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Journal articles on the topic 'Tightness of SLM parts'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Полупан, Антон Сергійович, та Валерій Терентійович Сікульський. "Теоретичне визначення режимів селективного лазерного плавлення для виготовлення деталей з мінімальним рівнем пористості". Aerospace technic and technology, № 2 (25 квітня 2022): 38–46. http://dx.doi.org/10.32620/aktt.2022.2.05.

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The subject of this article is the process of manufacturing parts of aerospace technology by selective laser melting (SLM) using metal powder of heat-resistant alloy Inconel 718. Objectives: to determine the reasonable size of the melt bath in relation to certain process parameters; to examine the level of porosity based on the obtained values of the melt bath; to determine the most acceptable mode of the SLM process. The methods used are mathematical models of optimization and methods for solving nonlinear problems. The simulation took into account such parameters as the power of the laser ra

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Yan, Xiaoling, Xiansheng Xu, and Qinxue Pan. "Study on the Measurement of Stress in the Surface of Selective Laser Melting Forming Parts Based on the Critical Refraction Longitudinal Wave." Coatings 10, no. 1 (2019): 5. http://dx.doi.org/10.3390/coatings10010005.

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Measurement and control of stress in the metal forming layer is the basic problem of selective laser melting (SLM) forming parts. The critical refraction longitudinal (LCR) wave method to test stress in metallic materials has been extensively studied. However, when testing of stress in selective laser melting (SLM) forming parts using this method, some deep-seated regularities of this technology are still not clear. In order to reveal the mechanism of the LCR wave method to measure stress in SLM forming parts, specimens made of 316 L stainless steel were manufactured using meander, stripe, and

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Liu, A., Chee Kai Chua, and Kah Fai Leong. "Properties of Test Coupons Fabricated by Selective Laser Melting." Key Engineering Materials 447-448 (September 2010): 780–84. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.780.

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Selective Laser Melting (SLM) is a popular and promising Additive Manufacturing (AM) technique as it can produce parts with complex internal features with part density close to 100%. However, unprocessed raw SLM fabricated parts have surface roughness issues and the mechanical properties of raw SLM parts without heat treatment are not ideal. The material used to address some of these issues in this research is an Aluminum alloy, AlSi10Mg – a strong and light weight metal. The SLM machine engaged for the test coupons fabrication is M2 Cusing from Concept Laser, Germany, which uses a diode pumpe

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Kiass, E. M., K. Zarbane, and Z. Beidouri. "Process parameters effect on porosity rate of AlSi10Mg parts additively manufactured by Selective Laser Melting: challenges and research opportunities." Archives of Materials Science and Engineering 122, no. 1 (2023): 22–33. http://dx.doi.org/10.5604/01.3001.0053.8844.

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The present study aims to conduct a literature review on the various methods explored to enhance the quality of AlSi10Mg parts manufactured via the Selective Laser Melting (SLM) process. Specifically, the research focuses on identifying strategies for reducing the porosity level in SLM-fabricated AlSi10Mg parts. Considering the highly competitive nature of the market in which SLM technology is employed, improving part quality is necessary to ensure business continuity and maintain a competitive edge.The present study offers a comprehensive examination of the SLM process, particularly emphasisi

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Liu, Jin Hui, Wen Juan Xie, Sheng Bing Xiao, Wei Ling Zhao, and Jia Zhang. "On Formation and Estimation of Pores during Selective Laser Melting of Single-Phase Metal Powders." Advanced Materials Research 338 (September 2011): 94–101. http://dx.doi.org/10.4028/www.scientific.net/amr.338.94.

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Porous metals are applied in many more fields than other porous materials. Pores in porous metal parts manufactured by selective laser melting (SLM) should not be regarded as defects but favorable characters because they are the main composition of porous metal parts. Therefore, fully densification is not the only target in forming metal parts via SLM. The formation mechanism of pores in SLM is studied mathematically in this article, and mathematical model is built to describe the formation mechanism. It is concluded that the shape of pores and the porosity of parts are the function of SLM pro

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Yan, Xiaoling, and Huiwen Fu. "Opportunities and Challenges for Predicting the Service Status of SLM Metal Parts Under Big Data and Artificial Intelligence." Materials 17, no. 22 (2024): 5648. http://dx.doi.org/10.3390/ma17225648.

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Selective laser melting (SLM) technology is a high-end dual-use technology that is implemented in aerospace and medical equipment, as well as the automotive industry and other military and civilian industries, and is urgently needed for major equipment manufacturing and national defense industries. This paper examines the challenges of uncontrollable service states and the inability to ensure service safety of SLM metal parts under nonlinear and complex operating conditions. An overview of the prediction of the service status of SLM metal parts was introduced, and an effective approach solving

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Qiao, Rui, and Xiaoling Yan. "The Characterization of Fatigue Damage of 316L Stainless Steel Parts Formed by Selective Laser Melting with Harmonic Generation Technique." Materials 15, no. 3 (2022): 718. http://dx.doi.org/10.3390/ma15030718.

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Fatigue damage is the main reason for the failure of parts formed by selective laser melting (SLM) technology. This paper presents a high-order, harmonic, and nonlinear ultrasonic testing system for monitoring the generation and evolution of fatigue damage in SLM 316L stainless steel parts. The results demonstrate that the normalized ultrasonic, nonlinear coefficients show a significant dependence on the degree of fatigue damage of the tested specimen and that the normalized, ultrasonic, and nonlinear coefficients are effective in characterizing the degree of fatigue damage in SLM 316L stainle

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Wang, Di, Yang Liu, Yongqiang Yang, and Dongming Xiao. "Theoretical and experimental study on surface roughness of 316L stainless steel metal parts obtained through selective laser melting." Rapid Prototyping Journal 22, no. 4 (2016): 706–16. http://dx.doi.org/10.1108/rpj-06-2015-0078.

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Purpose The purpose of this paper is to provide a theoretical foundation for improving the selective laser melting (SLM) surface roughness. To improve the part’s surface quality during SLM process, the upper surface roughness of SLM parts was theoretically studied and the influencing factors were analyzed through experiments. Design/methodology/approach The characteristics of single track were first investigated, and based on the analysis of single track, theoretical value of the upper surface roughness would be calculated. Two groups of cubic sample were fabricated to validate SLM parts’ surf

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Franz, Peter, Aamir Mukhtar, Warwick Downing, Graeme Smith, and Ben Jackson. "Mechanical Behaviour of Gas Nitrided Ti6Al4V Bars Produced by Selective Laser Melting." Key Engineering Materials 704 (August 2016): 225–34. http://dx.doi.org/10.4028/www.scientific.net/kem.704.225.

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Gas atomized Ti-6Al-4V (Ti64) alloy powder was used to prepare distinct designed geometries with different properties by selective laser melting (SLM). Several heat treatments were investigated to find suitable processing parameters to strengthen (specially to harden) these parts for different applications. The results showed significant differences between tabulated results for heat treated billet Ti64 and SLM produced Ti64 parts, while certain mechanical properties of SLM Ti64 parts could be improved by different heat treatments using different processing parameters. Most heat treatments per

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Giganto, S., S. Martínez, J. Barreiro, and E. Cuesta. "Evaluation of the influence of post-processing on the optical inspection accuracy of additively manufactured parts." IOP Conference Series: Materials Science and Engineering 1193, no. 1 (2021): 012062. http://dx.doi.org/10.1088/1757-899x/1193/1/012062.

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Abstract Optical measurement systems are important techniques for rapid inspecting additively manufactured parts by techniques such as selective laser melting (SLM). Depending on their application, SLM parts require post-processes such as sandblasting or heat treatment, commonly applied in order to improve their surface finish or mechanical properties, respectively. These post-processes modify the parts surface characteristics, and therefore the suitability for optical inspection. This work evaluates the influence of these SLM post-processes on optical inspection. For this, a test part, manufa

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11

Chai, Qing, Chaoxin Jiang, Chunjie Huang, et al. "Printing Cu on a Cold-Sprayed Cu Plate via Selective Laser Melting—Hybrid Additive Manufacturing." Journal of Manufacturing and Materials Processing 7, no. 6 (2023): 188. http://dx.doi.org/10.3390/jmmp7060188.

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The development of the additive manufacturing (AM) technology proffers challenging requirements for forming accuracy and efficiency. In this paper, a hybrid additive manufacturing technology combining fusion-based selective laser melting (SLM) and solid-state cold spraying (CS) was proposed in order to enable the fast production of near-net-shape metal parts. The idea is to fabricate a bulk deposit with a rough contour first via the “fast” CS process and then add fine structures and complex features through “slow” SLM. The experimental results show that it is feasible to deposit an SLM part on

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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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Lin, Zhenqiang, Yiwen Lai, Taotao Pan, et al. "A New Method for Automatic Detection of Defects in Selective Laser Melting Based on Machine Vision." Materials 14, no. 15 (2021): 4175. http://dx.doi.org/10.3390/ma14154175.

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Selective laser melting (SLM) is a forming technology in the field of metal additive manufacturing. In order to improve the quality of formed parts, it is necessary to monitor the selective laser melting forming process. At present, most of the research on the monitoring of the selective laser melting forming process focuses on the monitoring of the melting pool, but the quality of forming parts cannot be controlled in real-time. As an indispensable link in the SLM forming process, the quality of powder spreading directly affects the quality of the formed parts. Therefore, this paper proposes

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14

Akhtar, Maaz, Muhammad Samiuddin, Muhammad Muzamil, et al. "Mechanical Behavior of Selective Laser Melting (SLM) Parts with Varying Thicknesses in a Saline Environment under Different Exposure Times." Materials 17, no. 9 (2024): 1959. http://dx.doi.org/10.3390/ma17091959.

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A promising method for additive manufacturing that makes it possible to produce intricate and personalized parts is selective laser melting (SLM). However, the mechanical properties of as-corroded SLM parts are still areas of concern. This research investigates the mechanical behavior of SLM parts that are exposed to a saline environment containing a 3.5% NaCl solution for varying lengths of time. The exposure times chosen for this study were 10 days, 20 days, and 30 days. The results reveal that the tensile strength of the parts is significantly affected by the duration of exposure. Additiona

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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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Król, M., J. Mazurkiewicz, and S. Żołnierczyk. "Optimization and analysis of porosity and roughness in selective laser melting 316L parts." Archives of Materials Science and Engineering 1, no. 90 (2018): 5–15. http://dx.doi.org/10.5604/01.3001.0012.0607.

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Purpose: The investigations have been carried out on 316L stainless steel parts fabricated by Selective Laser Melting (SLM) technique. The study aimed to determine the effect of SLM parameters on porosity, hardness, and structure of 316L stainless steel. Design/methodology/approach: The analyses were conducted on 316L stainless steel parts by using AM125 SLM machine by Renishaw. The effects of the different manufacturing process parameters as power output, laser distance between the point’s melted metal powder during additive manufacturing as well as the orientation of the model relative to th

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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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Huang, Shuai, Bingqing Chen, Wei Liu, et al. "Effect of Heat Treatment on Microstructure and Properties of GH3536 Fabricated by Selective Laser Melting." Metals 12, no. 7 (2022): 1184. http://dx.doi.org/10.3390/met12071184.

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Selective laser melting (SLM) forming technology to prepare nickel-based superalloy parts can significantly save costs and solve bottleneck problems. The extremely high-temperature gradient and large residual stress during SLM lead to structural defects and compositional segregation. The parts formed by SLM urgently need heat treatment to control the microstructure composition and improve mechanical properties. Results showed that the heat treatment did not significantly change the microcracks and pores in the SLM sample, but the carbides in the grain boundary gradually changed from a granular

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Gao, Bingwei, Hongjian Zhao, Liqing Peng, and Zhixin Sun. "A Review of Research Progress in Selective Laser Melting (SLM)." Micromachines 14, no. 1 (2022): 57. http://dx.doi.org/10.3390/mi14010057.

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SLM (Selective Laser Melting) is a unique additive manufacturing technology which plays an irreplaceable role in the modern industrial revolution. 3D printers can directly process metal powder quickly to obtain the necessary parts faster. Shortly, it will be possible to manufacture products at unparalleled speeds. Advanced manufacturing technology is used to produce durable and efficient parts with different metals that have good metal structure performance and excellent metal thermal performance, to lead the way for laser powder printing technology. Traditional creative ways are usually limit

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Kurnosov, Nikolay, Aleksandr Tarnopol'skiy, and Yuliya Nakashidze. "ENSURING TIGHTNESS IN PRESSURE COUPLING PARTS." Bulletin of Bryansk state technical university 2021, no. 11 (2021): 51–59. http://dx.doi.org/10.30987/1999-8775-2021-11-51-59.

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Work objective is to solve the urgent problem of increasing the tightness and reliability of pressure couplings during their operation under dynamic loads.  Theoretical and experimental studies assessing the impact on the tightness due to roughness nature of mating surfaces and three types of coatings: soft, double-layer and hard have been undertaken. The joints were tested under the influence of axial cyclic load and torque on a bench for accelerated testing. It is established that tightness of pressure couplings during operation under dynamic loads significantly depends on the pa

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Bâlc, Nicolae, Sorin Cosmin Cosma, Julia Kessler, and Voicu Mager. "Research on Improving the Outer Surface Quality of the Parts Made by SLM." Applied Mechanics and Materials 808 (November 2015): 199–204. http://dx.doi.org/10.4028/www.scientific.net/amm.808.199.

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The paper presents an application of the ANOVA method within the Selective Laser Melting (SLM) process. A new mathematical model was developed, to calculate the surface roughness of the SLM parts made from titanium powder, as function of the important SLM parameters: point distance, exposure time and laser power. Preliminary experiments were undertaken according to the Design Experts work plan and the new mathematical formula was tested by further experimental research, to validate the optimized SLM parameters.

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Uhlmann, E., and V. Kashevko. "Oberflächengüte additiv gefertigter Kupferbauteile*/Surface quality of additive copper alloy parts – Investigations to increase the surface quality of top and side faces of SLM-generated CuCr1Zr copper alloy parts." wt Werkstattstechnik online 108, no. 11-12 (2018): 815–20. http://dx.doi.org/10.37544/1436-4980-2018-11-12-75.

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Das Laserstrahlschmelzen (SLM) als additives Fertigungsverfahren ist prädestiniert für die Herstellung von individuellen Bauteilen oder Werkzeugen mit hoher geometrischer Komplexität durch äußere und innenliegende Features in der Einzelstück- und Kleinserienfertigung. Allerdings ist die Oberflächengüte sowohl der Deck- als auch Seitenflächen von SLM-generierten Bauteilen nach dem Fertigungsprozess noch nicht zufriedenstellend, was für die Anwendung, etwa als Werkzeugeinsatz, von immenser Bedeutung ist. Daher ist die Verbesserung der Oberflächenbeschaffenheit von Kupferbauteilen der Schwerpunkt

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Ponnusamy, Panneer, Rizwan Abdul Rahman Rashid, Syed Hasan Masood, Dong Ruan, and Suresh Palanisamy. "Mechanical Properties of SLM-Printed Aluminium Alloys: A Review." Materials 13, no. 19 (2020): 4301. http://dx.doi.org/10.3390/ma13194301.

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Selective laser melting (SLM) is a powder bed fusion type metal additive manufacturing process which is being applied to manufacture highly customised and value-added parts in biomedical, defence, aerospace, and automotive industries. Aluminium alloy is one of the widely used metals in manufacturing parts in SLM in these sectors due to its light weight, high strength, and corrosion resistance properties. Parts used in such applications can be subjected to severe dynamic loadings and high temperature conditions in service. It is important to understand the mechanical response of such products p

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Chen, Tian, Linzhi Wang, and Sheng Tan. "Effects of vacuum annealing treatment on microstructures and residual stress of AlSi10Mg parts produced by selective laser melting process." Modern Physics Letters B 30, no. 19 (2016): 1650255. http://dx.doi.org/10.1142/s0217984916502559.

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Selective laser melting (SLM)-fabricated AlSi10Mg parts were heat-treated under vacuum to eliminate the residual stress. Microstructure evolutions and tensile properties of the SLM-fabricated parts before and after vacuum annealing treatment were studied. The results show that the crystalline structure of SLM-fabricated AlSi10Mg part was not modified after the vacuum annealing treatment. Additionally, the grain refinement had occurred after the vacuum annealing treatment. Moreover, with increasing of the vacuum annealing time, the second phase increased and transformed to spheroidization and c

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Maamoun, Ahmed, Yi Xue, Mohamed Elbestawi, and Stephen Veldhuis. "The Effect of Selective Laser Melting Process Parameters on the Microstructure and Mechanical Properties of Al6061 and AlSi10Mg Alloys." Materials 12, no. 1 (2018): 12. http://dx.doi.org/10.3390/ma12010012.

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Additive manufacturing (AM) offers customization of the microstructures and mechanical properties of fabricated components according to the material selected and process parameters applied. Selective laser melting (SLM) is a commonly-used technique for processing high strength aluminum alloys. The selection of SLM process parameters could control the microstructure of parts and their mechanical properties. However, the process parameters limit and defects obtained inside the as-built parts present obstacles to customized part production. This study investigates the influence of SLM process par

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Kónya, János, Hajnalka Hargitai, Hassanen Jaber, Péter Pinke, and Tünde Anna Kovács. "Effect of Surface Modifications on Surface Roughness of Ti6Al4V Alloy Manufactured by 3D Printing, Casting, and Wrought." Materials 16, no. 11 (2023): 3989. http://dx.doi.org/10.3390/ma16113989.

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This work aimed to comprehensively evaluate the influence of different surface modifications on the surface roughness of Ti6Al4V alloys produced by selective laser melting (SLM), casting and wrought. The Ti6Al4V surface was treated using blasting with Al2O3 (70–100 µm) and ZrO2 (50–130 µm) particles, acid etching with 0.017 mol/dm3 hydrofluoric acids (HF) for 120 s, and a combination of blasting and acid etching (SLA). It was found that the optimization of the surface roughness of Ti6Al4V parts produced by SLM differs significantly from those produced by casting or wrought processes. Experimen

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Maamoun, Ahmed, Yi Xue, Mohamed Elbestawi, and Stephen Veldhuis. "Effect of Selective Laser Melting Process Parameters on the Quality of Al Alloy Parts: Powder Characterization, Density, Surface Roughness, and Dimensional Accuracy." Materials 11, no. 12 (2018): 2343. http://dx.doi.org/10.3390/ma11122343.

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Additive manufacturing (AM) of high-strength Al alloys promises to enhance the performance of critical components related to various aerospace and automotive applications. The key advantage of AM is its ability to generate lightweight, robust, and complex shapes. However, the characteristics of the as-built parts may represent an obstacle to the satisfaction of the parts’ quality requirements. The current study investigates the influence of selective laser melting (SLM) process parameters on the quality of parts fabricated from different Al alloys. A design of experiment (DOE) was used to anal

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Konečná, Radomila, and Gianni Nicoletto. "Near-Surface Structure and Fatigue Crack Initiation Mechanisms of As-Built SLM Inconel 718." Defect and Diffusion Forum 405 (November 2020): 306–11. http://dx.doi.org/10.4028/www.scientific.net/ddf.405.306.

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Challenging structural applications such as customized jet engine parts are increasingly fabricated by Selective Laser Melting (SLM) of Inconel 718 powder. The as-built surface quality of SLM parts is however inferior of the machined version and the fatigue behavior is negatively affected. The as-built fatigue response of SLM Inconel 718 was quantified here using three sets of directional specimens. Since the surface quality is influenced by powder characteristics, process parameters and layer-wise fabrication, fatigue results showed a directional contribution that was interpreted using metall

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Karakılınç, Uçan, Berkay Ergene, Bekir Yalçın, Kubilay Aslantaş, and Ali Erçetin. "Comparative Analysis of Minimum Chip Thickness, Surface Quality and Burr Formation in Micro-Milling of Wrought and Selective Laser Melted Ti64." Micromachines 14, no. 6 (2023): 1160. http://dx.doi.org/10.3390/mi14061160.

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Selective laser melting (SLM) is a three-dimensional (3D) printing process that can manufacture functional parts with complex geometries as an alternative to using traditional processes, such as machining wrought metal. If precision and a high surface finish are required, particularly for creating miniature channels or geometries smaller than 1 mm, the fabricated parts can be further machined. Therefore, micro milling plays a significant role in the production of such miniscule geometries. This experimental study compares the micro machinability of Ti-6Al-4V (Ti64) parts produced via SLM compa

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Bassani, Paola, Carlo Alberto Biffi, Riccardo Casati, Adrianni Zanatta Alarcon, Ausonio Tuissi, and Maurizio Vedani. "Properties of Aluminium Alloys Produced by Selective Laser Melting." Key Engineering Materials 710 (September 2016): 83–88. http://dx.doi.org/10.4028/www.scientific.net/kem.710.83.

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Analysis of peculiar properties offered by Al alloys produced according to additive manufacturing techniques, specifically by Selective Laser Melting (SLM), is carried out. Two alloys are considered, derived by casting (AlSi10Mg) and by wrought (ENAW 2618) applications. The SLM processed samples are investigated considering their microstructural and mechanical properties after SLM and compared to cast and wrought counterparts. A strong microstructural refinement induced by SLM processing is observed for both alloys, resulting in excellent hardness properties. Investigation on integrity of samp

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Liu, Jin Hui, Wen Juan Xie, Qing Song Wei, and Li Wang. "Progress on Investigation of Pores During Selective Laser Melting of Metal Powders and Future Work Discussion." Advanced Materials Research 291-294 (July 2011): 3088–94. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.3088.

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Pores are always considered as a kind of defect during manufacturing metal parts via many conventional processes. But porous metals have outstanding physical and mechanical properties which providing them double natures of function and structure, and are applied in many fields of science and technology. Selective laser melting (SLM), developed within current years, has the advantages of producing metal parts with complex structures, and can be used to manufacture complex structures of any kind theoretically. A new method of making porous complicated metal structures via SLM is put forward. The

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Giganto, Sara, Susana Martínez-Pellitero, Pablo Rodríguez-Mateos, Neetesh Soni, and Joaquín Barreiro García. "Optimization of Sandblasting to Improve the Surface Finish of 17-4PH Parts Manufactured by SLM Using Different Laser Scanning Strategies." Key Engineering Materials 958 (October 5, 2023): 97–103. http://dx.doi.org/10.4028/p-cghz41.

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Great advances have emerged in recent years around additive manufacturing techniques, with an increasing number of different materials (polymers, ceramics, metals). However, metal part manufacturing has always been one of the most demanded in engineering. That is due to its ability to create final functional parts with good mechanical properties. One of the most widely used technique is Selective Laser Melting (SLM). The SLM process uses a laser power source to selectively melt metal powder layer by layer. Typically, this manufacturing technique requires mechanical post-processing operations,

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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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Yan, Xiaoling, Jincheng Pang, and Yanlong Jing. "Ultrasonic Measurement of Stress in SLM 316L Stainless Steel Forming Parts Manufactured Using Different Scanning Strategies." Materials 12, no. 17 (2019): 2719. http://dx.doi.org/10.3390/ma12172719.

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Selective Laser Melting (SLM) technology is a new kind of additive manufacturing technology developed in in the last decade. Measurement and control of stress in metal forming layer is the basic problem of SLM forming parts. Critical Refraction Longitudinal (LCR) wave method was used to measure stress. The acoustic-elastic formulas for measuring stresses in SLM 316L stainless steel forming parts manufactured using meander, stripe, and chess board scanning strategies, respectively, were established based on static load tensile test. The experimental results show that the acoustic time differenc

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Deng, Yong, Zhongfa Mao, Nan Yang, Xiaodong Niu, and Xiangdong Lu. "Collaborative Optimization of Density and Surface Roughness of 316L Stainless Steel in Selective Laser Melting." Materials 13, no. 7 (2020): 1601. http://dx.doi.org/10.3390/ma13071601.

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Although the concept of additive manufacturing has been proposed for several decades, momentum in the area of selective laser melting (SLM) is finally starting to build. In SLM, density and surface roughness, as the important quality indexes of SLMed parts, are dependent on the processing parameters. However, there are few studies on their collaborative optimization during SLM to obtain high relative density and low surface roughness simultaneously in the literature. In this work, the response surface method was adopted to study the influences of different processing parameters (laser power, s

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Baroutaji, Ahmad, Arun Arjunan, James Beal, John Robinson, and Julio Coroado. "The Influence of Atmospheric Oxygen Content on the Mechanical Properties of Selectively Laser Melted AlSi10Mg TPMS-Based Lattice." Materials 16, no. 1 (2023): 430. http://dx.doi.org/10.3390/ma16010430.

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Selective Laser Melting (SLM) is an emerging Additive Manufacturing (AM) technique for the on-demand fabrication of metal parts. The mechanical properties of Selectively Laser Melted (SLMed) parts are sensitive to oxygen concentration within the SLM build chamber due to the formation of oxides, which may lead to various negative consequences. As such, this work explores the influence of SLM atmospheric Oxygen Content (OC) on the macroscopic mechanical properties of SLMed AlSi10Mg bulk material and Triply Periodic Minimal Surface (TPMS) lattices namely primitive, gyroid, and diamond. Standard q

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Zhang, L. C., and T. B. Sercombe. "Selective Laser Melting of Low-Modulus Biomedical Ti-24Nb-4Zr-8Sn Alloy: Effect of Laser Point Distance." Key Engineering Materials 520 (August 2012): 226–33. http://dx.doi.org/10.4028/www.scientific.net/kem.520.226.

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As many complex processing parameters are involved in Selective Laser Melting (SLM), an understanding of the scientific and technical aspects of the production route on the microstructural evolution during SLM process is required in order to obtain parts with near full density and desirable surface finish. Although the effects of the various processing parameters on the density of parts have been well documented, the effect of laser point distance on density and mechanical properties of the SLM-produced parts has not been widely studied. In this paper, we present the results of using SLM to pr

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Leal, Malena Ley Bun, Barbara Bermudez-Reyes, Patricia del Carmen Zambrano Robledo, and Omar Lopez-Botello. "Parameter optimization of aluminum alloy thin structures obtained by Selective Laser Melting." MRS Advances 4, no. 55-56 (2019): 2997–3005. http://dx.doi.org/10.1557/adv.2019.434.

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ABSTRACTSelective Laser Melting (SLM) involves numerous fabrication parameters, the interaction between those parameters determine the final characteristics of the resulting part and because of the latter, it is considered a complex process. Low-density components is one of the main issues of the SLM process, due to the incorrect selection of process parameters. These defects are undesired in high specialized applications (i.e. aerospace, aeronautic and medical industries). Therefore, the characterization of the defects (pores) found in aluminum parts manufacture by SLM and the relationship wi

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Abdelal, Gasser, Daniel Higgins, Chi-Wai Chan, and Brian G. Falzon. "Numerical Modelling and Experimental Validation of Selective Laser Melting Processes Using a Custom Argon Chamber Setup for 316L Stainless Steel and Ti6AI4V." Coatings 14, no. 11 (2024): 1406. http://dx.doi.org/10.3390/coatings14111406.

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Selective Laser Melting (SLM) is an advanced additive manufacturing technique that demands meticulous control over thermal dynamics to maintain the integrity and performance of manufactured parts. This study presents the development and validation of a thermal model designed to enhance the SLM process for 316L stainless steel (316L SS) and titanium alloy Ti6Al4V. A specially constructed Argon Chamber Setup, equipped with a 200 W continuous-wave (CW) fibre laser system, was used to create an SLM-representative environment for 316L SS, enabling precise experimental validation of the model. This

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Jadhav, Dadbakhsh, Vleugels, et al. "Influence of Carbon Nanoparticle Addition (and Impurities) on Selective Laser Melting of Pure Copper." Materials 12, no. 15 (2019): 2469. http://dx.doi.org/10.3390/ma12152469.

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The addition of 0.1 wt % carbon nanoparticles significantly improved the optical absorption and flowability of gas-atomized copper powder. This facilitated selective laser melting (SLM) by reducing the required laser energy density to obtain 98% dense parts. Moreover, the carbon addition led to an in situ de-oxidation of the copper parts during the SLM process. The properties of the as-built copper parts were limited to a tensile strength of 125 MPa, a ductility of 3%, and an electrical conductivity of 22.7 × 106 S/m, despite the advantageous effect of carbon on the powder characteristics and

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Mokhtari, Morgane, Pierrick Pommier, Yannick Balcaen, and Joel Alexis. "Laser Welding of AISI 316L Stainless Steel Produced by Additive Manufacturing or by Conventional Processes." Journal of Manufacturing and Materials Processing 5, no. 4 (2021): 136. http://dx.doi.org/10.3390/jmmp5040136.

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Among all the additive manufacturing techniques, Laser Powder Bed Fusion (LBPF), also called Selective Laser Melting (SLM), is the most common technique due to its high capability of building complex parts with generally improved mechanical properties. One of the main drawbacks of this technique is the sample size limitation, which depends on elaborating chamber dimensions. In this study, we investigate the viability of obtaining large parts with the laser welding of additive manufactured plates. A comparison of the microstructure and the tensile mechanical properties of SLM-welded plates and

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Li, Zhonghua, Ibrahim Kucukkoc, David Z. Zhang, and Fei Liu. "Optimising the process parameters of selective laser melting for the fabrication of Ti6Al4V alloy." Rapid Prototyping Journal 24, no. 1 (2018): 150–59. http://dx.doi.org/10.1108/rpj-03-2016-0045.

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Purpose Surface roughness is an important evaluation index for industrial components, and it strongly depends on the processing parameters for selective laser molten Ti6Al4V parts. This paper aims to obtain an optimum selective laser melting (SLM) parameter set to improve the surface roughness of Ti6Al4V samples. Design/methodology/approach A response surface methodology (RSM)-based approach is proposed to improve the surface quality of selective laser molten Ti6Al4V parts and understand the relationship between the SLM process parameters and the surface roughness. The main SLM parameters (i.e

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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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Zhao, Zhanyong, Liang Li, Le Tan, et al. "Simulation of Stress Field during the Selective Laser Melting Process of the Nickel-Based Superalloy, GH4169." Materials 11, no. 9 (2018): 1525. http://dx.doi.org/10.3390/ma11091525.

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In this paper, GH4169 alloy’s distributions of temperature and stress during the selective laser melting (SLM) process were studied. The SLM process is a dynamic process of rapid melting and solidification, and we found there were larger temperature gradients near the turning of scan direction and at the overlap of the scanning line, which produced thermal strain and stress concentration and gave rise to warping deformations. The stresses increased as the distance became further away from the melt pool. There was tensile stress in the most-forming zones, but compressive stress occurred near th

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Maksimkin, Igor P., Arkadiy A. Yukhimchuk, Igor L. Malkov, et al. "Effect of Hydrogen on the Structure and Mechanical Properties of 316L Steel and Inconel 718 Alloy Processed by Selective Laser Melting." Materials 15, no. 14 (2022): 4806. http://dx.doi.org/10.3390/ma15144806.

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The interaction of hydrogen with specimens of 316L steel and Inconel 718 alloy processed by selective laser melting (SLM) was studied. The effect of hydrogen on the mechanical properties of SLM materials, hydrogen permeability, and microstructure was investigated; besides, these values were compared with the properties of conventionally produced materials. It was shown that SLM can be successfully used to produce parts for operation in hydrogen environments at high pressure at room temperature.

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Baitimerov, R. M. "Single Track Formation during Selective Laser Melting of Ti-6Al-4V Alloy." Materials Science Forum 946 (February 2019): 978–83. http://dx.doi.org/10.4028/www.scientific.net/msf.946.978.

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Selective laser melting (SLM) is an additive manufacturing technology that allows to produce functional parts with extremely complex shape from metal powder feedstock. 240 single tracks with the length of 10 mm were fabricated using different SLM process parameters: laser power output, powder layer thickness, point distance and exposure time. Obtained single tracks were measured using optical microscopy. An influence of SLM process parameters on geometrical characteristics of obtained single tracks was investigated.

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Hötter, Jan Steffen, Miranda Fateri, and Andreas Gebhardt. "Selective Laser Melting of Metals: Desktop Machines Open up New Chances even for Small Companies." Advanced Materials Research 622-623 (December 2012): 461–65. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.461.

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Additive manufacturing (AM) of metal parts by using Selective Laser Melting (SLM) has become a powerful tool mostly in the area of automotive, aerospace engineering and others. Especially in the field of dentistry, jewelry and related branches that require individualized or even one-of-a-kind products, the direct digital manufacturing process opens up new ways of design and manufacturing. In these fields, mostly small and medium sized businesses (SME) are operating which do not have sufficient human and economic resources to invest in this technology. But to stay competitive, the application o

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Yadroitsava, Ina, Stephen Grewar, Daniel Hattingh, and Igor Yadroitsev. "Residual Stress in SLM Ti6Al4V Alloy Specimens." Materials Science Forum 828-829 (August 2015): 305–10. http://dx.doi.org/10.4028/www.scientific.net/msf.828-829.305.

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Selective Laser Melting (SLM) presents a modern manufacturing process with an innovative technology which allows the production of full-density objects or fine-structured parts with complex geometry and inner structures. Stability and certification of the properties of SLM parts are important tasks for all producers and end-users. One of the drawbacks of this technology is high residual stress in as-made SLM objects. In this study X-ray diffraction technique was used for investigating the residual stress induced into SLM Ti6Al4V alloy samples. Principal stresses were estimated for the cut rect

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Maksimov, Peter, Oleg Smetannıkov, Aleksandra Dubrovskaya, Konstantin Dongauzer, and Leonid Bushuev. "Numeric simulation of aircraft engine parts additive manufacturing process." MATEC Web of Conferences 224 (2018): 01065. http://dx.doi.org/10.1051/matecconf/201822401065.

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This paper presents the results of software (ANSYS software) improvements specific for modeling the physical process of SLM (Selective Laser Melting). Improvement goal was to create a set of mathematical models and user environment (a set of APDL programs) based on the ANSYS finite element analysis system solver, allowing to perform the technological procedure of physical SLM process numerical modeling to the required degree of precision with an estimate of the final distortion and residual stresses of gas turbine engine parts to optimize the manufacturing process.

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Lu, Xufei, Michele Chiumenti, Miguel Cervera, Mehdi Slimani, and Iban Gonzalez. "Recoater-Induced Distortions and Build Failures in Selective Laser Melting of Thin-Walled Ti6Al4V Parts." Journal of Manufacturing and Materials Processing 7, no. 2 (2023): 64. http://dx.doi.org/10.3390/jmmp7020064.

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Additively manufactured thin-walled structures through selective laser melting (SLM) are of great interest in achieving carbon-neutral industrial manufacturing. However, residual stresses and warpages as well as recoater crashes often occur in SLM, leading to the build failure of parts, especially for large-scale and lightweight geometries. The challenge in this work consists of investigating how the recoater affects the warpage and (sometimes) causes the failure of different thin-walled Ti6Al4V parts (wall thickness of 1.0 mm). All these parts are printed on the same platform using a commerci

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