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Laser Heating Of Metals
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Book Synopsis Laser Heating of Metals by : A. M. Prokhorov
Download or read book Laser Heating of Metals written by A. M. Prokhorov and published by CRC Press. This book was released on 2018-01-31 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to ensure efficient use of lasers, and for any large-scale implementation, a thorough knowledge of the fundamental laws governing the interaction of radiation with matter is required. Laser Heating of Metals provides a systematic and comprehensive presentation of the fundamental principles underlying the physical and chemical mechanisms governing the interaction of laser radiation with solid targets, and in particular metals in gaseous environments, for a wide range of beam parameters. The authors have been active in the field of interactions between lasers and materials for many years, and this book summarises the results of their work, in particular concerning the action of CO2 lasers on metals. These results are then discussed at some length. Laser Heating of Materials will be of interest to scientists at all levels with an interest in the interaction of radiation with condensed matter, and in particular to those involved in laser cutting and welding etc, and metal-working.
Download or read book Laser Heating of Metals written by and published by . This book was released on 1990 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rapid Laser Heating of Metals Under Constant Uniaxial Stress by : Keith G. Gilbert
Download or read book Rapid Laser Heating of Metals Under Constant Uniaxial Stress written by Keith G. Gilbert and published by . This book was released on 1972 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: This experimental program examined the strength-temperature relationship of four metals subjected to rapid laser heating. The materials studied were 6Al4V annealed titanium alloy, 304 annealed stainless steel, AZ-31B hard rolled magnesium, and 2024 age-hardened aluminum. A 200-watt CO2 laser heated the metal samples while they were being held under a constant uniaxial tensile stress. The heating times ranged from 0.1 second to several seconds while the heating rates varied from 0.25 to 1.9 times the metals' melting temperature in degrees centigrade per second. Sample yield was defined as a 0.2 percent offset in excess of the laser-induced thermal expansion. In general, the samples heated rapidly by the laser show higher yield temperatures than their conventional long soak counterparts, an effect caused by inertial mechanical and metallurgical properties.
Book Synopsis Laser Heating Applications by : Bekir Yilbas
Download or read book Laser Heating Applications written by Bekir Yilbas and published by Elsevier. This book was released on 2012-06-22 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book describes those areas of thermodynamics which prove conductive to equilibrium and non-equilibrium heating theories in addition to yielding results that serve as data for further theories"--
Book Synopsis Energy Coupling and Plume Dynamics During High Power Laser Heating of Metals by :
Download or read book Energy Coupling and Plume Dynamics During High Power Laser Heating of Metals written by and published by . This book was released on 1997 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: High power laser heating of metals was studied utilizing experimental and numerical methods with an emphasis on the laser energy coupling with a target and on the dynamics of the laser generated vapor flow. Rigorous theoretical modeling of the heating, melting, and evaporation of metals due to laser radiation with a power density below the plasma shielding threshold was carried out. Experimentally, the probe beam deflection technique was utilized to measure the propagation of a laser induced shock wave. The effects of a cylindrical cavity in a metal surface on the laser energy coupling with a solid were investigated utilizing photothermal deflection measurements. A numerical calculation of target temperature and photothermal deflection was performed to compare with the measured results. Reflection of the heating laser beam inside the cavity was found to increase the photothermal deflection amplitude significantly and to enhance the overall energy coupling between a heating laser beam and a solid. Next, unsteady vaporization of metals due to nanosecond pulsed laser heating with an ambient gas at finite pressure was analyzed with a one dimensional thermal evaporation model for target heating and one dimensional compressible flow equations for inviscid fluid for the vapor flow. Lastly, the propagation of a shock wave during excimer laser heating of aluminum was measured with the probe beam deflection technique. The transit time of the shock wave was measured at the elevation of the probe beam above the target surface; these results were compared with the predicted behavior using ideal blast wave theory. The propagation of a gaseous material plume was also observed from the deflection of the probe beam at later times.
Book Synopsis Energy Coupling and Plume Dynamics During High Power Laser Heating of Metals by : Sungho Jeong
Download or read book Energy Coupling and Plume Dynamics During High Power Laser Heating of Metals written by Sungho Jeong and published by . This book was released on 1997 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Basics of Laser Material Processing by : Grigoruants
Download or read book Basics of Laser Material Processing written by Grigoruants and published by CRC Press. This book was released on 1994-04-04 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chapters present the problems of stresses and strains induced in metals and nonmetals in the processes of laser heating, analyze the results, offer the ways of laser treatment that dispense with subsequent machining operations, and describe the basic approaches to increase the strength of materials during laser heating. Other topics include the practical methods of implementing the processes of laser welding, cutting, hardening, alloying, and cladding (hardfacing). Basics of Laser Material Processing is designed for scientific workers and for those students in senior- and graduate-level courses.
Book Synopsis Localisation of the Reaction and Increase in the Steepness of Temperature Distribution in Laser Heating of Metals by : V. A. Bobyrev
Download or read book Localisation of the Reaction and Increase in the Steepness of Temperature Distribution in Laser Heating of Metals written by V. A. Bobyrev and published by . This book was released on 1989 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Pulse Heating of Surfaces and Thermal Stress Analysis by : Bekir S. Yilbas
Download or read book Laser Pulse Heating of Surfaces and Thermal Stress Analysis written by Bekir S. Yilbas and published by Springer Science & Business Media. This book was released on 2013-07-10 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces laser pulse heating and thermal stress analysis in materials surface. Analytical temperature treatments and stress developed in the surface region are also explored. The book will help the reader analyze the laser induced stress in the irradiated region and presents solutions for the stress field. Detailed thermal stress analysis in different laser pulse heating situations and different boundary conditions are also presented. Written for surface engineers.
Book Synopsis Laser Heat Treating of Metal by : National Research Council of Canada
Download or read book Laser Heat Treating of Metal written by National Research Council of Canada and published by . This book was released on 199? with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Theory of Laser Materials Processing by : John Dowden
Download or read book The Theory of Laser Materials Processing written by John Dowden and published by Springer. This book was released on 2017-06-16 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The revised edition of this important reference volume presents an expanded overview of the analytical and numerical approaches employed when exploring and developing modern laser materials processing techniques. The book shows how general principles can be used to obtain insight into laser processes, whether derived from fundamental physical theory or from direct observation of experimental results. The book gives readers an understanding of the strengths and limitations of simple numerical and analytical models that can then be used as the starting-point for more elaborate models of specific practical, theoretical or commercial value. Following an introduction to the mathematical formulation of some relevant classes of physical ideas, the core of the book consists of chapters addressing key applications in detail: cutting, keyhole welding, drilling, arc and hybrid laser-arc welding, hardening, cladding and forming. The second edition includes a new a chapter on glass cutting with lasers, as employed in the display industry. A further addition is a chapter on meta-modelling, whose purpose is to construct fast, simple and reliable models based on appropriate sources of information. It then makes it easy to explore data visually and is a convenient interactive tool for scientists to improve the quality of their models and for developers when designing their processes. As in the first edition, the book ends with an updated introduction to comprehensive numerical simulation. Although the book focuses on laser interactions with materials, many of the principles and methods explored can be applied to thermal modelling in a variety of different fields and at different power levels. It is aimed principally however at academic and industrial researchers and developers in the field of laser technology.
Book Synopsis Laser Heating Applications by : Bekir Sami Yilbas
Download or read book Laser Heating Applications written by Bekir Sami Yilbas and published by Elsevier. This book was released on 2012-05-26 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal treatment of materials occupies a significant, increasing proportion of MSE activity and is an integral component of modern curricula as well as a highly monetized component of industrial production. Laser processing of materials offers advantages over conventional methods of processing. Some of these advantages include fast processing, precision of operation, low cost and local treatment. Analytical modeling of laser processing gives insight into the physical and mathematical aspects of the problem and provides useful information on process optimization. This work from Professor Yilbas, a world-recognized expert in laser materials processing, provides the necessary depth and weight of analysis, collating mathematical and physical modeling and experimentation with the necessary discussion of applications. It meets coherence in topics with high technical quality. It encompasses the basics of laser processing and provides an introduction to analytical modeling of the process. Fundamentals and formulation of the heating process are presented for numerous heating conditions. Detailed analytical solutions for laser heating problems (including thermal stress) aids analysis of linkage between process parameters, such as laser pulse and laser intensity, and material response, such as temperature and stress Encompasses practical solutions to thermal heating problems (unlike the length solutions of numerical schemes) Extensive fourier and non-fourier treatments and consequent analysis provides improved understanding of mathematical transformations
Book Synopsis Encyclopedia of Thermal Stresses by : Richard B. Hetnarski
Download or read book Encyclopedia of Thermal Stresses written by Richard B. Hetnarski and published by Springer. This book was released on 2013-12-04 with total page 6643 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Thermal Stresses is an important interdisciplinary reference work. In addition to topics on thermal stresses, it contains entries on related topics, such as the theory of elasticity, heat conduction, thermodynamics, appropriate topics on applied mathematics, and topics on numerical methods. The Encyclopedia is aimed at undergraduate and graduate students, researchers and engineers. It brings together well established knowledge and recently received results. All entries were prepared by leading experts from all over the world, and are presented in an easily accessible format. The work is lavishly illustrated, examples and applications are given where appropriate, ideas for further development abound, and the work will challenge many students and researchers to pursue new results of their own. This work can also serve as a one-stop resource for all who need succinct, concise, reliable and up to date information in short encyclopedic entries, while the extensive references will be of interest to those who need further information. For the coming decade, this is likely to remain the most extensive and authoritative work on Thermal Stresses.
Book Synopsis Thermohydrodynamic Models of Laser Irradiation of Metals by : R. V. Arutyunian
Download or read book Thermohydrodynamic Models of Laser Irradiation of Metals written by R. V. Arutyunian and published by CRC Press. This book was released on 1990 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermohydrodynamic models of laser irradiation of metals examines models of continuous- and recurrent-pulse irradiation under conditions of dimensional and thermochemical treatment. Hydrodynamic mechanisms of melt displacement under conditions of dimensional and thermochemical treatment. Hydrodynamic mechanisms of melt displacement under conditions of laser drilling are discussed and the space-time structure of temperature in metal under the effect of a moving recurrent-pulse heat source is studied analytically and numerically. A thermo-hydrodynamic model of the welding process is analyzed and the two-dimensional problem of the heating of metal and melt motion under vapour pressure and surface tension is modelled numerically. Convective stirring of an admixture under the effect of pulsed laser radiation is considered and numerically investigated.
Book Synopsis Laser Material Processing by : William M. Steen
Download or read book Laser Material Processing written by William M. Steen and published by Springer Science & Business Media. This book was released on 2013-04-18 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: New chapters on bending and cleaning reflect the changes in the field since the last edition, completing the range of practical knowledge about the processes possible with lasers already familiar to users of this well-known text. Professor Steen's 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. From the reviews: "...well organized, and the text is very practical...The engineering community will find this book informative and useful." (OPTICS AND PHOTONICS NEWS, July/August 2005)
Book Synopsis Analysis of Heat Transfer in Subcooled Metal Powder Subjected to Pulsed Laser Heating by : Chad E. Konrad
Download or read book Analysis of Heat Transfer in Subcooled Metal Powder Subjected to Pulsed Laser Heating written by Chad E. Konrad and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction of metal powder and pulsed laser heat flux is investigated on two levels, the powder bed level and the particle level. The locations of the thermal penetration depth and the liquid-solid interface are obtained using the integral approximate method. Melting and resolidification of a subcooled, two-component metal powder bed subjected to temporal Gaussian heat flux is investigated analytically. An increase in heat source intensity or powder bed porosity will result in an increase of the melt pool depth, melt pool temperature, and the overall processing time. The melt pool becomes shallower with increasing subcooling. Heat conduction in a single subcooled metal powder particle subjected to nanosecond pulsed laser heating is also investigated analytically. A change in the repetition rate of the laser or an increase in maximum heat flux will result in a larger temperature rise on the surface of the particle, as well as a higher thermalized particle temperature after the laser pulse is finished. Although a discrepancy exists where peak surface temperatures are concerned, the thermalized temperatures of different-sized spheres are all the same. The time at which the particle is fully penetrated is only affected by a change in thermal diffusivity, laser pulse width, or particle radius. The physical model and results of this investigation pave the way for further modeling of Selective Laser Sintering (SLS) processes with a pulsed laser.
Book Synopsis Electron-phonon Nonequilibrium During Ultrashort Pulsed Laser Heating of Metals by : Andrew Neil Smith
Download or read book Electron-phonon Nonequilibrium During Ultrashort Pulsed Laser Heating of Metals written by Andrew Neil Smith and published by . This book was released on 2001 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
