Flow Diagnostics Produced by Selective Laser Melting of Cutting Nozzles
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Using Lasers to Improve Manufacturing Competitiveness Pg.6
LIA TODAY THE OFFICIAL NEWSLETTER OF THE LASER INSTITUTE OF AMERICA The international society dedicated to fostering lasers, laser applications and laser safety worldwide. FOCUS: LASERS FOR MANUFACTURING VOLUME 20 NO. 2 MARCH / APRIL 2012 Using Lasers to Improve Manufacturing Competitiveness pg.6 Courtesy Fraunhofer Institute for Laser Technology ILT, Aachen, Germany ILT, Technology Institute for Laser Courtesy Fraunhofer Ultrafast Lasers in Medical Applications - pg. 8 The Future of Manufacturing Presented at LAM 2012 - pg. 10 13501 Ingenuity Drive, Suite 128 Orlando, FL 32826 Phone: +1.407.380.1553 Fax: +1.407.380.5588 www.lia.org LIA TODAY CVR MarApr-12_3.indd 1 4/3/12 10:58:12 PM IN THIS ISSUE LIATHE OFFICIAL NEWSLETTER TODAY OF THE LASER INSTITUTE OF AMERICA LIA TODAY is published bimonthly to educate and inform laser professionals in laser safety and new trends related to laser technology. LIA members receive a free subscription to LIA TODAY and the Journal of Laser Applications® in addition to FEATURES discounts on all LIA products and services. LME 2012 – Using Lasers to Improve The editors of LIA TODAY welcome input from readers. Please submit news-related Manufacturing Competitiveness 6 releases, articles of general interest and letters to the editor. Mail us at LIA TODAY, 13501 Ingenuity Drive, Suite 128, Orlando, FL 32826, fax +1.407.380.5588, or send Ultrafast Lasers in Medical material by e-mail to [email protected]. Applications 8 The Future of Manufacturing Presented at LAM 2012 10 2012 LIA OFFICERS Plasmonic Devices Fabricated by President – Reinhart Poprawe CALENDAR OF EVENTS Fraunhofer Institute for Laser Femtosecond Laser Nanowelding 14 Technology Laser Safety Officer Training President-Elect – Klaus Löffler June 26-28, 2012 | Chicago, IL TRUMPF Laser & Systems GmbH Dec. -
Uva-DARE (Digital Academic Repository)
UvA-DARE (Digital Academic Repository) Design and fabrication through additive manufacturing of devices for multidimensional LC based on computational insights Adamopoulou, T. Publication date 2020 Document Version Other version License Other Link to publication Citation for published version (APA): Adamopoulou, T. (2020). Design and fabrication through additive manufacturing of devices for multidimensional LC based on computational insights. General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulations If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: https://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. UvA-DARE is a service provided by the library of the University of Amsterdam (https://dare.uva.nl) Download date:25 Sep 2021 Symbols and Abbreviations PFHDA 1H,1H,6H,6H-Perfluoro-1,6-hexyl diacrylate 1 D first dimension 1D one-dimensional 2 D second dimension 2DLC two-dimensional LC 2D-PAGE 2D – poly(acryl -
Unraveling Resistive Versus Collisional Contributions to Relativistic Electron Beam Stopping Power in Cold-Solid and in Warm-Dense Plasmas B
Unraveling resistive versus collisional contributions to relativistic electron beam stopping power in cold-solid and in warm-dense plasmas B. Vauzour,1, 2 A. Debayle,3, 4 X. Vaisseau,1 S. Hulin,1 H.-P. Schlenvoigt,5 D. Batani,1, 6 S.D. Baton,5 J.J. Honrubia,3 Ph. Nicola¨ı,1 F.N. Beg,7 R. Benocci,6 S. Chawla,7 M. Coury,8 F. Dorchies,1 C. Fourment,1 E. d'Humi`eres,1 L.C. Jarrot,7 P. McKenna,8 Y.J. Rhee,9 V.T. Tikhonchuk,1 L. Volpe,6 V. Yahia,5 and J.J. Santos1, a) 1)Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France 2)Laboratoire d'Optique Appliqu´ee,ENSTA-CNRS-Ecole Polytechnique, UMR 7639, 91761 Palaiseau, France 3)ETSI Aeron´auticos, Universidad Polit´ecnica de Madrid, Madrid, Spain 4)CEA, DAM, DIF, F-91297 Arpajon, France 5)LULI, Ecole Polytechnique CNRS/CEA/UPMC, 91128 Palaiseau Cedex, France 6)Dipartimento di Fisica, Universit`adi Milano-Bicocca, Milano 20126, Italy 7)University of California, San Diego, La Jolla, California 92093, USA 8)SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom 9)Korea Atomic Energy Research Institute (KAERI), Daejon 305-600, Korea (Dated: 18 February 2014) We present results on laser-driven relativistic electron beam propagation through aluminum samples, which are either solid and cold, or compressed and heated by laser-induced shock. A full numerical description of fast electron generation and transport is found to reproduce the experimental absolute Kα yield and spot size measurements for varying target thickness, and to sequentially quantify the collisional and resistive electron stopping powers. -
Influence of the Conditions of Selective Laser Melting on Evaporation
MATEC Web of Conferences 224, 01060 (2018) https://doi.org/10.1051/matecconf/201822401060 ICMTMTE 2018 Influence of the conditions of selective laser melting on evaporation Roman S. Khmyrov1,*, Сyrill E. Protasov1, and Andrey V. Gusarov1 1Moscow State University of Technology “STANKIN”, 127055, Vadkovskii per. 1, Moscow, Russia Abstract. The paper presents the results of optical diagnostics of evaporation and displacement of powder fractions during the formation of a single track in the process of selective laser melting. The velocity of the powder fractions is estimated. It was defined, that an increase in the scanning speed leads to an decrease in the particle coming out rate from the molten pool and the rate at which they are attracted. The results allow evaluating the kinetics of the mass-transfer process during selective laser melting. It was clearly shown the material quality properties after the selective laser melting are strongly influenced by the formed thermal field in the laser-irradiated zone. 1 Introduction Laser material processing becomes already quite common in the modern industry, for example such processes as laser cutting, welding, drilling, marking. Technologies of additive manufacturing (growing) of parts from metal powders are also becoming more popular and characterizing by fundamentally different manufacturing strategy: layer by layer. It should be mentioned, that the lack of theoretical apparatus describing the process technology is the fundamental problem in the field of laser treatment. Such fundamental problems which are necessary to solve are: powder consolidation kinetics and its dependence of process parameters, intensive powder release (slopping) from powder consolidation zone: its causes, methods of influence on it; physical mechanisms leading to geometry instability of fused bead, instability at overcharged and undercharged scanning speeds of the laser beam relative to the optimal values, mechanisms of integration of individual track in a single one. -
A Light Over All Processes Cnc-Powered Laser Innovation Laser Use in Manufacturing Grows Welding Applications Expand
LASER FOCUS — A SPECIAL SECTION I R O M G M D of esy urt Co LASERS TODAY: A LIGHT OVER ALL PROCESSES CNC-POWERED LASER INNOVATION LASER USE IN MANUFACTURING GROWS WELDING APPLICATIONS EXPAND A laser cutting head, mounted to the end effector of a robot, is robust and compact to withstand the challenging environment while having internal sensors and mechanisms that provide accuracy and feature capabilities that are beyond the normal capacity of the robot. Courtesy of Laser Mechanisms Inc. LASERS: A LIGHT OVER ALL PROCESSES AND MARKETS SME’s Industrial Laser Community Geoff Shannon, PhD, Laser Technology Manager—Miyachi America, and Mark Taggart, President—Laser Mechanisms Inc. s we approach the 50-year anniversary of laser use in manu- facturing, the use of lasers to make things is accelerating and expanding. Laser applications that just a few years ago were thought to be impossible or too expensive are Abecoming feasible and cost effective. Lasers, in fact, touch all of our lives on a daily basis. With great preci- sion and efficiency, lasers: • cut the glass for our smartphone and tablet screens; • weld the hard disk drives in our PCs and laptops; • cut airbag material and weld airbag detonators in our cars; • drill the fuel injectors in our engines to increase fuel economy; and • cut medical stents that enhance our lives. MfgEngMedia.com LF3 What’s more, remarkable, fast-paced advances in specialized optics and high-speed beam delivery computers, sensor technologies, and wireless com- systems, and non-metals welding and processing. munications are creating increasingly sophisticated Advancements in the field of laser additive manufac- tools such as process monitors and system diagnostics turing have also caught the attention of the public that are enhancing the performance, reliability and and the media. -
A Review on Selective Laser Sintering/Melting (SLS/SLM) of Aluminium Alloy Powders: Processing, Microstructure, and Properties
This is a repository copy of A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties. White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/90338/ Version: Accepted Version Article: Olakanmi, EO, Cochrane, RF and Dalgarno, KW (2015) A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties. Progress in Materials Science, 74. 401 - 477. ISSN 0079-6425 https://doi.org/10.1016/j.pmatsci.2015.03.002 © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version - refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher’s website. Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing [email protected] including the URL of the record and the reason for the withdrawal request. [email protected] https://eprints.whiterose.ac.uk/ Number of manuscript folios: One hundred and ninety-two (192) pages. -
The Effect of Laser Scanning Strategies on Texture, Mechanical Properties, and Site-Specific Grain Orientation in Selective Laser Melted 316L SS
Materials and Design 193 (2020) 108852 Contents lists available at ScienceDirect Materials and Design journal homepage: www.elsevier.com/locate/matdes The effect of laser scanning strategies on texture, mechanical properties, and site-specific grain orientation in selective laser melted 316L SS Jithin James Marattukalam a,⁎, Dennis Karlsson b, Victor Pacheco b, Přemysl Beran c,e, Urban Wiklund d, Ulf Jansson b, Björgvin Hjörvarsson a, Martin Sahlberg b a Department of Physics, Materials Physics, Uppsala University, Box 530, SE-75121 Uppsala, Sweden b Department of Chemistry- Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden c Department of Neutron Physics, Nuclear Physics Institute, ASCR, CZ -25068 Řež, Czech Republic d Department of Engineering Sciences, Applied Materials Science, Uppsala University, Box 534, 75121 Uppsala, Sweden e European Spallation Source ERIC, Box 176, 22100 Lund, Sweden HIGHLIGHTS GRAPHICAL ABSTRACT • Laser scanning strategies strongly influ- ence the crystallographic texture in as- printed components. • A ⟨100⟩ single crystalline-like texture is obtained in the direction of laser writ- ing. • Site-specific texture control is achieved by selectively switching laser scanning strategies. article info abstract Article history: Selective laser melting has been used to demonstrate the striking effect of laser scanning strategies on the crys- Received 13 December 2019 talline texture in 316L SS. The aligned crystal orientation along the tensile direction (Z-axis) could be varied using Received in revised form 1 June 2020 the scanning strategy. A strong 〈100〉 single crystalline-like texture is obtained in the direction of the laser scan Accepted 2 June 2020 and a 〈110〉 texture was observed in the build direction when using a bidirectional scan without rotation. -
Acrylic-Processing-Guide.Pdf
Laser Processing Guide working with acrylic www.troteclaser.com www.trotec-materials.com Acrylic is becoming an increasingly popular manufacturing material used across many industries for a wide range of products such as signs, displays and trophies, to name a few. It is highly versatile, durable, aesthetically pleasing, and processes well with a laser. For many, acrylic is a convenient and affordable alternative to glass because it’s largely impact-resistant and weighs about half as much, but still offers a high level of clarity. A laser is a highly effective and efficient way to cut, mark or engrave acrylic. Including general processing instructions and pointers, time-saving tricks and troubleshooting advice, the following guide was designed to help new laser users as well as intermediate users improve their acrylic processing technique and results. With a little practice and a few pointers, you will be able to use your laser to create perfectly polished acrylic edges, engrave intricate details, and produce precise cuts and contours. Getting 01 Started Engraving Processing Techniques and 02 Recommended Settings Cutting Processing Techniques and 03 Recommended Settings Common 05 Mistakes Trouble 06 Shooting Getting Started Acrylic materials come in a wide range of color, texture, and finish combinations. There are three main types of acrylic: Cell Cast Acrylic that is cast into shapes • Laser engraving appears frosted • Laser cutting easy Continuous Cast Acrylic that is continuously casted into sheets using a sheet shape molded on an assembly line • Laser engraving appears frosted • Laser cutting easy Extruded • Laser engraving is translucent, making it difficult to see • Can be easily cut with a laser using lower power settings. -
Techniques in Laser Cutting and Engraving Leather
Where the Laser Meets the Leather: Techniques in Laser Cutting and Engraving Leather SARAH PIKE If you had ever told me that, as an artist trained in traditional figurative painting who works in stone lithography, I would end up running a laser cutting business, I wouldn't have believed you. But it was through my printmaking discipline and sensibilities that I came to work with laser cutting. And today I draw great satisfaction in helping artists—primarily bookbinders—bridge the gap between handcraft and new technologies. In this article I will share a variety of laser cutting and engraving techniques for working with leather and parchment. A Look at What's Possible Laser cutters, which vaporize material using a pulsating That said, the question I most often get is, “Can you cut beam of light, perform three main tasks: they cut, line metal?” The answer is no: a fiber laser is needed for engrave, and area engrave. When the laser cuts or line laser cutting metal. Due to their size and cost, fiber engraves, it follows the path of the line; when it area lasers are more often found at businesses that service engraves it moves back and forth like an ink-jet printer. industrial companies. Note that in this context, engraving refers to the partial removal of material that can be performed at multiple While I'll try to be as specific as possible, so many depths (fig. 1). variables come into play that it's difficult to give universal guidelines. Laser cutter settings can vary greatly depending on how the leather was processed, the dye used, what part of the skin is being used, and the life of the animal. -
The Effect of the Laser Incidence Angle in the Surface of L-PBF
coatings Article The Effect of the Laser Incidence Angle in the Surface of L-PBF Processed Parts Sara Sendino 1,* , Marc Gardon 2, Fernando Lartategui 3 , Silvia Martinez 1 and Aitzol Lamikiz 1 1 Aerospace Advance Manufacturing Research Center-CFAA, P. Tecnológico de Bizkaia 202, 48170 Zamudio, Spain; [email protected] (S.M.); [email protected] (A.L.) 2 EMEA AM Applications Manager, Renishaw Ibérica, Carrer de la Recerca 7, 08850 Barcelona, Spain; [email protected] 3 UO Structures & Statics, ITP Aero, P. Tecnológico de Bizkaia 300, 48170 Zamudio, Spain; [email protected] * Correspondence: [email protected] Received: 29 September 2020; Accepted: 22 October 2020; Published: 24 October 2020 Abstract: The manufacture of multiple parts on the same platform is a common procedure in the Laser Powder Bed Fusion (L-PBF) process. The main advantage is that the entire working volume of the machine is used and a greater number of parts are obtained, thus reducing inert gas volume, raw powder consumption, and manufacturing time. However, one of the main disadvantages of this method is the possible differences in quality and surface finish of the different parts manufactured on the same platform depending on their orientation and location, even if they are manufactured with the same process parameters and raw powder material. Throughout this study, these surface quality differences were studied, focusing on the variation of the surface roughness with the angle of incidence of the laser with respect to the platform. First, a characterization test was carried out to understand the behavior of the laser in the different areas of the platform. -
Analysis of Stainless Steel Waste Products Generated During Laser Cutting in Nitrogen Atmosphere
Article Analysis of Stainless Steel Waste Products Generated during Laser Cutting in Nitrogen Atmosphere Maciej Zubko 1,2,* , Jan Loskot 2 , Paweł Swiec´ 1 , Krystian Prusik 1 and Zbigniew Janikowski 3 1 Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland; [email protected] (P.S.);´ [email protected] (K.P.) 2 Department of Physics, University of Hradec Králové, Rokitanského 62, 500-03 Hradec Králové, Czech Republic; [email protected] 3 “Silver” PPHU, ul. Rymera 4, 44-270 Rybnik, Poland; [email protected] * Correspondence: [email protected]; Tel.: +48-32-3497-509; Fax: +48-32-3497-594 Received: 22 October 2020; Accepted: 23 November 2020; Published: 25 November 2020 Abstract: Laser cutting technology is one of the basic approaches used for thermal processing of parts fabricated from almost all engineering materials. Various types of lasers are utilized in the industry with different attendant gases such as nitrogen or argon. When the laser beam interacts with a metal surface, the area underneath is heated to the melting point. This liquid or vaporized metal is ejected from the kerf area to the surrounding atmosphere by attendant gas and becomes undesirable waste in the form of powder. In the presented work, the X-ray diffraction, scanning electron microscopy, electron backscatter diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopy methods were used to analyze AISI 304 stainless steel, which was cut by a semiconductor fiber laser, and the waste powder generated during the laser cutting process. The results suggest that this waste material may be reused for industrial applications such as additive manufacturing. -
Feasibility Study of Selective Laser Melting for Metal Matrix Diamond Tools
crystals Communication Feasibility Study of Selective Laser Melting for Metal Matrix Diamond Tools Xiaohong Fang 1 , Zhan Yang 2, Songcheng Tan 1,* and Longchen Duan 1 1 Faculty of Engineering, China University of Geosciences, Wuhan 430074; China; duyaoff@163.com (X.F.); [email protected] (L.D.) 2 School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan 430074, China; fi[email protected] * Correspondence: [email protected] Received: 17 June 2020; Accepted: 7 July 2020; Published: 10 July 2020 Abstract: Metal matrix diamond composite samples were fabricated by selective laser melting (SLM) at different forming parameters to investigate the feasibility and new challenges when SLM is applied to diamond tools manufacturing. The surface topographies, Rockwell hardness, compactness, microstructure, and diamond thermal damage of the samples were investigated in this study. The fabricated samples had high porosity and relatively low Rockwell hardness and compactness, and some ridge-shaped bulges and textures were observed at the edges and surfaces. Microstructure analyses showed that diamond particles were homogeneously distributed and metallurgically bonded within the metal matrix. The thermal damage pits on the diamond crystals along the scanning direction were the dominant damage type for SLM, which was completely different from conventional vacuum brazing and hot-pressing sintering. Although some challenges need to be further studied, our results demonstrate that SLM has great potential to propel the development of metal matrix diamond tools. Keywords: metal matrix composites; particle reinforcement; 3-D printing, microstructure; thermal damage 1. Introduction Diamond tools refer to products that contain diamond in their texture as a key element [1–3].