Download or read book Laser Materials Processing Applications at Lawrence Livermore National Laboratory written by and published by . This book was released on 1993 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: High power and high radiance laser technologies developed at Lawrence Livermore National Laboratory (LLNL) such as copper-vapor lasers, solid-state slab lasers, dye lasers, harmonic wavelength conversion of these lasers, and fiber optic delivery systems show great promise for material processing tasks. Evaluation of models suggests significant potential for tenfold increases in welding, cutting, and drilling performance, as well as capability for applications in emerging technologies such as micromachining, surface treatment, and stereolithography. The goals of this program are to develop low-cost, reliable and maintainable industrial laser systems. Chains of copper lasers currently operate at more than 1.5 kW output and achieve mean time between failures of more than 1,000 hours. The beam quality of copper vapor lasers is approximately three times the diffraction limit. Dye lasers have near diffraction limited beam quality at greater than 1.0 kW. diode laser pumped, Nd:YAG slab lasers are also being developed at LLNL. Current designs achieve powers of greater than 1.0 kW and projected beam quality is in the two to five times diffraction limited range. Results from cutting and drilling studies in titanium and stainless steel alloys show that cuts and holes with extremely fine features can be made with dye and copper-vapor lasers. High radiance beams produce low distortion and small heat-affected zones. The authors have accomplished very high aspect ratio holes in drilling tests (> 60:1) and features with micron scale (5-50?m) sizes. Other, traditionally more difficult, materials such as copper, aluminum and ceramics will soon be studied in detail.
Download or read book High Power High Beam Quality Solid State Lasers for Materials Processing Applications written by and published by . This book was released on 1994 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Laser Science and Technology Department at Lawrence Livermore National Laboratory is developing solid state lasers with high average power and high beam quality. Specific systems include a laser to generate 10 to 14 Å x-rays for proximity print lithography, a 400 mJ, 500 Hz laser for 130 Å projection lithography and unique systems for speckle imaging, laser radars and medical treatments.
Download or read book Lasers in Materials Processing written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A status report on the uranium Laser Isotope Separation (LIS) Program at the Lawrence Livermore National Laboratory is presented. Prior to this status report, process economic analysis is presented so as to understand how the unique properties of laser photons can be best utilized in the production of materials and components despite the high cost of laser energy. The characteristics of potential applications that are necessary for success are identified, and those factors that have up to now frustrated attempts to find commercially viable laser induced chemical and physical process for the production of new or existing materials are pointed out.
Download or read book Laser Material Processing written by William M. Steen and published by Springer Science & Business Media. This book was released on 2010-11-30 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: The informal style of Laser Material Processing (4th Edition) will guide you smoothly from the basics of laser physics to the detailed treatment of all the major materials processing techniques for which lasers are now essential. • Helps you to understand how the laser works and to decide which laser is best for your purposes. • New chapters on laser physics, drilling, micro- and nanomanufacturing and biomedical laser processing reflect the changes in the field since the last edition, updating and completing the range of practical knowledge about the processes possible with lasers already familiar to established users of this well-known text. • Provides a firm grounding in the safety aspects of laser use. • Now with end-of-chapter exercises to help students assimilate information as they learn. • The authors’ lively presentation is supported by a number of original cartoons by Patrick Wright and Noel Ford which will bring a smile to your face and ease the learning process.
Download or read book Lasers in Chemical Processing written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The high cost of laser energy is the crucial issue in any potential laser-processing application. It is expensive relative to other forms of energy and to most bulk chemicals. We show those factors that have previously frustrated attempts to find commercially viable laser-induced processes for the production of materials. Having identified the general criteria to be satisfied by an economically successful laser process and shown how these imply the laser-system requirements, we present a status report on the uranium laser isotope separation (LIS) program at the Lawrence Livermore National Laboratory (LLNL).
Download or read book Advances in Laser Materials Processing written by Jonathan R. Lawrence and published by Woodhead Publishing. This book was released on 2017-09-20 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Laser Materials Processing: Technology, Research and Application, Second Edition, provides a revised, updated and expanded overview of the area, covering fundamental theory, technology and methods, traditional and emerging applications and potential future directions. The book begins with an overview of the technology and challenges to applying the technology in manufacturing. Parts Two thru Seven focus on essential techniques and process, including cutting, welding, annealing, hardening and peening, surface treatments, coating and materials deposition. The final part of the book considers the mathematical modeling and control of laser processes. Throughout, chapters review the scientific theory underpinning applications, offer full appraisals of the processes described and review potential future trends. A comprehensive practitioner guide and reference work explaining state-of-the-art laser processing technologies in manufacturing and other disciplines Explores challenges, potential, and future directions through the continuous development of new, application-specific lasers in materials processing Provides revised, expanded and updated coverage
Download or read book Lasers in Materials Processing written by Alan Gomersall and published by Springer Science & Business Media. This book was released on 2013-12-01 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Materials Processing written by Leonard R. Migliore and published by CRC Press. This book was released on 2018-10-08 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses the basic principles necessary to understand lasers, explains laser interactions with materials, and surveys the wide variety of industrial applications of the major laser types, covering in detail the operating mechanisms of carbon dioxide, Nd:YAG, and excimer lasers. It presents lasers as manufacturing tools rather than laboratory devices.
Download or read book Laser Processing of Materials written by Peter Schaaf and published by Springer Science & Business Media. This book was released on 2010-07-28 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser materials processing has made tremendous progress and is now at the forefront of industrial and medical applications. The book describes recent advances in smart and nanoscaled materials going well beyond the traditional cutting and welding applications. As no analytical methods are described the examples are really going into the details of what nowadways is possible by employing lasers for sophisticated materials processing giving rise to achievements not possible by conventional materials processing.
Download or read book Laser Processing Analysis and Research written by and published by . This book was released on 1996 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Exploratory Research Project addressed the coupling between short pulse, short wave length, high-radiance laser beams and a solid substrate. The motivation for conducting this research stems from the ever increasing application of high-radiance lasers in processing materials for science and industry. As a result of extensive research and development activities at Lawrence Livermore National Laboratory, there are now several lasers that can cut metals, ceramics, and composites rapidly with unmatched precision. Both gas and solid state lasers are now being employed in this area. The purpose of this project is to develop scientific understanding of the cutting process and to provide tools to optimize the laser system for various applications like precision hole drilling, cutting, welding, and ablative coating. There is a significant amount of scientific data and model development that supports this area of study. Kar and Mazumder reported on studies of pulsed laser coupling for the creation of nano-particles. This provided the initial motivation for our model. Here we include a more detailed discussion of light absorption and propagation, and electron plasma effects and expansion into an ambient gas rather than only in a vacuum. Our first effort began in FY1994, which yielded the basic model. In FY1995, we refined the code and later identified a more appropriate equation of state. The experimental program and the modeling effort provided the essential parametric evaluations needed to benchmark the model. This program enabled us to discover several underlying plasma effects important to the cutting or ablation process. Extensive measurements of the plume of expanding vapor and optical emissions give plasma temperatures, densities, and hydrodynamic estimates of the vapor's neutral properties. In the first studies, both aluminum and iron are treated. Carbon studies were included in the final phases of this work. 3 refs.
Download or read book Advances in Laser Materials Processing written by J. R. Lawrence and published by Woodhead Publishing. This book was released on 2010-07-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of its capacity for continuous development and flexibility of use, the laser has become a mainstream manufacturing tool in many industrial sectors. This timely book relays the state-of-the-art in laser materials processing technology and applications and likely advances to be made from current research taking place around the world. The book also promotes appreciation for laser applications in a variety of industrial sectors. After two introductory chapters, the book reviews the main areas of laser processing. Starting with laser cutting and machining, the book discusses laser welding, annealing and hardening. It then considers surface treatment, coating and materials deposition as well as other engineering techniques such as peening and net-shape engineering, before discussing laser micro and nano-fabrication techniques. The book concludes by looking at modelling and process control. With its distinguished editorial team and contributions from renowned researchers working in every corner of the globe, Advances in laser materials processing provides a comprehensive yet detailed coverage of the many topics that comprise the field of laser materials processing. It provides a reference source for the scientists and engineers in such areas as metals processing and microelectronics, as well those conducting laser materials processing research in either academia or industry.
Download or read book Technology Transfer written by and published by . This book was released on 1994 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-06 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Laser Materials Processing written by Elijah Kannatey-Asibu, Jr. and published by John Wiley & Sons. This book was released on 2023-01-09 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Laser Materials Processing Authoritative resource providing state-of-the-art coverage in the field of laser materials processing, supported with supplementary learning materials Principles of Laser Materials Processing goes over the most recent advancements and applications in laser materials processing, with the second edition providing a welcome update to the successful first edition through updated content on the important fields within laser materials processing. The text includes solved example problems and problem sets suitable for the readers’ further understanding of the technology explained. Split into three parts, the text first introduces basic concepts of lasers, including the characteristics of lasers and the design of their components, to aid readers in their initial understanding of the technology. The text then reviews the engineering concepts that are needed to analyze the different processes. Finally, it delves into the background of laser materials and provides a state-of-the-art compilation of material in the major application areas, such as laser cutting and drilling, welding, surface modification, and forming, among many others. It also presents information on laser safety to prepare the reader for working in the industry sector and provide practicing engineers the updates needed to work safely and effectively. In Principles of Laser Materials Processing, readers can expect to find specific information on: Laser generation principles, including basic atomic structure, atomic transitions, population distribution, absorption, and spontaneous emission Optical resonators, including standing waves in a rectangular cavity, planar resonators, beam modes, line selection, confocal resonators, and concentric resonators Laser pumping, including optical pumping, arc/flash lamp pumping, energy distribution in the active medium, and electrical pumping Broadening mechanisms, including line-shape functions, homogeneous broadening such as natural and collision, and inhomogeneous broadening Principles of Laser Materials Processing is highly suitable for senior undergraduate and graduate students studying laser processing, and non-traditional manufacturing processes; it is also aimed at researchers to provide additional information to be used in research projects that are to be undertaken within the technology field.
Download or read book Femtosecond Laser Materials Processing written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of femtosecond lasers allows materials processing of practically any material with extremely high precision and minimal collateral damage. Advantages over conventional laser machining (using pulses longer than a few tens of picoseconds) are realized by depositing the laser energy into the electrons of the material on a time scale short compared to the transfer time of this energy to the bulk of the material, resulting in increased ablation efficiency and negligible shock or thermal stress. The improvement in the morphology by using femtosecond pulses rather than nanosecond pulses has been studied in numerous materials from biologic materials to dielectrics to metals. During the drilling process, we have observed the onset of small channels which drill faster than the surrounding material.
Download or read book Lasers written by Charles Blain and published by Nova Publishers. This book was released on 2002 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developments in lasers continue to enable progress in many areas such as eye surgery, the recording industry and dozens of others. This book presents citations from the book literature for the last 25 years and groups them for ease of access which is also provided by subject, author and titles indexes.
