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high-silicon aluminum alloys

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Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003815
EISBN: 978-1-62708-183-2
... principal alloying elements on solution potential of high-purity aluminum are shown in Fig. 5 . For each element, the significant changes that occur do so within the range in which the element is completely in solid solution. Further addition of the same element, which forms a second phase, causes little...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001308
EISBN: 978-1-62708-170-2
... manganese, silicon, and copper, on the other hand, are colored when anodized. Alloy segregation can occur in high-magnesium alloys, and pitting will result unless special pretreatments are used. Table 2 lists several typical applications for abrasive blast cleaning of aluminum products, indicating the...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003121
EISBN: 978-1-62708-199-3
... (for example, the use of polycrystalline diamond tooling for machining hard (>100 HB) high-silicon-content casting alloys.) Hardness and yield strengths are variously used as approximations of machinability. Chemical milling, the removal of metal by chemical attack in an alkaline or acid...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003130
EISBN: 978-1-62708-199-3
... some of the 7 xx.x alloys and alloy 520.0-T4 in atmospheric exposures of stressed parts. Applications for these alloys must be carefully engineered to avoid such problems. Corrosion resistance of aluminum in high-purity water, distilled or deionized, and in steam condensate is so high that these...
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
... ideal scenario can be difficult to assure, many die casters require phosphorus in their hypereutectic alloy melts and claim that somewhat better primary silicon microstructures result. Fig. 5 Effect of solidification rate. (a) Unrefined high-pressure die casting chain saw crankcase, >150 °C/s...
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
... eutectic will exhibit a regular morphology. In this case, the microstructure is made up of either lamellae or fibers that have a high degree of regularity and periodicity. However, if one phase is faceted, the eutectic structure is often irregular. The typical aluminum-silicon eutectic is closer to a...
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
... growth of the silicon phase during chemical modification with sodium or strontium. This is evidenced by a 6 to 10 °C (11 to 18 °F) depression in the eutectic growth temperature, T G . The formation of silicon crystals in liquid aluminum-silicon melts is influenced by the high latent heat (and entropy...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006268
EISBN: 978-1-62708-169-6
... strengthening procedure for aluminum alloys. It is preceded by the solution heat treatment (SHT) and quenching steps, which produce an alloy rich in supersaturated solute atoms (ideally totally supersaturated) and a high density of nonequilibrium vacancies (ideally equal to the density at the SHT temperature...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006273
EISBN: 978-1-62708-169-6
... aluminum-silicon alloy despite the high primary silicon content ( Ref 37 ). For spray-formed aluminum alloys, a subsequent age-hardening treatment after plasma nitriding is adequate to obtain the stability range that is reached for conventional aluminum alloys modified by surface alloying and plasma...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003124
EISBN: 978-1-62708-199-3
.... Phases in commercial products may not be those predicted by the equilibrium phase diagrams because of the long times at high temperatures required to approach equilibrium. In large amounts, silicon improves castability and fluidity. Consequently, it is used in 4 xxx brazing sheet and in 3 xx.x and 4...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006287
EISBN: 978-1-62708-169-6
... Abstract This article describes the general categories and metallurgy of heat treatable aluminum alloys. It briefly reviews the key impurities and each of the principal alloying elements in aluminum alloys, namely, copper, magnesium, manganese, silicon, zinc, iron, lithium, titanium, boron...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005302
EISBN: 978-1-62708-187-0
... refinement in aluminum casting alloys. It reviews the use of boron and titanium as a grain refiner for aluminum casting alloys. The article discusses the best practices for grain refinement in various aluminum casting alloys. These include aluminum-silicon casting alloys, aluminum-silicon-copper casting...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006288
EISBN: 978-1-62708-169-6
... Abstract This article focuses on the aging characteristics of solution and precipitation heat treated aluminum alloy systems and their corresponding types. It includes information on aluminum-copper systems, aluminum-copper-magnesium systems, aluminum-magnesium-silicon systems, aluminum-zinc...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006272
EISBN: 978-1-62708-169-6
... quenched to ambient temperature. The precipitation (T6) treatment was 185 °C (365 °F) for 8 h. Aluminum alloy 6069-T6 is morequench sensitive, which is thought to be associated with the increased amounts of magnesium, silicon, manganese, and chromium that increase the nucleation rate and Mg 2 Si...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003996
EISBN: 978-1-62708-185-6
... aluminum alloys improves with increasing metal temperature. However, there is considerable variation in the effect of temperature for the alloys plotted. For example, the high-silicon alloy 4032 shows the greatest temperature effect, while the high-strength Al-Zn-Mg-Cu 7 xxx series alloys display the...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006285
EISBN: 978-1-62708-169-6
... silicon). This can only be accomplished by high-temperature solution annealing to achieve a nearly homogeneous matrix, followed by fast quenching to freeze in the SSS. The temperature should be above the solvus line of the elements, and the time should be sufficient to dissolve all of the second phases...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000620
EISBN: 978-1-62708-181-8
... sharp-edged silicon (light gray) in the microstructure of the aluminum alloy is evidence that heat treating to increase toughness and relieve residual stresses was not performed. 0.5% HF etch, 400× (R.W. Bohl, University of Illinois) Fractures in a die cast aluminum alloy 518.0 housing of a chain...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005191
EISBN: 978-1-62708-187-0
... at.%, the interaction coefficient method does not yield accurate values. With this factor in mind, thermodynamic data have been selected for the following alloy systems: aluminum-magnesium, aluminum-silicon, copper-aluminum, copper-nickel, copper-tin, and copper-zinc. Aluminum-magnesium...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006289
EISBN: 978-1-62708-169-6
... high electrical resistivity. Fig. 3 Changes in electrical conductivity with aging of as-quenched sheet of three major types of precipitation-hardening aluminum alloys. (a) Natural aging. (b) Artificial aging. Source: Ref 5 Although there are variations for different alloys and conditions...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006271
EISBN: 978-1-62708-169-6
... microstructural changes in undercooled aluminum alloys. It has been especially developed for low-alloyed aluminum alloys and may reach its limits for high-alloyed aluminum alloys, where precipitates formed during quenching may already contribute significantly to yield strength ( Ref 19 ). Alternatively, the...