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Book Chapter
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004040
EISBN: 978-1-62708-185-6
... Abstract Machining serves as a more specialized supplement to the forging process, particularly in the formation of cavities and holes. This article provides information on the enclosures, cavities, and holes in hammer and press forgings. It provides a checklist that serves as a guide...
Abstract
Machining serves as a more specialized supplement to the forging process, particularly in the formation of cavities and holes. This article provides information on the enclosures, cavities, and holes in hammer and press forgings. It provides a checklist that serves as a guide to the procedure for reviewing the design of cavities and holes to be incorporated in forgings. The article also describes forging designs in which cavities and holes are related to rib and web designs, punchout, piercing, extruding, and combinations of these processes.
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Published: 01 January 2002
Fig. 45 Pinion with several very large cavities where metal from the surface down to the depth of the case has fallen out due to subcase fatigue. Source: Ref 24
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Published: 01 January 2002
Fig. 8 Elongated surface cavities on the inside surface of a 70-30 cupronickel tube produced by erosion-corrosion. The tube surface is clean, the attack having occurred due to brine flowing through it at 70 °C (158 °F) with turbulent flow and an excessive level of dissolved oxygen.
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in Aluminum Foundry Products
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
Fig. 12 Effect of gating system on formation of shrinkage cavities. Solidification starts at the chill and progresses toward the riser. In (a), molten metal can easily feed from the riser into the entire length of the casting. In (b), the narrow portion of the casting can freeze shut before
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Published: 01 January 1989
Fig. 10 Counterbored die casting (left) and counterboring tool. The two cavities in the die casting were counterbored to 25.30 mm (0.996 in.) in diameter with the six-flute counterbore shown. The cored hole was tapped while the casting was in position for counterboring of the first cavity
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Published: 01 January 1989
Fig. 12 Tapping six cavities in a 76 mm (3 in.) thick cast brake housing
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Published: 01 January 2005
Fig. 9 Cross sections of ribs and die cavities that illustrate forged and extruded ribs. (a) Direct forged ribs and their die cavities. (b) Extruded ribs and their die cavities. (c)–(f) Die cavities for ribs with conventional and shift draft. (g) Die cavities for deep thin ribs. (h) Die
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Published: 01 January 2005
Fig. 5 Three forgings that illustrate forged cavities produced by piercing. (a) Conventional, (b) and (c) seamless forging (cored), together with a (d) typical forging sequence for the production of ring gears. Dimensions given in inches
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Published: 01 January 2005
Fig. 12 Propeller piston forging in which forged and machined cavities were employed in combination. See Example 6 . Dimensions in figure given in inches Item Conventional forging Material AMS 4130 (aluminum alloy 2025) (a) (b) Forging operations Preblock; block; finish
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Published: 01 December 2008
Fig. 10 Shrinkage cavities produced by skin formation in alloys
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Published: 01 December 2008
Fig. 25 Examples of cored holes and cavities easily produced in investment castings
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Published: 01 December 2008
Fig. 24 Examples of cored holes and cavities easily made in investment castings. Dimensions given in inches
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Published: 01 December 2008
Fig. 9 Two types of cavities requiring different coring methods. (a) Corner radii must be sacrificed if metal cores are used. (b) Corner radii can be obtained with sand, plaster, or other expendable core material. Casting cost is higher for option (b) due to the additional operations of core
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in Effect of Neutron Irradiation on Properties of Steels[1]
> Properties and Selection: Irons, Steels, and High-Performance Alloys
Published: 01 January 1990
Fig. 1 Cavities (indicated as the white rectangles and circles) formed in type 316 stainless steel irradiated to 60 dpa at 600 °C (1110 °F) in the HFIR. Courtesy of P.J. Maziasz, Oak Ridge National Laboratory
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in Using Infrared Thermometers to Control Temperature During Induction Heating
> Induction Heating and Heat Treatment
Published: 09 June 2014
Fig. 5 Typical blackbody cavities
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in Modeling and Simulation of Cavitation during Hot Working
> Fundamentals of Modeling for Metals Processing
Published: 01 December 2009
Fig. 6 Strain and direction dependence of the size of cavities developed during hot torsion testing of Ti-6Al-4V with a colony-alpha microstructure at 815 °C and a surface effective strain rate of 0.04 s −1 . Source: Ref 41
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in Modeling and Simulation of Cavitation during Hot Working
> Fundamentals of Modeling for Metals Processing
Published: 01 December 2009
Fig. 12 Simulation predictions of the average cavity radius for cavities that do or do not coalesce ( Eq 23 ). The cavity volume fraction (C v ) is also shown on the graph.
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in Modeling and Simulation of Cavitation during Hot Working
> Fundamentals of Modeling for Metals Processing
Published: 01 December 2009
Fig. 13 Three-dimensional view of the largest coalesced cavities obtained via x-ray tomography of a sample of aluminum alloy 5083 following deformation in tension at 525 °C and 10 −4 s −1 . Source: Ref 22
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in Modeling of Cavity Initiation and Early Growth during Superplastic and Hot Deformation
> Fundamentals of Modeling for Metals Processing
Published: 01 December 2009
Fig. 8 Predictions of interface-constrained plasticity growth of cavities. (a) Effect of particle size ( R ) on growth and debonding for m = 0.3. (b) Effect of particle size, initial defect size (1 or 100 nm), and m -value on constrained growth, debonding, and subsequent unconstrained
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Published: 15 January 2021
Fig. 54 Pinion with several large cavities where metal from the surface down to the depth of the case has fallen out due to subcase fatigue. Source: Ref 36
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