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Silicide precipitation strengthened TiAl
Materials Science and Engineering: A, 1995Abstract Precipitation of a titanium silicide Ti5Si3 was found to be beneficial to improvement of the creep resistance of a fully lamellar Ti-48Al-1.5Cr cast alloy without the sacrifice of tensile properties. The addition of 0.26–0.65 mol% Si generates fine precipitates less than 200 nm in size during aging at 900 °C for 5 h.
T. Noda, M. Okabe, S. Isobe, M. Sayashi
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Maps of intragranular precipitation strengthening
Czechoslovak Journal of Physics, 1985Maps of strengthening by small (semi)coherent precipitates homogeneously dispersed in the grains have been constructed. They can show the most probable dislocation-particle interaction mechanism and the strengthening effect of a given dispersion of particles. As an application, the effect ofγ′-Ni3(Al, Ti) and M23C6 precipitation in austenitic steels is
A. Orlová, J. Čadek
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Strengthening and strain hardening mechanisms in a precipitation-hardened high-Mn lightweight steel
Acta Materialia, 2017 We report on the strengthening and strain hardening mechanisms in an aged high-Mn lightweight steel (Fe-30.4Mn-8Al-1.2C, wt.%) studied by electron channeling contrast imaging (ECCI), transmission electron microscopy (TEM), atom probe tomography (APT) and
Dirk Ponge +2 more
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Magnesium carbonate precipitate strengthened aerobic granules
Bioresource Technology, 2015Aerobic granules were precipitated internally with magnesium carbonate to enhance their structural stability under shear. The strengthened granules were tested in continuous-flow reactors for 220 days at organic loadings of 6-39 kg/m(3)/day, hydraulic retention times of 0.44-19 h, and temperatures of 10 or 28°C. The carbonate salt had markedly improved
Duu-Jong, Lee, Yu-You, Chen
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Precipitation Strengthened Spring Steel for Automotive Suspensions
SAE Technical Paper Series, 1982<div class="htmlview paragraph">The addition of a small amount of vanadium and columbium. into SAE 9260 was found to give the steel excellent sag resistance, caused by the precipitation strengthening of V and Cb. The precipitation strengthening enhances the yield strengths in tension and torsion obtained from the specimens with various tempered ...
Toshiro Yamamoto +3 more
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Precipitation strengthening of binary AlLi alloys by δ′ precipitates
Materials Science and Engineering: A, 1988Abstract The published data on the strengthening of binary AlLi alloys by δ′ precipitates are analyzed according to a recent version of the theory of order strengthening. The results are found to agree with the data provided that the antiphase boundary energy γapb on {111} is assigned a value in the range 0.140–0.160 J m−2.
J.C. Huang, A.J. Ardell
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Effect of Deformation on Precipitation-Strengthening
Metal Science, 1974AbstractThe effect of deformation after quenching but before ageing on the age-hardening of several aluminium alloys has been investigated. The changes in hardness, tensile properties, and microstructure during ageing have been recorded. It has been found that, in addition to the work-hardening effect, alloys exhibiting heterogeneous nucleation display
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Strengthening of Ferrite by Vanadium Carbide Precipitation
Metal Science Journal, 1973AbstractWhen iron–vanadium–carbon alloys are transformed from the γ to the α state, a banded dispersion of vanadium carbide is formed as the transformation fronts move through the crystals. The strengthening resulting from this reaction in a series of alloys isothermally transformed in the range 725–850° C is shown to be dependent on the transformation
A. D. Batte, R. W. K. Honeycombe
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DISPERSION-STRENGTHENED IRON BY GEL PRECIPITATION
Powder Metallurgy, 1973Metastable iron oxide particles containing calcium, magnesium, or zirconium in solid solution were produced by the gel precipitation method. These were reduced to metal with hydrogen/nitrogen mixtures in a fluidized-bed furnace at 800°C to yield iron powders containing dispersed oxide phases within each iron particle.
M. R. James, J. R. Moon
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Synergistic precipitation strengthening in TiAl alloys
Applied Physics Letters, 2006Precipitation of creep-life enhancing H carbides and ζ silicides occurring during α2 dissolution in fully lamellar (α2+γ)-TiAl (alloyed with carbon and silicon) were studied by transmission electron microscopy. The α2→(γ+precipitate) transformation reaction consisted of the following sequence: α2 dissolution by ledge mechanism, silicide precipitation ...
M. Karadge, Y.-W. Kim, P. I. Gouma
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