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Journal articles on the topic 'And SLM technologies'

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Published: 4 June 2021

Last updated: 4 February 2022

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1

Ewunetu, Alelgn, Belay Simane, Ermias Teferi, and Benjamin F. F. Zaitchik. "Relationships and the Determinants of Sustainable Land Management Technologies in North Gojjam Sub-Basin, Upper Blue Nile, Ethiopia." Sustainability 13, no. 11 (2021): 6365. http://dx.doi.org/10.3390/su13116365.

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Sustainable land management (SLM) is a leading policy issue in Ethiopia. However, the adoption and continuous use of SLM technologies remain low. This study investigates the interrelationship of adopted SLM technologies and key factors of farmers’ decisions to use SLM technologies in the North Gojjam sub-basin of the Upper Blue Nile. The study was based on the investigation of cross-sectional data obtained from 414 randomly selected rural household heads, focus group discussions, and key informant interviews. Descriptive statistics and Econometric models (i.e., Multivariate Probit and Poisson

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Schwilch, G., F. Bachmann, and J. de Graaff. "Decision support for selecting SLM technologies with stakeholders." Applied Geography 34 (May 2012): 86–98. http://dx.doi.org/10.1016/j.apgeog.2011.11.002.

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Zhang, Xuanpu, Zhihan Wang, Shi Liu, et al. "Development of Single-Longitudinal-Mode Selection Technology for Solid-State Lasers." International Journal of Optics 2021 (July 28, 2021): 1–13. http://dx.doi.org/10.1155/2021/6667015.

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Lasers with narrow linewidths and single frequencies are widely used in fields such as radar detection, nonlinear optics, and precision measurements. The demand for such lasers has promoted the rapid development of single-longitudinal-mode (SLM) selection technology. Here, we highlight the working principles of current mainstream SLM selection technologies and the recent advances in the field. We compare the characteristics of different SLM selection methods and list the challenges faced by these technologies.

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Kostevsek, Urska, Tomaz Brajlih, Joze Balic, Žiga Kadivnik, and Igor Drstvensek. "Development of productivity estimation model for mass-customized production by selective laser melting." Rapid Prototyping Journal 24, no. 3 (2018): 670–76. http://dx.doi.org/10.1108/rpj-06-2017-0120.

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Purpose Fixed structures in prosthetic dentistry are highly customized products, manufactured individually for patients who have missing teeth. When choosing the technology for fixed dental structure manufacturing, three viable options are available (precise casting, milling and selective laser melting [SLM]). All these technologies can be used to produce a dental structure from CoCr alloy. Besides materials and availability of technologies, economic efficiency is an important factor when choosing a production method. The purpose of this study is to develop an estimation model for achievable p

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Merkt, Simon, Christian Hinke, Henrich Schleifenbaum, and Holger Voswinckel. "Integrative Technology Evaluation Model (ITEM) for Selective Laser Melting (SLM)." Advanced Materials Research 337 (September 2011): 274–80. http://dx.doi.org/10.4028/www.scientific.net/amr.337.274.

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This paper focuses on the evaluation of manufacturing processes that are competing with Selective Laser Melting (SLM). In 3D-part production of serial parts SLM is starting to be an economic choice for manufacturing. An integrated technology evaluation model (ITEM) is presented that helps decision makers to determine the potential of SLM while comparing with conventional manufacturing technologies. In contrast to conventional evaluation methodologies the ITEM considers interactions between product and process innovations generated by SLM. The paper closes with a technical and economical evalua

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Salau, Shehu, Robiu Aliu, and Nofiu Nofiu. "The effect of sustainable land management technologies on farming household food security in Kwara state, Nigeria." Journal of Agricultural Sciences, Belgrade 64, no. 2 (2019): 203–14. http://dx.doi.org/10.2298/jas1902203s.

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Nigeria is among countries of the world confronted with the food insecurity problem. The agricultural production systems that produce food for the teeming population are not sustainable. Consequently, the use of Sustainable Land Management (SLM) technologies becomes a viable option. This study assessed the effect of SLM technologies on farming households? food security in Kwara State, Nigeria. A random sampling technique was used to pick 200 farming households for this study. The analytical tools included descriptive statistics, Shriar index, Likert scale, food security index and logistic regr

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Aurich, J. C., and M. Burkhart. "Qualität steigern mit Selective Laser Melting/Quality improvement with selective laser melting – An approach to manage requirements with additive manufacturing." wt Werkstattstechnik online 105, no. 11-12 (2015): 793–97. http://dx.doi.org/10.37544/1436-4980-2015-11-12-33.

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Additive Manufacturing (AM) ist der Überbegriff für unterschiedliche Fertigungsverfahren, welche durch das schichtweise Aufbringen von Werkstoff die Herstellung von Bauteilen ermöglichen. Selective Laser Melting (SLM) ist ein additives Fertigungsverfahren zur Herstellung von Produkten mit hoher Detailgenauigkeit und Designfreiheit. Der Fachbeitrag stellt ein Konzept vor, bei dem durch systematisches Vorgehen untersucht wird, ob Produktanforderungen mit SLM besser erfüllt werden können als mit konventionellen Fertigungsverfahren. &nbsp; Additive Manufacturing (AM) is the term for various ma

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Löber, Lukas, Christoph Flache, Romy Petters, Uta Kühn, and Jürgen Eckert. "Comparison of different post processing technologies for SLM generated 316l steel parts." Rapid Prototyping Journal 19, no. 3 (2013): 173–79. http://dx.doi.org/10.1108/13552541311312166.

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Kugaevskii, Sergey, Eugenius Pizhenkov, and Alexey Gamberg. "The effectiveness of additive SLM-technologies in the manufacture of cutting tools." Materials Today: Proceedings 19 (2019): 1977–81. http://dx.doi.org/10.1016/j.matpr.2019.07.055.

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Deng, Cao, Ruidi Li, Tiechui Yuan, Pengda Niu, and Yin Wang. "Microstructure and Mechanical Properties of a Combination Interface between Direct Energy Deposition and Selective Laser Melted Al-Mg-Sc-Zr Alloy." Metals 11, no. 5 (2021): 801. http://dx.doi.org/10.3390/met11050801.

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Selective laser melting (SLM) and direct energy deposition (DED) are two widely used technologies in additive manufacturing (AM). However, there are few studies on the combination of the two technologies, which can synthetically combine the advantages of the two technologies for more flexible material design. This paper systematically studies the Al-Mg-Sc-Zr alloy by combination of SLM and DED with emphasis on its bonding properties, microstructure, and metallurgical defects. It is found that the aluminum alloy prepared by the two methods achieves a good metallurgical combination. The microstr

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Lykov, P. A., and L. A. Glebov. "Characteristics of Powders from Different Aluminum Alloys for Additive Technologies Obtained by Gas Atomization." Solid State Phenomena 316 (April 2021): 564–69. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.564.

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Selective laser melting (SLM) is one of the additive manufacturing technologies that allows us to produce complex shape metallic objects from powder feedstock. Al-alloys are very promising materials in selective laser melting. In this paper, atomized metal powders of various aluminum alloys are investigated: 1) deformable alloys АК4, АК6; 2) cast alloys АК9ph, АК12; 3) deformable hardened alloy D16. As a part of the work, the particle shape, particle size distribution and technical characteristics of the powders were investigated, and also the compliance of materials with the requirements of a

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Rekadze, Pavel, and Leonid Rodionov. "ACOUSTIC PERFORMANCES OF METAL SAMPLES MANUFACTURED BY ADDITIVE TECHNOLOGIES." Akustika, VOLUME 38 (March 2021): 18–26. http://dx.doi.org/10.36336/akustika20213818.

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Porous materials (PMs) have been widely used since the development of powder metallurgy. PM samples are obtained by various methods, while the structure varies from sample to sample. Deviation from a given structure leads to a deviation of the specified properties up to 30%, including acoustic. Selective laser melting (SLM), allows to obtain samples with a low structural deviation (up to 13%) in a wide porosity range P=0.3-0.7. An increase in the sound absorption coefficient and the expansion of the frequency range allows to use such samples in noise reduction units’ designs. Nine samples with

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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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Porojan, Liliana, Mihaela Bîrdeanu, Cristina Savencu, and Sorin Porojan. "Characterization of Dental Metal-Ceramic Interfaces of Heat Pressed Ceramics on Co-Cr Frameworks Obtained with Different Technologies." Applied Mechanics and Materials 876 (February 2018): 25–30. http://dx.doi.org/10.4028/www.scientific.net/amm.876.25.

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It is known that the quality of metal-ceramic restorations mainly depends on the interface strength. The aim of the study was to evaluate metal–ceramic interfaces of heat pressed ceramic on Co-Cr frameworks obtained with different technologies: melting-casting (CST), computerized milling (MIL), selective laser sintering (SLS) and selective laser melting (SLM). The microstructure of metal–ceramic interfaces and framework topography were characterized by scanning electron microscope (SEM). Sandblasted, polished surfaces and the cross section on the interfaces were observed. Sandblasted surfaces

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Wang, Zhi Gang, Yu Sheng Shi, Rui Di Li, Qing Song Wei, and Jin Hui Liu. "Manufacturing AISI316L Components via Selective Laser Melting Coupled with Hot Isostatic Pressing." Materials Science Forum 675-677 (February 2011): 853–56. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.853.

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Selective laser melting (SLMing) is a new advanced material processing technology which is used in fabricating parts with complex shape. Hot isostatic pressing (HIPing) is a manufacture technology which forms parts by imposing high heat and pressure on metal powders or semi-manufactured parts. Considering the advantages of both the technologies, they can be combined to produce higher-quality parts free from the limitation of the shape of parts. AISI316L stainless steel is widely used in manufacturing varies of complex metal parts. In this research, three AISI316L stainless steel samples with d

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Parhi, P. K. "Supported Liquid Membrane Principle and Its Practices: A Short Review." Journal of Chemistry 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/618236.

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The present paper on the supported liquid membrane (SLM) deals with the general principles and applications, followed by the uphill transportation characteristic of SLM. The liquid-liquid extraction with supported liquid membrane is one of the best alternate and promising technologies for the extraction of metal ions from solutions over other hydrometallurgical separation processes. The salient features of the supported liquid membrane (SLM) technique such as simultaneous extraction and stripping, low solvent inventory, process economy, high efficiency, less extractant consumption, and operati

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Han, Xingting, Tomofumi Sawada, Christine Schille, et al. "Comparative Analysis of Mechanical Properties and Metal-Ceramic Bond Strength of Co-Cr Dental Alloy Fabricated by Different Manufacturing Processes." Materials 11, no. 10 (2018): 1801. http://dx.doi.org/10.3390/ma11101801.

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Cobalt-chromium (Co-Cr) alloy is a widely used base material for dental fixed prostheses. These restorations can be produced through casting technique, subtractive or additive manufacturing technologies. However, limited information is available regarding the influence of manufacturing techniques on the properties of Co-Cr alloy since most studies used different chemical compositions of Co-Cr alloy for different manufacturing methods. This study compares the mechanical properties, metal-ceramic bond strength, and microstructures of specimens produced by casting, milling, and selective laser me

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Ashraf, Shahzad, Zeeshan A. Arfeen, Muhammad A. Khan, and Tauqeer Ahmed. "SLM-OJ: Surrogate Learning Mechanism during Outbreak Juncture." International Journal for Modern Trends in Science and Technology 6, no. 5 (2020): 162–67. http://dx.doi.org/10.46501/ijmtst060525.

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During epidemic outbreak it is hard to continue formal leaning and training routines specially when whole world is facing corona virus fistula. It is crucial to identify and share the best practices and innovations to enable teaching and learning to take place during outbreak juncture. This will reinforce the basis for more sustainable and balanced schooling solutions as the crisis decreases. The biggest solution to cuts of schools is to plunge into cyberspace and distance learning, establishing a symbiosis between humans and the computers. Ideally, specific contents, learning outcomes, and a

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Fieger, Thiemo Valentin, Maximilian Ferdinand Sattler, and Gerd Witt. "Developing laser beam welding parameters for the assembly of steel SLM parts for the automotive industry." Rapid Prototyping Journal 24, no. 8 (2018): 1288–95. http://dx.doi.org/10.1108/rpj-12-2016-0204.

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Purpose This paper aims to identify issues with joining selective laser melting (SLM) steels with conventional cold rolled steels through remote laser beam welding. Design/methodology/approach A novel approach for substituting conventional cold rolled metal sheets with SLM metal sheets, made of 316L and 18-Ni 300, is presented. The characteristics of the interaction of wrought and SLM materials are described, and joining benchmark parameters are presented and compared to known existing joining results. Finally, the joints are assessed in line with automotive specifications. This research also

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Razavykia, Abbas, Eugenio Brusa, Cristiana Delprete, and Reza Yavari. "An Overview of Additive Manufacturing Technologies—A Review to Technical Synthesis in Numerical Study of Selective Laser Melting." Materials 13, no. 17 (2020): 3895. http://dx.doi.org/10.3390/ma13173895.

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Additive Manufacturing (AM) processes enable their deployment in broad applications from aerospace to art, design, and architecture. Part quality and performance are the main concerns during AM processes execution that the achievement of adequate characteristics can be guaranteed, considering a wide range of influencing factors, such as process parameters, material, environment, measurement, and operators training. Investigating the effects of not only the influential AM processes variables but also their interactions and coupled impacts are essential to process optimization which requires hug

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Pawlak, Andrzej, Patrycja Szymczyk, Grzegorz Ziolkowski, Edward Chlebus, and Bogdan Dybala. "Fabrication of microscaffolds from Ti-6Al-7Nb alloy by SLM." Rapid Prototyping Journal 21, no. 4 (2015): 393–401. http://dx.doi.org/10.1108/rpj-10-2013-0101.

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Purpose – The purpose of this paper is to present the results of theoretical considerations and experimental tests concerning microscaffold fabrication by selective laser melting (SLM). Also described are manufacturing technologies for regular lattice microstructure with the smallest possible pore sizes and fullest possible order of geometric accuracy retained. Process parameters of SLM greatly affect the properties of the fabricated structures not only in regards to their material characteristics but also in their geometric representation accuracy. Design/methodology/approach – The paper disc

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Domanski, Janusz, Konstanty Skalski, Roman Grygoruk, and Adrian Mróz. "Rapid prototyping in the intervertebral implant design process." Rapid Prototyping Journal 21, no. 6 (2015): 735–46. http://dx.doi.org/10.1108/rpj-09-2013-0096.

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Purpose – The purpose of this paper is to present the methodology of a design process of new lumbar intervertebral disc implants with specific emphasis on the use of rapid prototyping technologies. The verification of functionality of artificial intervertebral discs is also given. The paper describes the attempt and preliminary research to evaluate the properties of the intervertebral disc implant prototypes manufactured with the use of different rapid prototyping technologies, i.e. FDM – fused deposition modelling, 3DP – 3D printing and SLM – selective laser melting. Design/methodology/approa

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23

Cao, Liu, and Xuefeng Yuan. "Study on the Numerical Simulation of the SLM Molten Pool Dynamic Behavior of a Nickel-Based Superalloy on the Workpiece Scale." Materials 12, no. 14 (2019): 2272. http://dx.doi.org/10.3390/ma12142272.

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Nickel-based superalloys are one of the most industrially important families of metallic alloys at present. Selective Laser Melting (SLM), as one of the additive manufacturing technologies for directly forming complex metal parts, has been applied in the production of Inconel 718 components. Based on the more reasonable and comprehensive equivalent processing models (vaporization heat loss, equivalent physical parameters) for the nickel-based superalloy SLM process, an SLM molten pool dynamic behavior prediction model on the workpiece scale was established. Related equivalent processing models

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Savencu, Cristina Elena, Costela Șerban, and Liliana Porojan. "Adaptability Evaluation of Metal-Ceramic Crowns Obtained by Additive and Subtractive Technologies." Applied Sciences 10, no. 16 (2020): 5563. http://dx.doi.org/10.3390/app10165563.

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(1) Background: Traditional metal-ceramic restorations are considered as a standard in the evaluation of new technologies. A critical factor in their longevity is represented by their adaptability; The purpose of this study was to evaluate the marginal and internal gap of ceramic-fused to metal crowns with frameworks obtained by additive manufacturing (AM) technologies and the influence of veneering process on their fit; (2) Methods: Metal-ceramic crowns have been produced by conventional lost-wax technology (T), digital milling (F), selective laser sintering (SLS) and selective laser melting

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Riza, Syed H., Ashish M. Ashok, Syed H. Masood, and Igor Sbarski. "Sub-Zero Temperature Effect on Impact Properties of 17-4PH Stainless Steel Processed by Selective Laser Melting." Solid State Phenomena 266 (October 2017): 3–7. http://dx.doi.org/10.4028/www.scientific.net/ssp.266.3.

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The Selective Laser Melting (SLM) process has been proved as the most effective method among Additive Manufacturing (AM) technologies to produce hard, dense and strong metallic structures with intricate shapes and profiles from wide range of metallic alloys. The SLM generated structures from 17-4PH stainless steel high strength alloys involve layer by layer building up through laser melting of successively deposited powder layers. Therefore, the mechanical properties of such structures need to be thoroughly checked and investigated before putting these materials to practical applications. This

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Gladkovskii, Sergey V., Denis Rinatovich Salikhyanov, Vladimir P. Volkov, Yurij A. Avraamov, and Valeriya E. Veselova. "Rheological Properties and Microstructure of PH1 Stainless Steel Produced by Selective Laser Melting." Materials Science Forum 989 (May 2020): 811–15. http://dx.doi.org/10.4028/www.scientific.net/msf.989.811.

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The present study is focused on rheological properties of PH1 stainless steel, produced by selective laser melting (SLM), at temperatures of hot deformation, with the aim to investigate the dependence of strain resistance on temperature and strain degree. The tests of cylindrical specimens, made of PH1 stainless steel, were carried out using a cam plastometer in temperature range 700 – 1200 °C at a strain rate ξ equal to 1 s-1 up to strain degree e equal to 0.8 – 1.2. The paper presents the results of investigation of initial microstructure, microhardness measurement and flow curves of PH1 ste

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Wei, Shanlin, Hui Li, Wei Cheng, Wenjie Zhang, Gang Han, and Weiguang Wang. "Universal Filtered Multi-Carrier System Based on Selective Mapping." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 37, no. 6 (2019): 1257–63. http://dx.doi.org/10.1051/jnwpu/20193761257.

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Internet of things (IoT) and machine-to-machine (M2M) communication are characterized by short periods and bursts. Traditional orthogonal frequency division multiplexing (OFDM) has not meet the demand for such traffic, while IoT and M2M communication will play an important role in the next fifth generation (5G) communication, so it is particularly urgent to study the small packet and low-latency wireless transmission technologies that satisfy IoT and M2M communication. Universal filter multi-carrier (UFMC) is a new kind of filtered wireless transmission mechanism that meets this requirement, b

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Haworth, Barry, John R. Tyrer, and Zhou Zhou. "Selective laser melting using holographic beam manipulation: influence of polypropylene molecular weight." Rapid Prototyping Journal 24, no. 1 (2018): 93–105. http://dx.doi.org/10.1108/rpj-08-2016-0134.

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Purpose There is a requirement to match selective laser melting (SLM) technologies to a wider range of polymeric materials, as the existing market for SLM powders is dominated by polyamide PA12. Drivers include the tailoring of physical properties to individual applications or cost reduction. Polypropylene (PP) currently has limited use in SLM; so, this paper aims to explore the potential use of PP materials of varying molecular weight (Mw). Design/methodology/approach PP polymers of differing Mw were characterised using a range of analytical techniques, including differential scanning calorim

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Roudnicka, Michaela, Jiri Bigas, and Dalibor Vojtech. "Tuning Porosity and Mechanical Properties of Ti6Al4V Alloy Additively Manufactured by SLM." Key Engineering Materials 865 (September 2020): 1–5. http://dx.doi.org/10.4028/www.scientific.net/kem.865.1.

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Selective laser melting (SLM), as the main representative of additive manufacturing technologies, has a high variability of process parameters setting, which provides wide possibilities in tuning porosity and mechanical properties of final parts. To ensure a high relative density of SLM parts, thorough process optimization is required. Efforts so far developed in this research area suggest that the optimization is desirable for each machine, material and suitably even for a specific product. As even the adjustment of a specific machine may affect the resulting part quality, we carried out an i

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Kratochvilova, Vendula, Lucie Zemanova, František Vlasic, and Pavel Mazal. "Study of Initial Stages of Fatigue Process in Selective Laser Melting Material Using Acoustic Emission Method." Solid State Phenomena 258 (December 2016): 477–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.258.477.

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This paper deals with the evaluation of the fatigue tests and subsequent analyses of damage processes in selective laser melting (SLM) materials under bending loading. Compared to conventional production technologies (casting, forming and machining), SLM offers a wide range of benefits, e.g. production with no need for expensive molds, very low material waste and the possibility to create complex geometric shapes. The acoustic emission method was used to fully understand the processes which appear in the stages preceding the crack initiation. The fatigue tests at room temperature were conducte

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Sinjab, Faris, Zhiyu Liao, and Ioan Notingher. "Applications of Spatial Light Modulators in Raman Spectroscopy." Applied Spectroscopy 73, no. 7 (2019): 727–46. http://dx.doi.org/10.1177/0003702819834575.

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Advances in consumer display screen technologies have historically been adapted by researchers across the fields of optics as they can be used as electronically controlled spatial light modulators (SLMs) for a variety of uses. The performance characteristics of such SLM devices based on liquid crystal (LC) and digital micromirror device (DMD) technologies, in particular, has developed to the point where they are compatible with increasingly sensitive instrumental applications, for example, Raman spectroscopy. Spatial light modulators provide additional flexibility, from modulation of the laser

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Pacurar, Razvan, and Petru Berce. "Research on How Lens Position of the Optical System is Influencing the Mechanical Characteristics of the Metallic Parts Made by Selective Laser Melting Equipment." Advanced Engineering Forum 8-9 (June 2013): 285–92. http://dx.doi.org/10.4028/www.scientific.net/aef.8-9.285.

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The Selective Laser Melting (SLM) is one of the most important Additive Manufacturing (AM) technologies that have been developed in the last few years, with applications in different domains, starting with the industrial engineering and ending with biomedical industry, as well. According to the type of the application (industrial or medical), the challenges and requirements related to this modern technology are different, regarding the mechanical properties of the manufactured parts. The article presents the theoretical and experimental research that was made by the authors in order to improve

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BOJKO, Łukasz, Wojciech RYNIEWICZ, Anna M. RYNIEWICZ, Marcin KOT, and Paweł PAŁKA. "THE INFLUENCE OF ADDITIVE TECHNOLOGY ON THE QUALITY OF THE SURFACE LAYER AND THE STRENGTH STRUCTURE OF PROSTHETIC CROWNS." Tribologia 280, no. 4 (2018): 13–22. http://dx.doi.org/10.5604/01.3001.0012.7480.

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Prosthetic crowns reproduce the damaged hard structures of the patient’s own teeth and take over their natural functions, thus securing the correct reconstruction of the stomatognathic system. The aim is to evaluate the crowns for premolars and molars produced by casting, milling, and Selective Laser Melting technologies, in terms of the accuracy of reproducing the degree against the prosthetic pillar, the analysis of the surface layer structure of the step, and the micromechanical parameters of the alloy. The study material included CoCrMo alloy crowns. The conducted study allowed finding tha

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Ilyuschanka, A. Ph. "INVESTIGATION OF CHARACTERISTICS OF SPECIAL POWDERS AND MATERIALS PRODUCED BY MEANS OF SELECTIVE LASER MELTING." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 63, no. 2 (2018): 150–60. http://dx.doi.org/10.29235/1561-8358-2018-63-2-150-160.

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The article presents the results of characterization of special powders of metal alloys and materials produced from these powders by selective laser melting (SLM), including comparative analysis of powders produced using VIGA technology. It is noted the importance of a complex study that includes not only a statistical evaluation of particle size distribution of the powders (preferably, by the method of laser diffraction), but also image analysis providing information on the particles’ shape influencing the powders’ flowability. It is shown that the size distribution and shape metrics for nick

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Frkan, Martin, Radomila Konecna, and Gianni Nicoletto. "Influence of the Heat Treatment on the Microstructure, Mechanical Properties and Fatigue Behavior of Additively Manufactured Ti6Al4V Alloy." Communications - Scientific letters of the University of Zilina 20, no. 4 (2018): 52–57. http://dx.doi.org/10.26552/com.c.2018.4.52-57.

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This contribution deals with the selective laser melting (SLM), which is one of the additive manufacturing (AM) technologies enabling the production of complex parts from metal powder, layer-by-layer wise. This technology uses laser as source of energy to melt a powder to compact state. Properties of final products can be significantly influenced by the process parameters and post-fabricated heat treatments. The purpose of this study is to determine the effect of a heat treatment on properties of the Ti6Al4V alloy specimens manufactured by Eosint M280 machine by the SLM. Three sets of specimen

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Аджамский, Сергей Викторович. "РЕАЛИЗАЦИЯ SLM - ТЕХНОЛОГИИ ДЛЯ ИЗГОТОВЛЕНИЯ ОБРАЗЦОВ ИЗ ЖАРОПРОЧНОГО СПЛАВА INCONEL 718, ПРИМЕНЯЕМОГО В АВИАЦИОННО-КОСМИЧЕСКОЙ ТЕХНИКЕ". Aerospace technic and technology, № 2 (22 квітня 2019): 69–75. http://dx.doi.org/10.32620/aktt.2019.2.09.

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The new production method, called additive technologies, is a method with the ability to produce 3D products in layers. One of the most widely used methods for the additive production of metal products is selective laser melting. To melt the metal in the form of a powder, use a ytterbium fiber laser with a power of 200 to 1000 W, the radiation of which with the help of mirrors on a high-speed drive is focused to the required place. The subject of research was the possibility of creating products from the heat-resistant alloy INCONEL 718 by the method of layer-by-layer fusion on the equipment p

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Sorci, Roberto, Oriana Tassa, Alessandro Colaneri, et al. "Design of an Innovative Oxide Dispersion Strengthened Al Alloy for Selective Laser Melting to Produce Lighter Components for the Railway Sector." Journal of Materials Engineering and Performance 30, no. 7 (2021): 5184–94. http://dx.doi.org/10.1007/s11665-021-05693-5.

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AbstractThe railway industry can take advantage of additive manufacturing (AM) processes from several perspectives such as the production of spare parts on-demand or the use of lightweight structures for vibration and noise control. One of the key issues regarding the limitations of using these technologies is the scarcity of processable material types. Selective laser melting (SLM) is a metal AM process with industrial maturity where material development can open new prospects for the railway industry. In order to respond to such requirements, this study proposes a framework to study a new ma

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Esarte, Jesús, Jesús M. Blanco, Angela Bernardini, and Ramón Sancibrián. "Performance Assessment of a Three-Dimensional Printed Porous Media Produced by Selective Laser Melting Technology for the Optimization of Loop Heat Pipe Wicks." Applied Sciences 9, no. 14 (2019): 2905. http://dx.doi.org/10.3390/app9142905.

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The primary wick in a loop heat pipe device is a key component that is central to the operation of the device. Both high permeability and capillary pumping capacity, two properties highly dependent on wick structure, are strongly desirable for a satisfactory thermal performance. In this paper, selective laser melting (SLM), a three-dimensional (3D) printing technology, is used to create a primary wick for an 80 W heat transfer application. The permeability and capillarity values of this wick, experimentally measured, are compared with those built with the most widely used technologies nowadays

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Akram, Javed, Deepankar Pal, and Brent Stucker. "Establishing Flow Stress and Elongation Relationships as a Function of Microstructural Features of Ti6Al4V Alloy Processed using SLM." Designs 3, no. 2 (2019): 21. http://dx.doi.org/10.3390/designs3020021.

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Selective laser melting (SLM) is an attractive technology for fabricating complex metal parts with reduced number of processing steps compared to traditional manufacturing technologies. The main challenge in its adoption is the variability in mechanical property produced through this process. Control and understanding of microstructural features affected by the SLM process is the key for achieving desirable mechanical properties. Numerous studies have been published related to microstructure and mechanical properties of SLM printed parts; however, few of those reported end-to-end process–struc

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Santhosh, N. Sai. "SLM Technique to Reduce PAPR and Improve BER in OFDM Systems." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 5138–43. http://dx.doi.org/10.22214/ijraset.2021.36115.

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Through the combined use of multiple input, multiple output, and orthogonal frequency division multiplexing technologies, mankind has achieved a huge leap in the data rate of gigabit per second with the birth of 5G wireless technology. With frequency selective fading, multiple (OFDM MIMO) is possible. One of its most important performance concerns is PAPR (Peak-to-Average Power Ratio), which renders OFDM particularly vulnerable to harmonic distortion, reducing channel estimation accuracy and resulting in a lower bit error rate (BER). We propose a selective codeword shift mapping method for the

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Tawfik, Ahmed, Mohamed Radwan, Mazen Ahmed Attia, Paul Bills, Radu Racasan, and Liam Blunt. "The Detection of Unfused Powder in EBM and SLM Additive Manufactured Components." International Journal of Automation Technology 14, no. 6 (2020): 1025–35. http://dx.doi.org/10.20965/ijat.2020.p1025.

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Additive manufacturing (AM) is recognized as a core technology for producing high value, complex, and individually designed components as well as prototypes, giving AM a significant advantage over subtractive machining. Selective laser melting (SLM) or electron beam melting (EBM) are two of the main technologies used for producing metal components. The powder size varies, depending on the technology and manufacturer, from 20–50 μm for SLM and 45–100 μm for EBM. One of the current barriers for implementing AM for most industries is the lack of build repeatability and a deficit in quality assura

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Uzan, Naor Elad, Roni Shneck, Ori Yeheskel, and Nachum Frage. "High-temperature mechanical properties of AlSi10Mg specimens fabricated by additive manufacturing using selective laser melting technologies (AM-SLM)." Additive Manufacturing 24 (December 2018): 257–63. http://dx.doi.org/10.1016/j.addma.2018.09.033.

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Porojan, Liliana, Mihaela Birdeanu, Cristina Savencu, and Sorin Porojan. "Surface Characteristics and Corrosion Properties of Co-Cr Dental Alloys Processed by Laser-based Methods." Revista de Chimie 68, no. 11 (2017): 2538–41. http://dx.doi.org/10.37358/rc.17.11.5923.

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Technological developments have led to the implementation of novel digitalized manufacturing methods for the production of metallic structures in prosthetic dentistry, less studied to date. The objective of the study was to assess the morphological characteristics and corrosion properties of selective laser sintered (SLS) and selective laser melted (SLM) cobalt�chromium (Co�Cr) dental alloys related to the surface processing and pH variations. For the experimental analyses metallic specimens made of Co-Cr dental alloys were prepared using SLS and SLM, as indicated by the manufacturers. The mor

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Lyczkowska-Widlak, Edyta, Pawel Lochynski, Ginter Nawrat, and Edward Chlebus. "Comparison of electropolished 316L steel samples manufactured by SLM and traditional technology." Rapid Prototyping Journal 25, no. 3 (2019): 566–80. http://dx.doi.org/10.1108/rpj-03-2018-0060.

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Purpose This paper aims to present the way of modifying surfaces of 316L stainless steel elements that were manufactured in the selected laser melting (SLM) technology and then subjected to mechanical and electrolytic processing (electropolishing [EP]). The surface of the as-generated and commercial produced parts was modified by grinding and EP, and the results were compared. The authors also present an example of the application of EP for the final processing of a sample technological model – an initial prototype of a 316L steel implant manufactured in the SLM technology. Design/methodology/

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Trevisan, Francesco, Flaviana Calignano, Alberta Aversa, et al. "Additive manufacturing of titanium alloys in the biomedical field: processes, properties and applications." Journal of Applied Biomaterials & Functional Materials 16, no. 2 (2017): 57–67. http://dx.doi.org/10.5301/jabfm.5000371.

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The mechanical properties and biocompatibility of titanium alloy medical devices and implants produced by additive manufacturing (AM) technologies – in particular, selective laser melting (SLM), electron beam melting (EBM) and laser metal deposition (LMD) – have been investigated by several researchers demonstrating how these innovative processes are able to fulfil medical requirements for clinical applications. This work reviews the advantages given by these technologies, which include the possibility to create porous complex structures to improve osseointegration and mechanical properties (b

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Buican, George Răzvan, Gheorghe Oancea, and Alexandru Manolescu. "Remanufacturing of Damaged Parts Using Selective Laser Melting Technology." Applied Mechanics and Materials 693 (December 2014): 285–90. http://dx.doi.org/10.4028/www.scientific.net/amm.693.285.

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This paper presents the stages taken to remanufacture a damaged part, for which no documentation is available, using the SLM additive technologies. A damaged part is scanned using the COMET L3D scanner and the points cloud is used to redesign and reconstruct the part as a 3D CAD model. Using the generated 3D CAD model the build job for the SLM is created by designing and adding the construction supports, the material type and the type of hatching strategy for each slice. The slices are used by the SLM250HL equipment and the new metallic part is manufactured. The manufactured part was scanned w

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Li, Shi-Qiang, Xuewu Xu, Rasna Maruthiyodan Veetil, Vytautas Valuckas, Ramón Paniagua-Domínguez, and Arseniy I. Kuznetsov. "Phase-only transmissive spatial light modulator based on tunable dielectric metasurface." Science 364, no. 6445 (2019): 1087–90. http://dx.doi.org/10.1126/science.aaw6747.

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Rapidly developing augmented reality, solid-state light detection and ranging (LIDAR), and holographic display technologies require spatial light modulators (SLMs) with high resolution and viewing angle to satisfy increasing customer demands. Performance of currently available SLMs is limited by their large pixel sizes on the order of several micrometers. Here, we propose a concept of tunable dielectric metasurfaces modulated by liquid crystal, which can provide abrupt phase change, thus enabling pixel-size miniaturization. We present a metasurface-based transmissive SLM, configured to generat

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Syed-Khaja, Aarief, Jonathan Stecher, Alireza Esfandyari, Sven Kreitlein, and Jörg Franke. "Energy Efficient Manufacturing of Power Electronics Substrates through Selective Laser Melting Technology." Applied Mechanics and Materials 856 (November 2016): 188–94. http://dx.doi.org/10.4028/www.scientific.net/amm.856.188.

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In view of rising energy prices, high-energy consumption, and the associated environmental problems, in recent years the focus was shifted on the demand for energy and resource efficiency in the manufacturing sector. In the context of the project ‘PowerSLAM’ under Green Factory Bavaria Project, the feasibility of selective laser melting technology (SLM) for the production of ceramic circuit carriers is investigated. In this paper, an overview on the comparison of the state-of-the-art technologies with SLM technology is given in the perspective of energy and resource consumption. Parallelly the

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Dzhendov, Dzh, Iv Katreva, and Ts Ts. Dikova. "Development of treatment protocol with selective laser melted fixed partial dentures." Archives of Materials Science and Engineering 2, no. 90 (2018): 68–73. http://dx.doi.org/10.5604/01.3001.0012.0664.

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Purpose: of the present paper is to offer treatment protocol with fixed partial dentures, produced by selective laser melting, including clinical and laboratory parts. Design/methodology/approach: The treatment protocols with selective laser melted fixed partial dentures was developed on the basis of literature survey and our previous research about accuracy and mechanical properties of dental bridges, manufactured by additive technologies. Findings: The treatment protocol with fixed partial dentures, produced by selective laser melting, consisting of clinical and laboratory parts, was develop

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Drexler, Maximilian, Sandra Greiner, Matthias Lexow, Lydia Lanzl, Katrin Wudy, and Dietmar Drummer. "Selective laser melting of polymers: influence of powder coating on mechanical part properties." Journal of Polymer Engineering 38, no. 7 (2018): 667–74. http://dx.doi.org/10.1515/polyeng-2017-0133.

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Abstract For the derivation of part quality increasing process strategies, knowledge about interactions between sub-processes of selective laser melting (SLM) and resulting part properties is necessary. The SLM process consists of three major sub-processes: powder coating, exposure, and material consolidation. According to the interaction of sub-processes, resulting processing conditions during SLM determine the part properties by changing micro structural pore number and distribution. In addition to absolute temperatures, the time-dependency of the thermal fields also influences the porosity

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