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near-net shape manufacturing

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Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006498
EISBN: 978-1-62708-207-5
...Abstract Abstract Semisolid casting is a near-net shape manufacturing process capable of producing thick- and thin-walled complex-shaped components having excellent mechanical and functional performance. This article begins with a discussion on the history of semisolid processing...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003728
EISBN: 978-1-62708-177-1
... to a level of above 1" at room temperature and reasonable room temperature ductility in the as-cast condition. Finally, it provides information on the microstructures produced through various near-net shape manufacturing processes. directional solidification ductility grain refinement heat-resistant...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005611
EISBN: 978-1-62708-174-0
.... Electron beam additive manufacturing (EBAM), electron beam free-form fabrication (EBFFF or EBF 3 ), electron beam melting (EBM), and electron beam direct manufacturing (EBDM) are several of the acronyms used to describe various processes that correlate to the use of an EB power source for near-net shape...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003040
EISBN: 978-1-62708-200-6
..., torsional stability, and damage resistance. Many intricate material placement techniques can be transferred to and modified for composite prepreg fabrication processes. The extension of two-dimensional braiding to three-dimensional braiding has opened up new opportunities in the near-net shape manufacturing...
Book Chapter

By Frank K. Ko
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003361
EISBN: 978-1-62708-195-5
.... The extension of two-dimensional braiding to three-dimensional braiding has opened up new opportunities in the near-net shape manufacturing of damage-tolerant structural composites. In the braiding process, two or more systems of yarns are intertwined in the bias direction to form an integrated structure...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001101
EISBN: 978-1-62708-162-7
... been used to fabricate MMCs. Solidification processing offers a near-net-shape manufacturing capability, which is economically attractive. Developers have explored various liquid metal techniques that use multifilament yarns, chopped fibers, or particulates as the reinforcement. A castable ceramic...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005337
EISBN: 978-1-62708-187-0
... on the development of net-shape or near-net-shape technologies to make titanium alloy components more competitive ( Ref 3 ). These titanium net-shape technologies include powder metallurgy (P/M), superplastic forming (SPF), precision forging, and precision casting. Precision casting is by far the most fully...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006140
EISBN: 978-1-62708-175-7
... of the manufacturing process compared with the weight of the component installed in the aircraft. The technique is used to fabricate complex near net shapes with initial shape created using ceramic molds and in the past ten years utilizing carefully shaped metal cans and mild steel inserts. HIP process simulation...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003985
EISBN: 978-1-62708-185-6
... 2. Shah S.N. and McKeogh J.D. , “Status of Near Net Shape Forging for Major Aerospace Applications,” Paper MF83-908, Society of Manufacturing Engineers , 1983 3. Kuhlman G.W. and Nelson J.W. , “Precision Forging Technology: A Change in the State-of-the-Art...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005632
EISBN: 978-1-62708-174-0
... deposition, and LAM (laser additive manufacturing). Fig. 9 Laser-engineered net shape process. Courtesy of Castle Island Co. In comparison with conventional cladding methods, a near-net-shaped feature or part is designed and the control sequence for deposition of the feature is planned using...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005509
EISBN: 978-1-62708-197-9
..., and manufactured into a near-net shape using commercial Ti-6Al-4V powder. The casing, as shown in Fig. 5 , consists of an axial-symmetric cylindrical body with two bosses, two edge flanges, two body rings, and two reinforced ribs. The whole design and manufacturing process involved the initial prediction...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006074
EISBN: 978-1-62708-175-7
... of the preform, refine the sintered grain structure, and produce deformation texture allowing production of a part with mechanical properties dependent primarily on chemistry and heat treatment. Both forging preforms and near-net-shape parts produced by CIP facilitate production of prototype parts with reduced...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004024
EISBN: 978-1-62708-185-6
... <xref rid="a0004024-ref9" ref-type="bibr">(Ref 9)</xref> Hot isostatic pressing (HIP) is a powder metallurgical process for consolidating materials such as ceramics and refractory metals. A major benefit of using P/M molds is the ability to produce near net shape cavities directly by HIP. Hot isostatic pressing has great potential...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006045
EISBN: 978-1-62708-175-7
... provides direct formation of dimensionally controlled near-net shape components of desirable compositions. The advantages of this technique are high productivity, minimum or no machining required, low scrap rate, and low cost. The disadvantage is the limitation in the size of die pressed parts...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006042
EISBN: 978-1-62708-175-7
... sensitive to residual porosity, and HIP PM materials typically have excellent fatigue resistance. Current HIP PM technology enables the production of both simple and complex net and near-net shapes. Thus, the HIP PM process route offers an alternative to casting and forging in metal parts production...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005682
EISBN: 978-1-62708-198-6
... on near-net shape processing. Some specific problems associated with currently-used implant manufacturing processes and the consequent compromise in properties are listed as follows: The manufacturing is based on conventional casting and forging of components, followed by material-removal steps...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003986
EISBN: 978-1-62708-185-6
... the technology for forging spiral bevel gears with near-net teeth ( Ref 8 ). The focus of the program was to develop computer techniques to the design and manufacture of the gear dies. A flashless forging process was designed and forging trials were conducted that demonstrated: CAD/CAM methods could...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006549
EISBN: 978-1-62708-290-7
...-energy deposition system applied to produce a complex IN-718 alloy casing, which is also shown in the completed near-net form. Courtesy of RPM Innovations Fig. 28 Images of electron-beam-based directed-energy deposition of Ti-6Al-4V alloy during deposition, the completed near-net shape...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003972
EISBN: 978-1-62708-185-6
.... In addition, the metallurgical changes in hot working are much different from those in cold working of the material. Benefits and Disadvantages of Deformation Processes Geometric Features A major benefit of deformation processing is the ability to produce a near-net shape. Since hard tooling is used...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004000
EISBN: 978-1-62708-185-6
... types to reduce the cost of the final part through the fabrication of near-net shapes requiring less machining. A primary application for titanium alloy rolled rings is rotating and nonrotating turbine engine components. Forward or Backward Extrusion Forward or backward extrusion is a variant...