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rapid solidification process tooling

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410029
EISBN: 978-1-62708-280-8
... covered also include gravity permanent molding, low-pressure permanent molding, counter pressure, squeeze casting, investment casting, rapid prototype casting, cast forge hybrid, and semisolid metal processes. green sand casting no-bake molding vacuum molding evaporative foam casting gravity...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.9781627082808
EISBN: 978-1-62708-280-8
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140021
EISBN: 978-1-62708-335-5
... valves, electrical connectors, and various covers and housings that require pressure tightness. An acronym for accurate, rapid, and dense, the Acurad process claimed a degree of directional solidification from thermal analysis, die cooling and gating design, modulated lower metal injection velocities...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280079
EISBN: 978-1-62708-267-9
..., introduction of molten metal (pouring), and metal solidification sequences of the casting process. The vast computer power now available enables improved and rapid modeling of a given article and casting process. Results are encouraging, but it should be noted that, while the modeling concepts (algorithms...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740047
EISBN: 978-1-62708-308-9
... trunk) spacing, λ 1 , and the secondary (dendrite arm) spacing, λ 2 . Source: Ref 2 Fig. 7 Three structural zones forming in a casting. (a) Early in the solidification process, solid nuclei appear at, or close to, the mold wall. For a short time, they increase in size and form the outer...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310331
EISBN: 978-1-62708-326-3
... austenite in the surface layers. A matrix microstructure of fine pearlite, readily obtained by normalizing, has a rapid response to surface hardening and provides excellent core support for the hardened case. Because of the short heating cycle in these processes, the pearlitic types of ductile iron—ASTM...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140047
EISBN: 978-1-62708-335-5
... phases during solidification. The process of hydrogen precipitation consists of: Diffusion of hydrogen atoms within the molten pool Formation of subcritical nuclei as a function of time and cooling Random emergence of stable precipitates that exceed the critical size required...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870537
EISBN: 978-1-62708-314-0
... a high-density preform that can be subsequently forged to form a fully dense product. The production of MMCs by spray deposition can be accomplished by introducing particulates into the metal spray, leading to codeposition with the atomized metal onto the substrate. The process is a rapid solidification...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410021
EISBN: 978-1-62708-280-8
... was 800 μm on the surface and 500 μm in the center. The typical pore fraction was 3 to 4%. In this case, the sand casting process may not be most ideal process because of the potential for rapid crack propagation across the coarse structure, compounded by the large pore size and high pore fraction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060085
EISBN: 978-1-62708-261-7
... Handbook , ASM International , 2004 10.31399/asm.hb.v09.a0003763 5.2 Flemings M.C. , Solidification Processing , McGraw-Hill, Inc. , 1974 10.1007/BF02643923 5.3 Casting , Vol 15 , ASM Handbook , ASM International , 2008 10.31399/asm.hb.v15.9781627081870 5.4 Kaufman...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480161
EISBN: 978-1-62708-318-8
... parts Production Spraying Solid or potentially liquid Research base Near-net shapes Prealloyed and blended elemental Commercial Far-from-equilibrium processes Rapid solidification, mechanical alloying, and vapor deposition Research base Thermohydrogen processing Use of hydrogen...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410551
EISBN: 978-1-62708-265-5
... , p 175 – 221 22.54 White C.W. and Aziz M.J. , Energy Deposition, Heat Flow and Rapid Solidification during Pulsed-Laser and Electron Beam Irradiation of Materials , Surface Alloying by Ion, Electron and Laser Beams , Rehn L.E. , Picraux S.T. , and Wiedersich H...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410163
EISBN: 978-1-62708-265-5
... Inclusions and chemical segregation are factors in many process-induced failures involving steel parts. Inclusions are nonmetallic compounds introduced during production; segregation is a type of chemical partitioning that occurs during solidification. This chapter discusses the origins...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980141
EISBN: 978-1-62708-342-3
... composition. The majority of commercial wrought materials cast by the continuous casting process exhibit a cellular to dendritic type of solidification [ Fle 74 ]. This, in turn, determines the cast grain structure. Figure 4.22 shows an example of a cellular/dendritic solidified cast structure. Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410215
EISBN: 978-1-62708-280-8
... of solidification and the ability of directional feeding to achieve the targeted goal. It helps substantially to design the cooling channels and local chills, reducing the process development time and eliminating costly tooling modifications. There are several software packages for solidification and flow...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850001
EISBN: 978-1-62708-260-0
... Coarse grain, gray Malleable iron Fine grain, black Wrought iron Fibrous, light gray Low-carbon steel Fine grain, light gray Tool steel Very fine grain (silky), light gray Prior to the development of rapid chemical analysis procedures, the steel melter followed the progress...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140165
EISBN: 978-1-62708-264-8
... steels to break up the network carbides and achieve adequate toughness for practical uses. By employing rapid solidification, one can reduce the size of the primary carbides and refine the networks. This is the reason tool steels are sometimes made from powders. Whereas there is no way to rapidly...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... of storing different x-ray exposure parameters for rapid retrieval and automatic warm-up of the system prior to use. The advent of digital image processing systems and microfocus x-ray sources (near point source) producing energies capable of penetrating thick material sections have made real-time inspection...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610585
EISBN: 978-1-62708-303-4
... to be experienced with welding processes that promote rapid solidification and cooling. The use of preheating and controlled heating and cooldown rates help to prevent hot cracking. The approach used to minimize the mechanical factor is to reduce the overall weld restraint through joint design and appropriate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240095
EISBN: 978-1-62708-251-8
...Abstract Abstract Almost all metals and alloys are produced from liquids by solidification. For both castings and wrought products, the solidification process has a major influence on both the microstructure and mechanical properties of the final product. This chapter discusses the three zones...