Download or read book Advanced Study of Pulsed Laser Micro Polishing written by and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fundamental study of pulsed laser micro polishing (PLμP) was conducted as a method for reducing surface roughness of micro/meso-scale metallic parts. Although PLμP was shown to be an effective process at these scales, the knowledge of the process physics lacked thoroughness. The goal of this work, therefore was to improve upon the existing knowledge of PLμP, with focus on developing physics based models, understanding the effects of various process parameters and developing strategies for selection of process parameters and laser scan trajectories. In PLμP, a small area on a surface is irradiated with laser pulses to melt roughness features. The molten features are smoothed out by surface tension and viscous forces. Two polishing regimes for PLμP, namely thermocapillary regime and capillary regime, were defined based on whether the temperature gradient of surface tension driven thermocapillary flows are dominant or negligible. Dominant thermocapillary flows, in the thermocapillary regime, result in significant smoothening of both low and high spatial frequency features, but introduce residual low-amplitude high spatial frequency features. In the capillary regime, thermocapillary flows are negligible and the molten features oscillate as stationary capillary waves that damp out due to the viscosity of the molten metal. The capillary regime is only effective at smoothening higher spatial frequency features. A physics based surface finish prediction model was developed and validated for the capillary regime. The fundamental understanding of the two polishing regimes lead to the development of a two-pass multi-regime PLμP method that takes advantage of both the polishing regimes. In this method, the first pass, in the thermocapillary regime, results in significant reduction of the surface roughness. The second pass, in the capillary regime, removes the residual process features introduced in the first pass. Finally, an artificial potential fields based method was proposed to generate laser scan trajectories for PLμP that can overcome the limitations of a zigzag trajectory. In this method, artificial attractive fields are assigned based on surface condition and repulsive fields assigned to regions where polishing is not desired. The generated trajectories are irregular, smooth and adapt to the changing surface condition of surface being polished.

Download or read book A Numerical and Experimental Study of Pulsed Laser Polishing of Metals at the Meso micro Scale written by Tyler L. Perry and published by . This book was released on 2009 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Surface Melting of Metals and the Effects in Pulsed Laser Micro Polishing written by Chao Ma and published by . This book was released on 2012 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Equipment Recommendations and Experimental Studies Towards Automation of Friction Stir Welding and Pulsed Laser Micro Polishing written by Dennis Marc Wolf and published by . This book was released on 2009 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Surface Roughness Prediction and Effects of Initial Surface Textures for Pulsed Laser Micro Polishing of Metal Alloys written by Qinghua Wang and published by . This book was released on 2015 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Tribology written by Jianbin Luo and published by Springer Science & Business Media. This book was released on 2010-07-16 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Advanced Tribology" is the proceedings of the 5th China International Symposium on Tribology (held every four years) and the 1st International Tribology Symposium of IFToMM, held in Beijing 24th-27th September 2008. It contains seven parts: lubrication; friction and wear; micro/nano-tribology; tribology of coatings, surface and interface; biotribology; tribo-chemistry; industry tribology. The book reflects the recent progress in the fields such as lubrication, friction and wear, coatings, and precision manufacture etc. in the world. The book is intended for researchers, engineers and graduate students in the field of tribology, lubrication, mechanical production and industrial design. The editors Jianbin Luo, Yonggang Meng, Tianmin Shao and Qian Zhao are all the professors at the State Key Lab of Tribology, Tsinghua University, Beijing.

Download or read book Advanced Engineering of Materials Through Lasers written by J. Radhakrishnan and published by Springer Nature. This book was released on 2022-06-15 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the fundamentals of different laser-based manufacturing and processing, namely laser shock peening, laser micromachining, laser cleaning, cladding, remelting, laser honing, and other several aspects of lasers. The book discusses the general laser interaction with different materials. The application of laser-based post-processing of additive manufacturing and repair engineering is reported. It also provides the reader with mechanism of lasers in manufacturing and recent developments in tools, technologies, controls, and operations.

Download or read book Tailored Light 2 written by Reinhart Poprawe and published by Springer Science & Business Media. This book was released on 2011-01-22 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book covers the application technology of lasers, focusing more on the vast range of processes than on individual applications, in order to motivate and enable future innovations. The physical basics are presented in the first half of the book. The following examination of application categories and their processes is documented by experts from their practical points of view but always refers back to the underlying physical principles. In this way, readers are free to choose their own individual level of depth in understanding this globally relevant field of innovation.

Download or read book Applicability of a Picosecond Laser for Micro polishing of Metallic Surfaces written by Abdullah Mohammad Khalid Hafiz and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An increasing number of recent technological advancements is linked to the adoptions of ultra-short pulsed picosecond (ps) lasers in various material processing applications. The superior capability of this laser is associated with precise control of laser-material interaction resulted from extremely short interaction time. In this context, the present study explored the applicability of a ps laser in laser micro-polishing (LæP) of Inconel 718 (IN718) and AISI H13 tool steel. The melting regime-a mandatory phase for LæP-was determined experimentally by the variation of focal offset to attain desired laser fluence. The finite element formulation of heat transfer equation and its solution were also estimated in order to develop a theoretical foundation for the heat transfer mechanism in ps laser-material interaction. The initial one dimensional (1D) line polishing experiments were performed on ground IN718 and H13 tool steel samples with the parameters related to the melting regime of corresponding material. The knowledge of this initial experimental investigation was later utilized to prepare the surface topography by micromilling with a specific step-over and scallop height, followed by LæP experiments with the same set of aforementioned parameters. The performance of LæP was evaluated by average surface roughness (Ra) spectrum at different spatial wavelength intervals along the laser path trajectory. Additionally, statistical measures, such as power spectral density (PSD) function, transfer function (TF) and material ratio (MR) curve were analyzed in order to establish the process parameters resulting the best possible surface quality. From the analysis of this experimental investigation, surface quality improvement up to 78.5% and 75.7% were reported for the spatial wavelength interval of 50-100 æm for IN718 and H13 tool steel respectively. As a next step, two dimensional (2D) areal polishing of micromilled IN718 and H13 tool steel were performed, where surface quality improvement up to 69.32% and 77.28% were observed for the spatial wavelength interval of 50-100 æm for IN718 and H13 tool steel, respectively. Overall, ps LæP was found to be an effective way of enhancing desired surface quality as demonstrated by the reduction of surface asperities as well as their volumetric uniform redistributions.

Download or read book Advanced Machining and Finishing written by Kapil Gupta and published by Elsevier. This book was released on 2021-04-17 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Machining and Finishing explains the background theory, working principles, technical specifications, and latest developments in a wide range of advanced machining and finishing techniques. The book includes valuable technical information, tables of data, and diagrams to assist machinists. Drawing on the work of experts in both academia and industry, coverage addresses theoretical developments as well as practical improvements from R&D. With over 25 important processes, from electro-chemical machining to nano-machining and magnetic field assisted finishing, this is the most complete guide to this subject available. This unique guide will allow readers to compare the characteristics of different processes, understand how they work, and provide parameters for their effective implementation. This is part of a 4 volume set entitled Handbooks in Advanced Manufacturing, with the other 3 addressing Advanced Welding and Deforming, Additive Manufacturing and Surface Treatment, and Sustainable Manufacturing Processes. Provides the theory, operational parameters, and latest developments in over 25 different machining and finishing processes Addresses both traditional and non-traditional machining methods Introduces basic concepts in an introductory chapter, helping readers from a range of backgrounds to engage with the subject matter

Download or read book NBS Special Publication written by and published by . This book was released on 1974 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Machining Joining and Modifications of Advanced Materials written by Andreas Öchsner and published by Springer. This book was released on 2016-06-23 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest advances in mechanical and materials engineering applied to the machining, joining and modification of modern engineering materials. The contributions cover the classical fields of casting, forming and injection moulding as representative manufacturing methods, whereas additive manufacturing methods (rapid prototyping and laser sintering) are treated as more innovative and recent technologies that are paving the way for the manufacturing of shapes and features that traditional methods are unable to deliver. The book also explores water jet cutting as an innovative cutting technology that avoids the heat build-up typical of classical mechanical cutting. It introduces readers to laser cutting as an alternative technology for the separation of materials, and to classical bonding and friction stir welding approaches in the context of joining technologies. In many cases, forming and machining technologies require additional post-treatment to achieve the required level of surface quality or to furnish a protective layer. Accordingly, sections on laser treatment, shot peening and the production of protective layers round out the book’s coverage.

Download or read book Advances in Manufacturing and Processing of Materials written by Narendra Kumar and published by CRC Press. This book was released on 2024-08-23 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new volume examines important research on advancements in materials and manufacturing processes, focusing on characterization and applications and defining solutions to current issues as well as for inspiration for future innovation. It looks at areas including material characterization using modern technologies, process characterization, and more. The diverse selection of topics includes additive manufacturing for medical implants and medical image processing, characterization of composite materials using natural and synthetic fibers, 3D and 4D printing technologies and applications, biodegradable packaging materials, manufacturing and processing of materials for novel drug delivery systems, and more.

Download or read book Proceedings of the 3rd International Conference on Advanced Surface Enhancement INCASE 2023 written by Niroj Maharjan and published by Springer Nature. This book was released on with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser and Photonic Systems written by Shimon Y. Nof and published by CRC Press. This book was released on 2014-05-12 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: New, significant scientific discoveries in laser and photonic technologies, systems perspectives, and integrated design approaches can improve even further the impact in critical areas of challenge. Yet this knowledge is dispersed across several disciplines and research arenas. Laser and Photonic Systems: Design and Integration brings together a multidisciplinary group of experts to increase understanding of the ways in which systems perspectives may influence laser and photonic innovations and application integration. By bringing together chapters from leading scientists and technologists, industrial and systems engineers, and managers, the book stimulates new thinking that would bring a systems, network, and system-of-systems perspective to bear on laser and photonic systems applications. The chapters challenge you to explore opportunities for revolutionary and broader advancements. The authors emphasize the identification of emerging research and application frontiers where there are promising contributions to lasers, optics, and photonics applications in fields such as manufacturing, healthcare, security, and communications. The book contains insights from leading researchers, inventors, implementers, and innovators. It explains a variety of techniques, models, and technologies proven to work with laser and photonic systems, their development, design, and integration. Such systems are of growing interest to many organizations, given their promise and potential solutions of grand societal challenges. Lastly, the book helps you leverage the knowledge into exciting new frontiers of successful solutions.

Download or read book Handbook of Research on Advancements in Manufacturing Materials and Mechanical Engineering written by Burstein, Leonid and published by IGI Global. This book was released on 2020-09-18 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Production, new materials development, and mechanics are the central subjects of modern industry and advanced science. With a very broad reach across several different disciplines, selecting the most forward-thinking research to review can be a hefty task, especially for study in niche applications that receive little coverage. For those subjects, collecting the research available is of utmost importance. The Handbook of Research on Advancements in Manufacturing, Materials, and Mechanical Engineering is an essential reference source that examines emerging obstacles in these fields of engineering and the methods and tools used to find solutions. Featuring coverage of a broad range of topics including fabricating procedures, automated control, and material selection, this book is ideally designed for academics; tribology and materials researchers; mechanical, physics, and materials engineers; professionals in related industries; scientists; and students.

Download or read book Micromachining written by Zdravko Stanimirović and published by BoD – Books on Demand. This book was released on 2019-11-20 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: To present their work in the field of micromachining, researchers from distant parts of the world have joined their efforts and contributed their ideas according to their interest and engagement. Their articles will give you the opportunity to understand the concepts of micromachining of advanced materials. Surface texturing using pico- and femto-second laser micromachining is presented, as well as the silicon-based micromachining process for flexible electronics. You can learn about the CMOS compatible wet bulk micromachining process for MEMS applications and the physical process and plasma parameters in a radio frequency hybrid plasma system for thin-film production with ion assistance. Last but not least, study on the specific coefficient in the micromachining process and multiscale simulation of influence of surface defects on nanoindentation using quasi-continuum method provides us with an insight in modelling and the simulation of micromachining processes. The editors hope that this book will allow both professionals and readers not involved in the immediate field to understand and enjoy the topic.