume of fluid, where a Gaussian laser beam acts as the energy source melting the

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Foadian, Farzad, Robert Kremer, Matthias Post, Arvin Taghizadeh Tabrizi, and Hossein Aghajani. "Investigation of In-Situ Low Copper Alloying of 316L Using the Powder Bed Fusion Process." Solids 4, no. 3 (2023): 156–65. http://dx.doi.org/10.3390/solids4030010.

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This study investigated the allowability of materials in the laser powder melting process, with a focus on powder mixing as a means of adjusting the material composition quickly and cost-effectively. By mixing different powders, a desired alloy can be created during additive processing without the need to produce new powder, which can be expensive. However, one of the main challenges in this process is the segregation of powders, which can lead to non-homogeneous alloys. To address this challenge, the study examined the use of a single component 316L mixed with 1% and 5% copper powder in the a

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Saprykin, Alexander A., Yuriy P. Sharkeev, Natalya A. Saprykina, and Egor A. Ibragimov. "Surface Formation Mechanisms in Selective Laser Melting of Cobalt-Chromium-Molybdenum Powder." Key Engineering Materials 839 (April 2020): 73–78. http://dx.doi.org/10.4028/www.scientific.net/kem.839.73.

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Selective laser melting (SLM) is a manufacturing technology of metal parts of any shapes with target mechanical properties by means of laser melting. This paper discusses the effect of SLM parameters: laser output power, laser movement velocity, scanning pitch and preheating temperature of a powdered material on surface formation mechanism, namely, its physical configuration when melting cobalt-chromium-molybdenum powdered material Со28Cr3Mo. The study points at structural differences of melted surfaces even under identical process parameters. Several types of surface formation are identified,

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Coe, Hannah G., and Somayeh Pasebani. "Use of Bimodal Particle Size Distribution in Selective Laser Melting of 316L Stainless Steel." Journal of Manufacturing and Materials Processing 4, no. 1 (2020): 8. http://dx.doi.org/10.3390/jmmp4010008.

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Spherical powders with single-mode (D50 = 36.31 µm), and bimodal (D50,L = 36.31 µm, D50,s = 5.52 µm) particle size distribution were used in selective laser melting of 316L stainless steel in nitrogen atmosphere at volumetric energy densities ranging from 35.7–116.0 J/mm3. Bimodal particle size distribution could provide up to 2% greater tap density than single-mode powder. For low laser power (107–178 W), where relative density was <99%, bimodal feedstock resulted in higher density than single-mode feedstock. However, at higher power (>203 W), the density of bimodal-fed components decre

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Lin, Che Yi, Hui Yum Bor, Chao Nan Wei, and Chien Hung Liao. "Compositional Optimization of In718 Superalloy Powder for Additive Manufacturing." Materials Science Forum 941 (December 2018): 2167–72. http://dx.doi.org/10.4028/www.scientific.net/msf.941.2167.

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In this research, a composition optimized In718 superalloy powder suitable for additive manufacturing has been developed by using the vacuum induction melting gas atomization (VIGA) and the powder sieving process. VIGA which combines the vacuum induction melting (VIM) and gas atomization (GA) processes uses high pressure inert gas to atomize the metal melt formed by VIM to form metal droplets. These metal droplets are solidified to form metal powders during the falling process in the atomized chamber. After the sieving process, the mean particle size D50 of the powder is less than 35 μm and th

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Antony, Kurian, and T. Reghunathan Rakeshnath. "Study on selective laser melting of commercially pure titanium powder." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 7 (2018): 1794–807. http://dx.doi.org/10.1177/0954405418798862.

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Laser additive manufacturing processes melt the powder particles using laser beam energy to form solid three-dimensional objects. This article mainly focuses on numerical analysis and experimentation of laser melting of commercially pure titanium powder. Numerical solutions to moving heat source problems were developed, and their influences on process parameters were validated. The energy density has a significant role in laser melting process. The numerical investigation demonstrates the significant effect of laser energy density on laser tracks. The laser power, distribution of powder partic

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Baitimerov, R. M., A. B. Liberzon, and V. I. Mitin. "Selective Laser Melting of Mixed EP648-Alumina Powder." Materials Science Forum 946 (February 2019): 966–71. http://dx.doi.org/10.4028/www.scientific.net/msf.946.966.

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Selective laser melting (SLM) technology makes it possible to produce complex shape metallic and metal-matrix composite (MMC) bulk parts from powder feedstock. This paper is devoted to selective laser melting of mechanically mixed metal (gas atomized EP648 alloy) and ceramic (alumina) powders. Four 10x10x5 mm specimen were successfully manufactured using different process parameters. Obtained MMC specimen were characterized by scanning electron microscopy. A possibility of manufacturing of dense EP648-alumina MMC by SLM using two-component mixed powder was shown

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Feng, Jianqing, Yafeng Lu, Lian Zhou, et al. "The study on melting behavior of precursor powders for powder melting processed YBa2Cu3O7−x superconductors." Physica C: Superconductivity 459, no. 1-2 (2007): 52–55. http://dx.doi.org/10.1016/j.physc.2007.05.001.

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Uhlmann, Eckart, Julian Polte, Janek Maria Fasselt, et al. "A Comparative Evaluation of Powder Characteristics of Recycled Material from Bronze Grinding Chips for Additive Manufacturing." Materials 17, no. 14 (2024): 3396. http://dx.doi.org/10.3390/ma17143396.

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In the manufacturing process of ship propellers, large quantities of grinding chips are generated. These grinding chips result from the finishing of the blade surfaces after the primary casting process of the propeller. The aim of this study was to investigate and compare different preparation processes used to produce chip powders with sufficient powder quality for the additive manufacturing process of directed energy deposition. The preparation of the samples was performed through different sieving, milling and re-melting processes. For the characterization of the prepared samples, powder an

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Eichler, Fabian, Marco Skupin, Laura Katharina Thurn, Susanne Kasch, and Thomas Schmidt. "Operating limits for beam melting of glass materials." MATEC Web of Conferences 299 (2019): 01004. http://dx.doi.org/10.1051/matecconf/201929901004.

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Laser-based Additive Manufacturing (AM) processes for the use of metals out of the powder bed have been investigated profusely and are prevalent in industry. Although there is a broad field of application, Laser Powder Bed Fusion (LPBF), also known as Selective Laser Melting (SLM) of glass is not fully developed yet. The material properties of glass are significantly different from the investigated metallic material for LPBF so far. As such, the process cannot be transferred, and the parameter limits and the process sequence must be redefined for glass. Starting with the characterization of gl

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Lykov, P. A., and R. M. Baitimerov. "Selective Laser Melting of AlSi12 Powder." Solid State Phenomena 284 (October 2018): 667–72. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.667.

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Additive manufacturing (AM) technologies make it possible to produce complex shape metallic objects from powder feedstock. AlSi12 alloy is one of the most widely used materials in selective laser melting (SLM). The large number of technological parameters involved complicate the selection of an SLM mode for obtaining a product with the required structure. The goal of this research was to determine the mode which ensures the material’s low porosity. Nine specimens were fabricated by using different SLM process parameters. The fabricated specimens have different microstructures. The lowest poros

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Yap, Chor Yen, Hongyi Kenneth Tan, Zhenglin Du, Chee Kai Chua, and Zhili Dong. "Selective laser melting of nickel powder." Rapid Prototyping Journal 23, no. 4 (2017): 750–57. http://dx.doi.org/10.1108/rpj-01-2016-0006.

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Purpose Selective laser melting (SLM) is an additive manufacturing technology that is gaining industrial and research interest as it can directly fabricate near full density metallic components. The paper aims to identify suitable process parameters for SLM of processing of pure nickel powder and to study the microstructure of such products. The study also aims to characterize the microhardness and tensile properties of pure nickel produced by SLM. Design/methodology/approach A 24 factorial design experiment was carried out to identify the most significant factors on the resultant porosity of

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Kobashi, Makoto, and Naoyuki Kanetake. "Morphological Control of Porous Structure in Al-Ti Intermetallics Foam Manufactured by Reactive Precursor Process." Materials Science Forum 794-796 (June 2014): 790–95. http://dx.doi.org/10.4028/www.scientific.net/msf.794-796.790.

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In this paper, a novel processing method (reactive precursor method) to manufacture high-melting point porous Al-Ti intermetallics is investigated. Especially, morphological control of porous structure is focused. In the reactive precursor process, precursors are made by blending aluminum and titanium powders. The precursor is heated to ignite an exothermic reaction (so called “combustion reaction”) between the elemental powders. Pore formation is a well-known intrinsic feature of the combustion reaction, and we tried to control the pore morphology. Fundamentally, the closed-cell structure can

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Wang, Yan Yan, Chang Ling Zhou, Chong Hai Wang, Rui Xiang Liu, Xi Zhu Lin, and Hong Zhao Xu. "The Effect of Different Preparation Methods on the Microstructure of Zirconium Diboride Ceramic Powder." Advanced Materials Research 624 (December 2012): 9–12. http://dx.doi.org/10.4028/www.scientific.net/amr.624.9.

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The melting point of zirconium diboride is up to 3245 ° C. It is concerned widespread as a high-temperature structural materials because of high melting point, high hardness, excellent electrical conductivity and good thermal conductivity. In this paper zirconium diboride powder was prepared by the carbothermic reduction and precursor pyrolysis. XRD, SEM and DTA were used to characterize the performance of the two powders. Results show that the median diameter of zirconium diboride powder prepared by solid phase is about 6μm, round in shape, is not conducive to the sintering. Zirconium diborid

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Campanelli, Sabina Luisa, Nicola Contuzzi, Paolo Posa, and Andrea Angelastro. "Printability and Microstructure of Selective Laser Melting of WC/Co/Cr Powder." Materials 12, no. 15 (2019): 2397. http://dx.doi.org/10.3390/ma12152397.

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The selective laser melting process is a growing technology for the manufacture of parts with very complex geometry. However, not all materials are suitable for this process, involving rapid localized melting and solidification. Tungsten has difficulties due to the high melting temperature. This study focuses on the possibility of processing a WC/Co/Cr composite powder using selective laser melting. Samples were fabricated and characterized in terms of density, defects, microstructure and hardness. Tests were conducted with hatch spacing of 120 μm and process speed of 40 mm/s. A constant laser

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Smykova, Polina, Aleksey Ishkov, Alexander Katasonov, et al. "Registration of melting temperature at phase boundaries in melting powder mixtures." Journal of Physics: Conference Series 2697, no. 1 (2024): 012048. http://dx.doi.org/10.1088/1742-6596/2697/1/012048.

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Abstract An integral constituent of the induction surfacing process for parts hardening pertains to the thermal treatment of rigid alloy particulates and the flux contained within the surfacing amalgam. This scholarly exposition delineates the outcomes of a comprehensive investigation, oriented towards the quantification and simulation of thermal gradients at interphase boundaries within intricate amalgamations of melting and thermosetting powdery substrates. In order to monitor the thermal dynamics during induction surfacing, the application of the CA-microthermocouple methodology and the the

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Jeon, Tae, Tae Hwang, Hye Yun, Chester VanTyne, and Young Moon. "Control of Porosity in Parts Produced by a Direct Laser Melting Process." Applied Sciences 8, no. 12 (2018): 2573. http://dx.doi.org/10.3390/app8122573.

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Recent advances in direct laser melting (DLM) have demonstrated its great potential for manufacturing three-dimensional porous metal parts. Various combinations of powder layering and processing parameters can be set to adjust the porous properties of the final parts. This study presents the effects of powder morphologies and process parameters on porosity formation during DLM. Four types of Fe-powders composed of spherical or non-spherical particles with different sizes were experimentally investigated. Furthermore, the laser processing parameters, such as laser energy density, laser focus, a

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Shakirov, I. V., Yu M. Markova, and D. M. Anisimov. "Optimal parameters for selective laser melting of various steel powders." Journal of Physics: Conference Series 2182, no. 1 (2022): 012079. http://dx.doi.org/10.1088/1742-6596/2182/1/012079.

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Abstract The data of mechanical testing of samples manufactured by selective laser melting of powders using the EOSINT M270 unit is systematized. Used powder raw materials of a different chemical composition close to common stainless-steel brands. Melting parameters found to obtain a complex of mechanical properties exceeding the characteristics of monolithic samples.

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Bao, Tao, Yuanqiang Tan, and Yangli Xu. "Mesoscopic Simulation of Core–Shell Composite Powder Materials by Selective Laser Melting." Materials 16, no. 21 (2023): 7005. http://dx.doi.org/10.3390/ma16217005.

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Mechanical ball milling is used to produce multi-materials for selective laser melting (SLM). However, since different powders have different particle size distributions and densities there is particle segregation in the powder bed, which affects the mechanical properties of the printed part. Core–shell composite powder materials are created and used in the SLM process to solve this issue. Core–shell composite powder materials selective laser melting (CS-SLM) has advanced recently, expanding the range of additive manufacturing applications. Heat storage effects and heat transfer hysteresis in

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Tsai, Shu-Yao, Gregory J. Tsay, Chien-Yu Li, Yu-Tzu Hung, and Chun-Ping Lin. "Assessment of Melting Kinetics of Sugar-Reduced Silver Ear Mushroom Ice Cream under Various Additive Models." Applied Sciences 10, no. 8 (2020): 2664. http://dx.doi.org/10.3390/app10082664.

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This study focuses on assessing the effects of various food processing silver ear (Tremella fuciformis) powders in sugar-reduced ice cream through melting kinetic simulation, sensory properties and functional ingredients. T. fuciformis, a natural anti-melting stabilizer in ice cream, has the advantage of functional ingredients. Using 100, 200, and 300 mesh of particle sizes, and then selecting a suitable particle size, those are added to the additive ratios of 0.4, 0.9, and 1.4% T. fuciformis powder to replace fresh T. fuciformis fruit body. Decreased particle size of T. fuciformis powder sign

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Khan, Rehbar, Inayat Rasool, Mohammad Afzal, and Ateeb Ahmad Khan. "Powder Bed Fusion Techniques in Metal 3D Printing: A Review." Applied Mechanics and Materials 922 (August 19, 2024): 67–75. http://dx.doi.org/10.4028/p-ny5hlx.

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The use of 3D printing (additive manufacturing) with metal has grown significantly in demand recently, greatly reducing the time and expense required to produce complex interconnected metal components. This method minimizes material wastage, facilitates material recycling, and eliminates the need for support materials. Among the various Metal Additive Manufacturing techniques, Powder Bed Fusion (PBF) processes stands out as the most prevalent for manufacturing parts. Within the realm of PBF, electron beam melting technique, selective laser sintering technique, and selective laser melting techn

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Ivanova, Tatiana, Miroslav Mashlan, Tomáš Ingr, Hana Doláková, Dmitry Sarychev, and Anna Sedláčková. "Mössbauer Spectroscopy for Additive Manufacturing by Selective Laser Melting." Metals 12, no. 4 (2022): 551. http://dx.doi.org/10.3390/met12040551.

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Selective laser melting (SLM) is a technology of layer-by-layer additive manufacturing using a laser. This technology allows one to get complex-shaped, three-dimensional (3D) specimens directly from metal powder. In this technology, various metal powders are used, including different steels. Stainless steel 1.4404 (CL20ES) and maraging steel 1.2709 (CL50WS) have been investigated. The surface of samples manufactured from CL20ES and CL50WS powders by SLM (with and without combination sandblasting and annealing) was studied by conversion X-ray Mössbauer spectroscopy (CXMS) and conversion electro

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Alamri, Nawaf Mohammad H. "A Review on Powder Bed Fusion Process and Smart Manufacturing Technologies." International Journal of Current Engineering and Technology 11, no. 05 (2021): 500–501. http://dx.doi.org/10.14741/ijcet/v.11.5.1.

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Powder bed fusion (PBF) processes are laser-based additive manufacturing in which the laser beam scans the selected locations of powder bed at a controlled speed and then it fuses the powder to the solid material by either partial melting in selective laser sintering (SLS) or full melting in selective laser melting (SLM). The aim of this paper is to present a review about PBF showing its way of working, parameters and open issues. In addition, the paper shows the current smart manufacturing that optimize the processes.

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Zagabathuni Rahul Sankrutyayan, Kadapana Pavan Kumar Reddy, and Y. Rameswara Reddy. "Preparation of 316L stainless steel by using laser powder bed fusion technique." World Journal of Advanced Engineering Technology and Sciences 14, no. 2 (2025): 030–35. https://doi.org/10.30574/wjaets.2025.14.2.0030.

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The laser powder bed fusion is an additive manufacturing process which uses powdered metal in order to create complex shapes, it uses lasers for melting the metal powders. In this a bio-medical grade metal powder is used i.e., SS 316L by using iFusion 150 metal 3D printing machine, it uses Yb – Fibre laser in order to melt the SS 316L powder to the required shapes. The iFusion 150 metal 3D printer uses laser powder bed fusion (LPBF) technology. Mechanical properties like compression strength, micro hardness was examined and found an average of 1340.697 MPa compression strength, 206 BHN hardnes

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Huang, Sheng, Swee Leong Sing, and Wai Yee Yeong. "Selective Laser Melting of Ti42Nb Composite Powder and the Effect of Laser Re-Melting." Key Engineering Materials 801 (May 2019): 270–75. http://dx.doi.org/10.4028/www.scientific.net/kem.801.270.

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Ti-Nb based alloys have the potential to be used as structural implant materials due to their excellent bio-compatibility and ability to reduce stress shielding. The idea to additively manufacture Ti-Nb based alloys using selective laser melting (SLM) technology can further improve the resultant implant quality. However, the lack of economically sound and readily available pre-alloyed powder has pushed for the usage of composite powder as a means to hasten research pace in fabricating new alloy systems via SLM. The usage of Ti-Nb composite powder can lead to several problems, particularly the

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Sing, Swee Leong, Wai Yee Yeong, Florencia Edith Wiria, et al. "Direct selective laser sintering and melting of ceramics: a review." Rapid Prototyping Journal 23, no. 3 (2017): 611–23. http://dx.doi.org/10.1108/rpj-11-2015-0178.

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Purpose This paper aims to provide a review on the process of additive manufacturing of ceramic materials, focusing on partial and full melting of ceramic powder by a high-energy laser beam without the use of binders. Design/methodology/approach Selective laser sintering or melting (SLS/SLM) techniques are first introduced, followed by analysis of results from silica (SiO2), zirconia (ZrO2) and ceramic-reinforced metal matrix composites processed by direct laser sintering and melting. Findings At the current state of technology, it is still a challenge to fabricate dense ceramic components dir

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