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  • Siemens successfully tests 3D printed gas turbine blades ...

    2017-2-6 · In a development that’s been hailed as a major step forward in the use of additive manufacturing to produce critical functional components, engineers at Siemens have completed full load engine tests for additively produced gas turbine blades…

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  • Effect of modification on microstructure and mechanical ...

    Superalloy René 77 is very wide used for turbine blades, turbine disks of aircraft engines which work up to 1050°C. These elements are generally produced by the investment casting method.

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  • Developments in investment casting process—A review ...

    2012-11-1 · Kotzin (1981) stated that this process was used for several centuries for making jewellery, idols and art castings. Such jewellery castings have been found not only in the treasures of the Pharaohs of Egypt, Inca tombs of Central/South America, but also, in Europe, the ancient Etruscans, the Greeks, etc. Fig. 2 shows one such casting, the Byzantines investment-cast earring.

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  • Additive manufacturing of metallic components – Process ...

    2018-3-1 · 2.1. Manufacturing processes for alloys. The AM processes fall into two categories defined by ASTM Standard F2792 as Directed Energy Deposition (DED) and Powder Bed Fusion (PBF). A further distinction is provided as a function of the primary heat source; we will use the nomenclature for laser (L), electron beam (EB), plasma arc (PA), and gas metal arc (GMA) heat sources as PBF-L, PBF-EB, …

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  • DYNAMIC BALANCING OF ROTATING MACHINERY

    2015-2-5 · assembly tolerances, distortions due to heat treatment, blow holes or inclusions in castings, and material non-homogeneity. Because of these irregularities the actual axis of rotation does not coincide with one of the principal axes of inertia of the body, and variable disturbing forces are produced which result in vibrations.

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  • Production issues in the manufacturing of TiAl turbine ...

    Additional prototypes of turbine blades having smaller di mensions have al so been produced starting from an Inconel 718 (nickel-chromium base d austenitic superalloy) blade (figu re 4). Figure 4.

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  • (PDF) Additive Manufacturing for the Aircraft Industry: A ...

    2019-2-18 · investment casting [81]. e res ults showed that turbine blades can be made based on dimensionally accurate and integral ceramic mo ulds produced by the indirect applica tion of stereolithograph y.

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  • Aero-Engines - an overview

    High pressure (HP) and Intermediate pressure (IP) gas turbines blades under normal operating conditions are in rubbing contact against a turbine seal which is manufactured in circumferential segments [4]. The segments are manufactured as single piece castings in CMSX4 alloy (a single crystal nickel superalloy), chosen to mitigate the oxidizing ...

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  • Gas turbine coatings – An overview - ScienceDirect

    2012-12-1 · As the gas turbine is working in the most demanding environment , it uses a variety of coatings for its different components. Fig. 1 shows the sketch of application of various types of coatings in a gas turbine. Erosion resistant coatings are applied to the compressor blades and vanes.

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    Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.

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  • Magnetically assisted slip casting of bioinspired ...

    2015-9-21 · The magnetically assisted slip-casting (MASC) process. Gypsum moulds were prepared according to the supplier’s specification using regular tap water and a powder/liquid volume ratio of 2:1 ...

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  • Surgery of the turbinates and “empty nose” syndrome

    2011-4-27 · The functional tasks of the middle turbinate comprise the heating and humidifying of the inhaled air; in addition they direct air flow towards the olfactorily significant areas at the frontal base. At the same time they prevent a turbulent flow in the middle nasal meatus, and thus indirectly support mucociliary clearance.

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  • Fire-Safe Polymer Composites: Flame-Retardant Effect of ...

    2021-2-12 · During combustion, char-type flame retardants combine the fuel with non-pyrolytic carbon (char) to prevent fuel release and provide thermal insulation to the base polymer by forming a protective char layer [50,51,52,53,54,55,56].In other words, the flame retardant causes charring on the polymer surface through dehydration of the flame retardant to generate double bonds in the polymer [57,58,59 ...

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  • US7316850B2 - Modified MCrAlY coatings on turbine blade ...

    There is provided a method for depositing a modified MCrAlY coating on a turbine blade tip. The method utilizes laser deposition techniques to provide a metallurgical bond between a turbine blade substrate, such as a superalloy substrate, and the modified MCrAlY composition. Further the modified MCrAlY coating has sufficient thickness such that a post-welding grinding operation to size the ...

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  • IntechOpen - Open Science Open Minds

    IntechOpen is a leading global publisher of Journals and Books within the fields of Science, Technology and Medicine. We are the preferred choice of over 60,000 authors worldwide.

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  • 2 Materials Development: The Process

    For example, gamma TiAl is scheduled to be used by General Electric as low-pressure turbine blades on its GEnx (GE next-generation) engine, which will power the Boeing 787 and Boeing 747-8 aircraft. This is the first large-scale use of this material on a …

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  • Two-equation eddy-viscosity turbulence models for ...

    2021-2-10 · Two-equation eddy-viscosity turbulence models for engineering applications. F. R. Menter. F. R. Menter. NASA Ames Research Center, Moffett Field, California 94035. Search for …

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  • 5_14050341007_Abdelrahman-Alsharqawi.pdf - ANKARA

    3 ABSTRACT Investment casting has been used to manufacture weapons, jewelry, and art castings during the ancient civilization. Today, its applications include jewelry/art castings, turbine blades, and many more industrial/scientific components. The following report will talk about the complete process of investment casting. In addition, one literature review is included.

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  • Water droplet erosion mechanism of nearly fully-lamellar ...

    A recent initiative sponsored by the United States Air Force has focused on the major drivers for such failures in Ti-6Al-4V, a commonly used turbine blade alloy, specifically for fan and ...

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  • Large-scale additive manufacturing with bioinspired ...

    2018-6-5 · Figure 4. Additive manufacture of fungus-like materials. ( a) Design of the wind turbine blade fully made of FLAM. The inner core of the blade, built by additive manufacturing, is designed to ...

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  • ISONIC 3510

    2021-5-4 · Versatile Fully Parallel PA Functionality Out of the Same Unit - from 2 X 16:16 and 1 X 32:32 to 2 X 64:64 and 1 X 128:128 Fully parallel 1 X 64:64 functionality of ISONIC 3510 may be provided with the use of one S 4922A064D032 active functionality extension adapter connected to …

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  • The 2016 Thermal Spray Roadmap

    2016-12-1 · Very Low-Pressure Plasma Spray (VLPPS) refers to the entire family of very low-chamber-pressure plasma spray technologies as described in the three bullets above. While chamber pressures in traditional LPPS systems are on the order of 5-20 kPa (37-150 Torr), VLPPS systems operate at pressures more in the range of 100-500 Pa (0.75-3.75 Torr).

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  • How 3-D printing will transform the metals industry

    2017-8-2 · Article (PDF-2MB) Today, 3-D printing is a very small part of the metals industry, but it is growing rapidly and this market is expected to be worth as much as 10 billion by 2030 to 2035. 1. 1. Wohlers Associates; Euler Hermes; LulzBot. Already, a number of healthcare and aerospace companies have adopted the technology.

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  • Best 3D Printing Software in 2021 - 360Quadrants

    Best 3D Printing Software. 3D printing is the process of building up a real 3D object from a digital model by joining thin layers of materials (which might be in solid, powder, or liquid forms), normally one layer above the other in horizontal cross-section, unlike subtractive manufacturing methods.

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  • Honorary Professor Robert J. Wilkinson MA (Cambridge)

    2021-8-24 · Senior Group Leader at The Francis Crick Institute, London; and Wellcome Senior Fellow in Clinical Science at Imperial College London [both posts seconded to the University of Cape Town]; Director, Centre for Infectious Diseases Research in Africa (CIDRI-Africa); Group leader and Director, Crick African Network; and Member, Institute of Infectious Disease and Molecular Medicine; …

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  • Latest Market Research Insights

    Autonomous Professional Cleaning Robot Market Size, Share & Trends Analysis Report, Competitive Strategies, 2020. Published Date: June, 2020 The global autonomous professional cleaning robot market is expected to witness significant growth over the forecast period, according to a new study by Grand View Research, Inc.

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  • US5121329A - Apparatus and method for creating three ...

    Apparatus incorporating a movable dispensing head provided with a supply of material which solidifies at a predetermined temperature, and a base member, which are moved relative to each other along 'X,' 'Y,' and 'Z' axes in a predetermined pattern to create three-dimensional objects by building up material discharged from the dispensing head onto the base member at a controlled rate.

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  • Chapter 11-Metal Casting Processes

    2021-2-14 · Chapter 11-Metal Casting Processes - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. material science

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  • China National Knowledge Infrastructure --- Download

    China National Knowledge Infrastructure --- Download Paper. Science-Engineering (A) Recent Updated Papers. • An investigation of the disease of the Hongqingsi Grottoes and an elementary research for the prevention. • Research of efflorescent mechanism of the stone carvings in Song Imperial Mausoleums and the preventive measures.

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  • Technique for Achieving a Passive Framework Fit: A ...

    2004-4-1 · The importance of achieving a passive fit between a cast metal framework or bar and the supporting implant abut-ments is frequently cited in the dental literature as essential for the long-term success of an implant-supported restoration.1–3 The “passive fit” concept, however, remains controversial and only partially understood.2 At present, there is no clear consensus as to what ...

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  • Prof. Dr.-Ing. Hans Jürgen Maier – Institut für ...

    Nicolaus, M.; Möhwald, K.; Maier, H. J. (2017): Regeneration of High Pressure Turbine Blades. Development of a Hybrid Brazing and Aluminizing Process by means of Thermal Spraying , The 5th International Conference on Through-Life Engineering Services.

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  • Two-equation eddy-viscosity turbulence models for ...

    2021-2-10 · Two-equation eddy-viscosity turbulence models for engineering applications. F. R. Menter. F. R. Menter. NASA Ames Research Center, Moffett Field, California 94035. Search for …

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  • Best 3D Printing Software in 2021 - 360Quadrants

    Best 3D Printing Software. 3D printing is the process of building up a real 3D object from a digital model by joining thin layers of materials (which might be in solid, powder, or liquid forms), normally one layer above the other in horizontal cross-section, unlike subtractive manufacturing methods.

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  • EUR-Lex - 02009R0428-20171216 - EN - EUR-Lex

    2017-12-16 · 3. An authorisation shall also be required for the export of dual-use items not listed in Annex I if the exporter has been informed by the authorities referred to in paragraph 1 that the items in question are or may be intended, in their entirety or in part, for use as parts or components of military items listed in the national military list that have been exported from the territory of that ...

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  • EASA PART 66 GUIDE: EASA Part 66 : Gas Turbine Question

    2021-8-23 · Option B. The turbine wheel has a shroud or duct which provides cooling air to the turbine blades. Option C. The turbine wheel is enclosed by a protective shroud to contain the blades in case of failure. Correct Answer is. The turbine blades are shaped so that their ends form a band or shroud. Explanation. Jeppesen A&P Powerplant Textbook 3-28.

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  • Sci-Hub

    The Sci-Hub project supports Open Access movement in science. Research should be published in open access, i.e. be free to read. The Open Access is a new and advanced form of scientific communication, which is going to replace outdated subscription models.

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  • Blending Plastics, Mixing Composites - Mixers

    Graphite, a highly conductive crystalline form of carbon, is used in a wide range of products, from batteries, heat sinks and solar cells to coatings, lubricants and composites. Recommended Blending & Drying Equipment for Nylon Pellets. Nylon pellets are commonly blended with other plastics, coated with a powdered lubricant or mixed with ...

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  • Chapter 11-Metal Casting Processes

    2021-2-14 · Chapter 11-Metal Casting Processes - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. material science

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  • China National Knowledge Infrastructure --- Download

    China National Knowledge Infrastructure --- Download Paper. Science-Engineering (A) Recent Updated Papers. • An investigation of the disease of the Hongqingsi Grottoes and an elementary research for the prevention. • Research of efflorescent mechanism of the stone carvings in Song Imperial Mausoleums and the preventive measures.

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  • Defense Trade Cooperation Munitions List 2013

    2021-2-23 · Part 1A — Preliminary. 1 Name of list. This list is the Defense Trade Cooperation Munitions List 2013. 2 Commencement. This list commences on the commencement of section 36 of the Defence Trade Controls Act 2012. 3 Authority. This list is made under section 36 …

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  • CSC 297 Robot Construction: Materials

    2018-1-31 · Except for bricks, which were not usually thought of as ceramics. This started to change in the mid 20th century when architects began using glass as a load-bearing material. Today high-tech ceramics are important structural materials in applications ranging from electrical insulators, to bearings, to gas turbine blades.

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  • Federal Register :: Wassenaar Arrangement 2016 Plenary ...

    2017-8-15 · 2. For the purposes of 1B001, a `filament band' is a single continuous width of fully or partially resin-impregnated tape, tow or fiber. Fully or partially resin-impregnated `filament bands' include those coated with dry powder that tacks upon heating. Start …

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  • IJERT – International Journal of Engineering Research ...

    2021-8-24 · International Journal of Engineering Research & Technology is a peer-reviewed, open access and multidisciplinary engineering, technology and science journal that publishes original research & review articles of all major branches of Engineering, Science and Technology. We have adopted a fully open access publishing model which allows open global access to its published content so anyone …

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  • X-ray computed tomography

    2021-2-25 · X-ray computed tomography (CT) can reveal the internal details of objects in three dimensions non-destructively. In this Primer, we outline the …

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  • Biomimetics: lessons from nature–an overview ...

    Inspired by this, Fish (2006) designed wind turbine blades with tubercles approximately 0.7 m tall . Based on wind tunnel tests, his group reported that blades with tubercles, as compared with those without tubercles, exhibited an increase in the angle of attack (the angle that a blade makes into the incident wind) from 11 to 17° prior to ...

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  • Guide to Manufacturing Processes for Plastics

    Casting: The synthetic resin is mixed with a curing agent and poured or injected into the mold, where it fills the mold cavity. Cure: The casting cures in the mold until it solidifies (subjecting the mold to heat can accelerate the cure time for certain polymers). De-mold: The mold is …

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  • Research and Markets - Market Research Reports - Welcome

    2021-2-27 · Accurate market data is crucial to a successful business strategy. We’re dedicated to delivering you the information you need. My experience with Research and Markets’ Customer Experience Team was great. My enquiries were responded to very quickly and they also assisted me a lot during and after ...

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  • PRWeb

    2021-8-24 · May 5, 2020 This piece was originally published on Cision.com. The press release is a powerful tool. In fact, 72% of journalists say the press release is one of the most useful types of content a PR pro can deliver.

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  • BMW i3 (2014) - pictures, information & specs

    2021-8-23 · The electric motor powering the BMW i3 generates a maximum output of 125 kW/170 hp and peak torque of 250 Newton metres (184 lb-ft). Its instantaneous power flows to the rear wheels via a single-speed transmission. The motor sources its energy …

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  • Technique for Achieving a Passive Framework Fit: A ...

    2004-4-1 · The importance of achieving a passive fit between a cast metal framework or bar and the supporting implant abut-ments is frequently cited in the dental literature as essential for the long-term success of an implant-supported restoration.1–3 The “passive fit” concept, however, remains controversial and only partially understood.2 At present, there is no clear consensus as to what ...

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  • Microfeatures and microfabrication: current role of micro ...

    2019-2-14 · Abstract. The field of microfeatures and microdevices is an emergent field, with applications extending from cooling of turbine blades to drug delivery in the human body. Fabrication of these features, microfabrication, is a challenge as it requires precise …

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  • 3-D printing: A tool for production - C&EN

    2017-10-16 · 3-D printing: A tool for production. Credit: Ultimaker. At its Autoeuropa factory in Portugal, where it assembles 100,000 cars a year, Volkswagen has deployed a …

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  • Chapter 1301:7-7 - Ohio Administrative Code

    a. In severe climates, the fire code official shall have the authority to modify the emergency evacuation drill frequency. b. Emergency evacuation drills are required in Group B buildings having an occupant load of 500 or more persons or more than 100 persons above or below the lowest level of exit discharge.

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  • 22 CFR § 121.1 - The United States Munitions List.

    2021-8-3 · * (d) Fully automatic shotguns regardless of gauge. * (e) Silencers, mufflers, and sound suppressors. (f) [Reserved] (g) Barrels, receivers (frames), bolts, bolt carriers, slides, or sears specially designed for the articles in paragraphs (a), (b), and (d) of this category. (h) Parts, components, accessories, and attachments, as follows: (1) Drum and other magazines for firearms to .50 caliber ...

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  • 6 steps to EN 9100 certification - Aerospace Manufacturing ...

    2018-8-17 · The developed methodology has already been put into practice as part of the certification of Access e.V. according to EN 9100 for production of titanium aluminide turbine blades. Access e.V. is an institute for scientific research and development of materials and processes with a focus on metal casting…

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    Subaru's EJ255 engine was a turbocharged 2.5-litre horizontally-opposed (or 'boxer') four-cylinder engine. For Australia, the EJ255 engine was introduced in the Subaru SG Forester XT in 2003, but subsequently offered in the GD/GG Impreza WRX and BL Liberty GT (see table below). Developed in conjunction with the more powerful EJ257 engine, key features for the EJ255 engine included its:

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  • Materials Research

    The 2.25Cr fraction three-quarters 1.0Mo steel is widely used in petroleum refining units, for example, in pressure vessels, working under severe operational conditions.

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  • A Review of Additive Manufacturing - Hindawi

    2012-8-16 · Additive manufacturing processes take the information from a computer-aided design (CAD) file that is later converted to a stereolithography (STL) file. In this process, the drawing made in the CAD software is approximated by triangles and sliced containing the information of each layer that is going to be printed. There is a discussion of the relevant additive manufacturing processes and ...

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