Patricia popoola, gabriel farotade, olawale fatoba and olawale popoola march 2nd 2016. Keck biomedical materials lab, school of mechanical and materials engineering, washington state university, pullman, wa, usa in many applications, porous metal structures are necessary for proper and optimal. Ppt laser engineered net shaping powerpoint presentation. Laser engineering net shaping lens a new sff procession 1. Hubbard in an attempt to relate the laser engineered net shaping lens process parameters, laser power and laser travel speed, to the quality of lensproduced parts, strain measurements were taken. Such applications include laser material processing, laser material interaction studies, fiber injection systems, optical data image processing, lithography, medical applications, and military applications. Fabrication of net shape load bearing implants with complex anatomical shapes to meet desired mechanical and biological performance is still a challenge. Laser engineered net shaping lensw, 26, directed light fabrication dlf 79, and direct metal deposition 10. Fabrication of biomedical implants using laser engineered net. Laser engineered net shap ing lens process, which includes the summary of sev eral successful applications that cover a variety. Laser beam shaping optical system design methods and their application in edgeemitting semiconductor laser based lidar systems except where reference is made to the work of others, the work described in this dissertation is my own or was done in collaboration with my advisory committee. To understand processing ability and measure resultant interfacial and thermal properties of inconel 718 and copper alloy grcop84, bimetallic structures were fabricated using laser engineering net shaping lens, a commercially available additive manufacturing technique. Surface grinding of zta parts fabricated by laser engineered.
The international journal of advanced manufacturing technology, 1021, 969976. Laser engineered net shaping lens tm is a promising metal 3d printing technology to fabricate near net shape and dense parts with mechanical properties similar to that of wrought products. For the love of physics walter lewin may 16, 2011 duration. Deposition of titic composite coatings on implant structures using laser engineered net shaping g. A study of laser energy transfer efficiency, melting efficiency, and deposition efficiency has been conducted for the laser engineered net shaping process lens for h tool steel and copper powder deposits on h tool steel substrates. Therefore, this curvature can never be very strong. Application of rapid prototyping rp in ceramics manufacturing is motivated by advances in engineering ceramics where attaining complex shapes using traditional processing is difficult. Pdf additive manufacturing or rapid prototyping rp is an advanced manufacturing technology emerging as key player in both industrial. The paper seeks to investigate the laser engineered net shaping lens of metal thick. Laser powder forming, also known by the proprietary name laser engineered net shaping is an additive manufacturing technology developed for fabricating. Processing and microstructure of wcco cermets by laser. Laser engineered net shaping advances additive manufacturing. The list of acronyms and abbreviations related to lens laser engineering net shaping.
Lens 850r 3d printer for structural metals youtube. Laser engineered net shaping an overview sciencedirect topics. Functionally graded coppersteel using laser engineering net. Laser engineered net shaping manufacturing technologies sandia national laboratories has developed a new technology to fabricate threedimensional metallic components directly from cad solid models. Figure 4 shows a laser engineered net shaping lens system, a variant developed by sandia national laboratory, in operation.
Laser engineered net shaping of titaniumsilver alloy for orthopedic implant. Processing of bulk alumina ceramics using laser engineered. Lens is an alternative to classic metal manufacturing methods, such as casting and plastic working. Functionally graded copper steel using laser engineered net shaping process fredrick f. Xrd, sem, and eds are applied to analyze the phase composition and microstructure characteristics. Nicraly composites prepared by laser engineered net shaping are investigated in this study. Designers, starting with computer files can now use view techniques to see 3d images on their. Department of materials science and engineering, lehigh university, bethlehem. Laser engineered net shaping lens is a layer additive manufacturing process that creates fully dense metal components using a laser, metal powder, and a computer solid model. It has been established that lens process is capable of fabricating near. Sep 24, 2018 hu, yingbin, maharubin, shahrima, cong, weilong, and tan, george. Laser beam shaping techniques can be divided into three areas. Software development for laser engineered net shaping. It can be used with a wide range of engineering materials, although a protective atmosphere may be required for materials that oxidize readily.
Residual stress measurement of laserengineered net shaping. Pdf laser engineered net shaping process in development. Ultrasonic vibrationassisted laser engineered net shaping of inconel 718 parts. Schoenung department of chemical engineering and materials science. The theoretical basis for the development of laser was provided by albert einstein in 1917. Laser engineered net shaping an overview sciencedirect. Fabrication of titanium aluminide matrix composites by laser engineered net shaping weiping liu and john dupont department of materials science and engineering, lehigh university, bethlehem, pa 18015 abstract tialbased titanium aluminide alloys and their composites reinforced with ceramic. Pdf on aug 7, 2016, zhichao liu and others published laser engineering net shaping lens of metal powders. In 1960, the first laser device was developed by t. Each of these processes is similar in that metal particles are fed into laser beams producing near net shape three dimensional parts. Hu, yingbin, wang, hui, li, yuanchen, ning, fuda, and cong, weilong. Lens process builds components in an additive process from powdered metals using a ny.
Unit i laser engineering physics introduction laser stands for light amplification by stimulated emission of radiation. This process has previously been utilized in research settings to create metal components and new material alloys. Laser engineering net shaping of microporous ti6al4v filters. Laser engineering net shaping method in the area of. Stucker department of mechanical and aerospace engineering. Laser engineered net shaping lens, a commercial rp process, is used to fabricate dense, net. Stucker department of mechanical and aerospace engineering, utah state university.
Microstructure and mechanical properties of inconel718. Dupont department of materials science and engineering, lehigh university bethlehem, pa 18015 abstract laser engineered net shaping lens is an emerging solid freeform fabrication. Additive manufacturing with selective laser melting duration. The first part deals with introduction of innovative high technology laser engineered net shaping lens that offers a breakthrough in manufacturing, maintaining, and repairing products. Solidification modeling and microstructural characterization of alloy in718 deposited by laser engineered net shaping j. Moreover, it enables the production of finished spatial structures using different types of metallic powders as. This study focused on the effects of laser deposition processing parameters laser power, travel speed, and powder mass flow rate on laser beam absorption. Microstructural and mechanical characterization f ning, y hu, z liu, x wang, y li, w cong journal of manufacturing science and engineering 140 6, 061012, 2018. Laser engineered net shaping advances additive manufacturing and repair. Laser powder forming, also known by the proprietary name laser engineered net shaping is an additive manufacturing technology developed for fabricating metal parts directly from a computeraided design cad solid model by using a metal powder injected into a molten pool created by a focused, highpowered laser beam. Laser engineered net shaping of titaniumsilver alloy for. This process, called laser engineered net shaping lens, exhibits enormous potential to revolutionize the way in which metal parts, such as.
Laser in engineering physics 1 free pdf download the initial notable application of laser was made c on the lunar ranging experiment of apollo ii mission of 1969, when an array of retro reflectors was mounted on the surface of the moon and pulses from a ruby laser were sent from the earth. Shaping of ceramic parts by selective laser melting of powder. Application of laser engineered net shaping lens to. Pdf laser engineered net shaping process in development of. The process is similar to rapid prototyping technologies in its approach to fabricate a solid component by layer additive methods. Lensdmd is used to print parts out of metal using a print head as opposed to the dmls process. Fabrication of titanium aluminide matrix composites by laser. In this article, an overview of our research activities is discussed focusing on application of laser engineered net shaping lens toward load bearing implants to increase in vivo life time. Lens, exhibits enormous potential to revolutionize the way in which metal parts, such as complex proto. Free form fabrication of metallic components using laser.
This process, called laser engineered net shapingt lens, exhibits enormous potential to revolutionize the way in. Cmq lens process laser engineered net shaping youtube. Laser engineered net shaping companies aerospace and defense industrial biomedical electronics sandia national labs how it works uses a high power laser to melt metal. A fun presentation that gives you a good understanding of lens. Functionally graded copper steel using laser engineered net.
Pdf laser engineering net shaping lens of metal powders. Deposition of titic composite coatings on implant structures. Laser metal deposition has some important advantages. Process efficiency measurements in the laser engineered net. Laser engineered net shaping lenstm is currently a promising and developing technique.
The lens process also shows promise in producing components with graded compositions. Laser engineered net shaping lens direct metal deposition. Proceedings of the asme 2018 th international manufacturing science and engineering conference. Shaping of ceramic parts by selective laser melting of powder bed volume 29 issue 17 enrique juste, fabrice petit, veronique lardot, francis cambier skip to main content accessibility help we use cookies to distinguish you from other users and to provide you with a better experience on our websites. This paper focuses on laser engineered net shaping lens technique to fabricate the medical implants from bio materials. For many years, sandia national laboratories has been involved in the development and application of rapid prototyping and dmect fabrication technologies to build prototype parts and patterns for investment casting. Laser engineered net shaping sandia national laboratories. Laser engineered net shaping lens uses computercontrolled lasers that, in hours, weld airblown streams of metallic powders into custom parts and. Laser engineered net shaping free download as powerpoint presentation. Residual stress measurement of laser engineered net shaping aisi 410 thin plates using neutron diffraction p. The mechanical properties are evaluated by microhardness tester and friction.
Materials free fulltext static and dynamic loading. Chapter 6 passive modelocking as we have seen in chapter 5 the pulse width in an actively modelocked laser is inverse proportional to the fourth root of the curvature in the loss modulation. Laser engineered net shaping lens is an emerging solid freeform fabrication sff process capable of producing fully dense metallic parts with complex shapes directly from a computeraided drawing cad without the need for molding or tooling. In active modelocking one is limited to the speed of electronic signal generators. Surface grinding of zta parts fabricated by laser engineered net shaping process. A free powerpoint ppt presentation displayed as a flash slide show on id.
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