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aluminum-silicon hypoeutectic casting alloys

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Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006580
EISBN: 978-1-62708-210-5
... Abstract The 443 series of aluminum casting alloys have nominal silicon content of 5 wt% with various limits on iron, copper, manganese and magnesium. They are hypoeutectic AI-Si binary alloys with high ductility, very good corrosion resistance, good machinability, but only fair castability...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005301
EISBN: 978-1-62708-187-0
... Abstract This article focuses on aspects important for the commercial production of castings. It discusses the modification process in hypoeutectic and eutectic alloys that differ only in the relative volume fraction of primary aluminum and aluminum-silicon eutectic. The article explains how...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003175
EISBN: 978-1-62708-199-3
... also be modified by rapid cooling rates, foundries that pour thin-section castings (that solidify rapidly) often do not add modifiers to their melts. When using modifiers, the phosphorus content of the melt must be kept below 5 ppm in hypoeutectic alloys. In hypereutectic aluminum-silicon alloys...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003727
EISBN: 978-1-62708-177-1
... Fig. 20 Adsorption of impurity atoms on growth steps of a silicon crystal causing twinning. Source: Ref 12 Fig. 21 Modified as-cast microstructures of aluminum alloys. (a) Al-10Si, strontium-modified eutectic. Source: Ref 13 . (b) Alloy A356.0, strontium-modified eutectic. Source: Ref...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005212
EISBN: 978-1-62708-187-0
... and shows no primary aluminum; on the other hand, Fig. 2 depicts the microstructure of the same alloy cooled at a significantly faster rate and shows primary aluminum dendrites and finer silicon particles. Fig. 2 Al-12.5wt%Si alloy (a) slowly cooled and (b) chill cast. Source: Ref 11...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003769
EISBN: 978-1-62708-177-1
... York , 1989 32. Warmuzek M. , Aluminum-Silicon Casting Alloys: Atlas of Microfractographs , ASM International , 2004 33. Crepeau P.N. and Antolovich S.D. , Structure Property Relationships in Aluminum Alloy 339-T5: Tensile Behavior at Room and Elevated Temperature...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006388
EISBN: 978-1-62708-192-4
... Abstract This article begins by describing the designations of cast and wrought aluminum alloys. It explains the effects of main alloying elements in aluminum alloys: boron, chromium, copper, iron, lithium, magnesium, manganese, nickel, phosphorus, silicon, sodium, strontium, titanium...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003085
EISBN: 978-1-62708-199-3
... of silicon (dark) in a matrix of aluminum. 200×. (c) Al-33Cu alloy showing a lamellar structure consisting of dark platelets of CuAl 2 and light platelets of aluminum solid solution. 180×. (d) Mg-37Sn alloy showing a lamellar structure consisting of Mg 2 Sn “Chinese-script” (dark) in a matrix of magnesium...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006551
EISBN: 978-1-62708-210-5
... microstructure is accomplished in one of two ways, depending on whether the alloy is a hypoeutectic or eutectic aluminum-silicon alloy casting (alloys with 12% Si or less) or a hypereutectic alloy. Controlling the size and morphology of the eutectic silicon in hypoeutectic or eutectic aluminum-silicon alloy...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005331
EISBN: 978-1-62708-187-0
... instrumented sample. Hypoeutectic aluminum-silicon alloys can be improved by inducing structural modification of the normally occurring eutectic. In general, the greatest benefits are achieved in alloys containing from 5% Si to the eutectic concentration; this range includes most common gravity-cast...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003109
EISBN: 978-1-62708-199-3
... to be used are a function of the method of liquid treatment (level of minor elements), base and sulfur, and section thickness. Alloying elements, such as copper, tin, molybdenum, and even aluminum, can be used to change the as-cast matrix of CG iron from ferrite to pearlite. Typical ranges are 0.48...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006304
EISBN: 978-1-62708-179-5
... of white iron begins at lower temperature than that of gray iron. There is some evidence that silicon dioxide and aluminum oxide can serve as substrates for the growth of the Fe-Fe 3 C eutectic, and that the nature of the substrate can influence the morphology of the eutectic ( Ref 50 ). A large number...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001077
EISBN: 978-1-62708-162-7
... recently, all zinc alloys were based on a hypoeutectic composition, that is, they contained less aluminum (close to 4.0% Al) than the eutectic chemistry of 5.0% Al. Recently, a family of hypereutectic zinc-aluminum alloys with higher aluminum contents (>5.0% Al), have become widely used as die casting...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003772
EISBN: 978-1-62708-177-1
... bronze, 10% 82.2 Cu, 10 Al, 3 Fe, 4.8 Ni C64700 Silicon-nickel bronze Bal Cu, 1.9 Ni, 0.6 Si C67500 Manganese bronze A 58.5 Cu, 1 Sn, 38.7 Zn, 1.5 Fe, 0.3 Mn C68700 Arsenical aluminum brass 77.5 Cu, 20.3 Zn, 2.2 Al, (0.04 As) Wrought copper-nickel alloys and nickel silvers C70600...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005903
EISBN: 978-1-62708-167-2
... nucleation and thus have a grain-refining effect in most copper materials. Copper alloys are manufactured in a broad range of wrought and cast alloys. The main alloying elements are zinc, tin, lead, aluminum, nickel, manganese, silicon, and chromium. The following names and compositions are commonly used...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005247
EISBN: 978-1-62708-187-0
... with >12% Si) is based on maximizing the number of nucleation sites, augmented with rapid solidification cooling rates. This nucleation phenomenon is commonly termed refinement. Controlling the size and morphology of the eutectic silicon in hypoeutectic or eutectic aluminum-silicon alloy castings...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001061
EISBN: 978-1-62708-162-7
... fluidity, reducing cracking, and improving feeding to minimize shrinkage porosity. Fig. 1 Aluminum-silicon phase diagram and cast microstructures of pure components and of alloys of various compositions. Alloys with less than 12% Si are referred to as hypoeutectic, those with close to 12% Si...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003144
EISBN: 978-1-62708-199-3
... thickness; it can be much higher with some reactive grades of steel containing even small amounts of silicon (silicon-killed steels). Proprietary galvanizing processes that use small additions of aluminum (Polygalva) or nickel (Technigalva) in concentrations of 0.04 and 0.08 wt%, respectively, have been...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005215
EISBN: 978-1-62708-187-0
... of copper when compared at the same temperatures. Silicon is an important component of most aluminum-base casting alloys, such as Al-356, because it improves castability by increasing fluidity and resistance to hot tearing and decreasing the tendency for shrinkage microporosity. In commercial casting alloys...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005190
EISBN: 978-1-62708-187-0
... of Charged Aluminum on Iron Temperature, Silicon Recovery and Desulfurization in an Iron-Producing Cupola , Trans. AFS , Vol 92 , 1984 , p 161 – 172 9. Landefeld C.F. and Katz S. , Kinetics of Iron Desulfurization by CaO-CaF 2 , Proceedings of the Fifth International Iron and Steel...