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rheocasting
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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005274
EISBN: 978-1-62708-187-0
... Abstract This article illustrates various rheocasting processes. These include new rheocasting, semisolid rheocasting, subliquidus casting, rheo-diecasting, swirled enthalpy equilibration device process, slurry-on-demand process, and continuous rheoconversion processes. rheocasting...
Image
Published: 01 December 2008
Fig. 5 Schematic of the rheocasting semisolid metal (SSM) route compared to thixocasting. MHD, magnetohydrodynamic; GR, grain refining
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Published: 01 December 2008
Fig. 2 Schematic of UBE's New Rheocasting (NRC) process. Source: Ref 1
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Published: 01 December 2008
Fig. 3 Schematic of Massachusetts Institute of Technology's Semisolid Rheocasting (SSR) process. Source: Ref 2
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Image
Published: 30 November 2018
Fig. 21 Other castings produced by low-solid-fraction rheocasting. (a) Gear train. Courtesy of GISSCO Company Limited. (b) Casting from a marine application produced from Magsimal59 and used in the T5 temper. Courtesy of RheoMetal AB
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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
... claimed for semisolid casting. It describes the four notable processes used to produce semisolid castings: thixocasting, rheocasting, thixomolding, and wrought processes. Most commercial aluminum semisolid casters use either thixocasting or rheocasting. The article discusses the die design, process...
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 and the advantages claimed for semisolid casting. It describes the four notable processes used to produce semisolid castings: thixocasting, rheocasting, thixomolding, and wrought processes. Most commercial aluminum semisolid casters use either thixocasting or rheocasting. The article discusses the die design, process conditions, and simulation for semisolid casting. It concludes with a review of several components produced by each of the various semisolid casting processes.
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005272
EISBN: 978-1-62708-187-0
...: thixocasting, rheocasting, and thixomolding. rheocasting semisolid metal casting thixocasting thixomolding SEMISOLID METAL (SSM) PROCESSING, also known as semisolid metal casting, semisolid forming, or semisolid metal forging, is a special die casting process wherein a partially solidified metal...
Abstract
Semisolid metal (SSM) processing, also known as semisolid metal casting, semisolid forming, or semisolid metal forging, is a special die casting process. This article discusses the origin and advantages of the SSM processing. It describes three major semisolid processing routes: thixocasting, rheocasting, and thixomolding.
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005224
EISBN: 978-1-62708-187-0
... stress. It illustrates the microstructural formation of semisolids under forced convection. The article concludes with an illustration that compares two SSM processes, namely, thixocasting and rheocasting. microstructual formation rheocasting semisolid metal processing thixocasting viscosity...
Abstract
Semisolid metal (SSM) processing is a special die casting process, where partially solidified metal slurry is injected into a die cavity to form die cast components. This article discusses the flow behavior of an SSM slurry with emphasis on viscosity, rheological behavior, and yield stress. It illustrates the microstructural formation of semisolids under forced convection. The article concludes with an illustration that compares two SSM processes, namely, thixocasting and rheocasting.
Image
in Aluminum Foundry Products
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
Fig. 9 Semisolid-metal processing with a rheocaster. Commercial semisolid-metal processing is based on thixocasting.
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Published: 30 November 2018
Fig. 19 Brackets for trucking applications produced by high-solid-fraction rheocasting. Courtesy of Shenzhen Silver Basis Technology Co.
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Published: 30 November 2018
Fig. 20 Three low-solid-fraction rheocast components produced for electronics applications. Courtesy of Fujian KinRui Hi-Tech Co., Ltd
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Image
Published: 01 December 2008
Fig. 7 Schematic of semisolid metal (SSM) processing routes: thixocasting versus rheocasting. MHD, magnetohydrodynamic; GR, grain refinement
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in Aluminum Foundry Products
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
Fig. 8 Comparison of aluminum alloy 357 (Al-7Si-0.5Mg). (a) A dendritic microstructure from conventional casting. (b) A nondendritic microstructure formed during rheocasting or thixocasting. Both 200×
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Published: 01 December 2008
the dendrite arm spacing. Thixocasting and rheocasting display nondendritic microstructures in which the αAl phase is present as nonconnected spheroids. Source: Ref 5
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Book Chapter
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006574
EISBN: 978-1-62708-210-5
... die casting and its derivatives processes, such as semisolid metalcasting (thixocasting), slurry-on-demand (rheocasting), and squeeze casting. Fluidity in die casting is somewhat lower than Silafont-36 (alloy 365.0), due to its lower silicon content. However, the tendency for shrinkage formation...
Abstract
The aluminum alloys 367.0 and 368.0 are high-performance, low-iron, die-casting alloys that rely on strontium for die soldering resistance. In these alloys, the lower iron content minimizes the formation of needle-like, Al-Fe-Si phases that can deteriorate strength, elongation and fatigue behavior. This datasheet provides information on key alloy metallurgy, processing effects on tensile properties, and fabrication characteristics of these 3xxx series alloys.
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005187
EISBN: 978-1-62708-187-0
... Rheocasting (slurry) Nonferrous 5 No Small to medium Outstanding Thixomolding (granular magnesium) Magnesium 5 No Small Outstanding NA, not applicable. (a) Productivity rankings: 1 = low productivity; 5 = high productivity Comparison of several casting methods Table 2...
Abstract
This article discusses the categories and subcategories of shape casting processes. These include single-use processes such as sand, plaster, ceramic, and graphite molding; essentially unpressurized multiuse processes, such as permanent mold; and high-pressure metal mold methods, such as die casting, squeeze casting, and semisolid processing. The article contains tables that compare some of the typical capabilities of shape casting processes.
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005266
EISBN: 978-1-62708-187-0
.... The feed material for SSM casting shown in Fig. 3 is aluminum A357. Feed material is typically 50 to 60% solid, with a globular microstructure comprised of solid spheroids suspended in the melted portion to produce the consistency shown. There are three types of SSM processes: thixocasting, rheocasting...
Abstract
This article provides a comprehensive discussion on die casting alloy types and casting processes used in high-pressure die casting. It presents the advantages and disadvantages of high-pressure die casting and describes the product design for the process. The article concludes with information on the metal injection process of high-pressure die casting.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003163
EISBN: 978-1-62708-199-3
... minimizes material and energy use, produces net shape components, and offers a selective reinforcement capability. Both discontinuous and continuous aluminum-copper, aluminum-silicon, and aluminum-magnesium alloys reinforced with up to 45 vol% SiC have been produced. Rheocast Aluminum MMCs...
Abstract
Metal-matrix composites (MMCs) are a class of materials with potential for a wide variety of structural and thermal applications. This article discusses the mechanical properties of MMCs, namely aluminum-matrix composites, titanium-matrix composites, magnesium-matrix composites, copper-matrix composites, superalloy-matrix composites, and intermetallic-matrix composites. It describes the processing methods of discontinuous aluminum MMCs which include casting processes, liquid-metal infiltration, spray deposition and powder metallurgy. The article provides useful information on aluminum MMC designation system and also describes the types of continuous fiber aluminum MMCs, including aluminum/boron MMC, aluminum/silicon carbide MMC, aluminum/graphite MMC, and aluminum/alumina MMC.
Book Chapter
Book: Composites
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003420
EISBN: 978-1-62708-195-5
..., spheroidal solids floating in the liquid. Stirring at high speeds creates a high shear rate, which tends to reduce the viscosity of the slurry even at solid fractions as high as 50 to 60% volume. The process of casting such a slurry is called rheocasting . The slurry can also be mixed with particulates...
Abstract
Metal-matrix composites (MMCs) are a class of materials with a wide variety of structural, wear, and thermal management applications. This article discusses the primary processing methods used to manufacture discontinuous aluminum MMCs, namely, high-pressure die casting, pressure infiltration casting, liquid metal infiltration, spray deposition, and powder metallurgy methods. It describes the processing of continuous fiber-reinforced aluminum, discontinuously, reinforced titanium, and continuous fiber-reinforced titanium. The article concludes with information on work done to develop magnesium, copper, and superalloy MMCs.
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