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hypoeutectic alloys

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Published: 01 December 2004
Fig. 7 Networklike morphology of second-phase structure in two hypoeutectic alloys. (a) As-cast 356 alloy. (b) As-cast 7050 alloy. Both etched with 0.5% HF (5m in Table 4 ) and magnified by 100× More
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Published: 31 August 2017
Fig. 8 Hyper- and hypoeutectic alloys with similar liquidus temperature More
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Published: 01 December 2004
Fig. 11 Effect of heat treatment on phase morphology in a hypoeutectic alloy (alloy 355). (a) As-cast structure (at 500× magnification) with a continuous network of interdendritic precipitates of eutectic silicon. (b) Heat treated condition (T6) of same alloy with globular eutectic silicon More
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Published: 01 December 2004
Fig. 10 Examples of primary particle shape. (a) Sn-30Pb hypoeutectic alloy showing dendritic particles of tin-rich solid solution in a matrix of tin-lead eutectic. Original magnification 500×. (b) Al-19Si hypereutectic alloy, phosphorus-modified, showing idiomorphic particles of silicon More
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Published: 01 December 1998
Fig. 20 Examples of primary-particle shape. (a) Sn-30Pb hypoeutectic alloy showing dendritic particles of tin-rich solid solution in a matrix of tin-lead eutectic. 500×. (b) Al-19Si hypereutectic alloy, phosphorus-modified, showing idiomorphic particles of silicon in a matrix of aluminum More
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...
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Published: 01 December 2008
Fig. 8 Sequence of events during nucleation of the eutectic phases in aluminum-silicon hypoeutectic alloys. Source: Ref 27 More
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Published: 01 December 2004
Fig. 16 Effect of sodium modification on microstructure of sand-cast aluminum-silicon hypoeutectic alloy 356-F. Both specimens were etched in 0.5% hydrofluoric acid and are shown at 100×. (a) As-cast structure in unmodified alloy consists of a network of silicon particles (sharp gray), which More
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Published: 31 December 2017
Fig. 4 Solidification microstructure of a hypoeutectic Al-Si-Cu-Mg alloy with (a) fine and (b) coarse secondary dendrite arm spacing More
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 that are 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...
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
... when discussing the eutectic reaction as essentially an Al-Si-Fe ternary system with the eutectic phases being Al eut + Si eut + β-(Al,Si,Fe), rather than a binary aluminum-silicon system. In hypoeutectic alloys of this system, nucleation of the eutectic phases proceeds as illustrated schematically...
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Published: 01 December 2004
Fig. 52 Morphology of intermetallic phases examined by light microscopy (left) of etched specimens (0.5% HF) and by SEM imaging (right) of specimens deep etched with Flick's reagent. (a) β-AlFeSi phase particles in the interdendritic region of an unmodified hypoeutectic aluminum-silicon alloy More
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Published: 01 December 2004
Fig. 1 Typical microstructures of hypoeutectic, eutectic, and hypereutectic aluminum-silicon commercial alloys. (a) Hypoeutectic aluminum-silicon alloy (Al-5.7Si, alloy type A319). Fan-shaped Al 51 -(MnFe) 3 -Si 2 phase growing in competition with the α-aluminum phase, silicon crystals, Al 2 More
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Published: 01 January 1993
Fig. 8 Effect of dilution on the microstructure of a Fe-28Cr-4Mo-0.4Mn-4.6C hardfacing alloy. (a) First layer over mild steel showing a hypoeutectic structure of metal dendrites and interdendritic eutectic, 55 HRC. (b) Second layer showing a fine hypoeutectic structure with a large percentage More
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006334
EISBN: 978-1-62708-179-5
... on the phenomenon that the latent heat of the melt is released in the transition from liquid to a solid state, so that the indicated solidification temperature remains constant over a short time or even rises, depending on the solidification conditions. For example, when a hypoeutectic alloy starts to solidify...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006390
EISBN: 978-1-62708-192-4
..., chain saw guide bars, and wear pads in gas turbines. Alloy 6 PM R30106 bal 28.5 4.5 ≤1.5 1.0 ≤5 ≤3 ≤2 ≤2 ≤1 B (b) Alloy 6B R30016 bal 30 4.0 ≤1.5 1.0 ≤3 ≤2.5 0.7 1.4 … Alloy 6K … bal 30 4.5 ≤1.5 1.6 ≤3 ≤3 ≤2 ≤2 … Stellite 6 is hypoeutectic, i.e...
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Published: 01 January 1990
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 as eutectic, and those with over 12% Si as hypereutectic. More
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Published: 01 December 1998
Fig. 3 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 as eutectic, and those with over 12% Si as hypereutectic. More
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Published: 31 December 2017
Fig. 3 Examples of intermetallic particles (Q, θ, π, β) formed during solidification in hypoeutectic Al-Si-Cu alloys More
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Published: 31 December 2017
Fig. 1 Optical micrographs showing microstructures representative of (a) hypoeutectic, (b) eutectic, and (c) hypereutectic aluminum-silicon alloys. Adapted from Ref 12 More