Results 111 to 120 of about 232 (146)
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Metalographic study of burning of silumin
Metal Science and Heat Treatment, 19841. Burning of Al−Si-alloys which develops as coalescence of silicon is due to development of silicon and hydrogen atom diffusion, i.e., permanent impurities in aluminum alloys. The rate of the process is governed by hydrogen content. 2. The more hydrogen Silumin contains the less is the effect of external influences (temperature, soaking
V. K. Afanas'ev, S. A. Stroganova
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Solidification mechanism of modified silumins
Metal Science and Heat Treatment, 19741. The finely dispersed structure of unmodified Silumin alloys formed during rapid cooling is a degenerate eutectic due to the independent nucleation and growth of phases resulting from the suppression of diffusion processes with large supercooling. 2. Additions of surface-active elements to Silumin alloys suppress the nucleation centers
P. A. Parkhutik +2 more
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Laser surface alloying of silumin
Metal Science and Heat Treatment, 1995Laser alloying is an effective way to increase the surface hardness and wear resistance of materials, including aluminum. The effect of laser alloying on the structure and hardness of silumin AL30, which is used to produce engine pistons operating at high temperatures, is an interesting subject for study.
Yu. B. Kisina +2 more
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Characteristic features of silumin alloys crystallization
Materials & Design, 1997Abstract The results differential thermal analysis (DTA) of crystallization of multicomponent silumin alloys with 8÷22 wt %Si and Mg, Cu, Ni and Fe minor admixtures are presented in the paper. It has been proved that to any one of the solid phases crystallizing from liquid (α, β, Mg 2 Si, Al 6 Cu 3 Ni, Al 2 Cu, Al g Fe 2 Si) a particular thermal ...
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Laser alloying of the surface of parts of silumins
Metal Science and Heat Treatment, 19911. The hardness and thermal stability of eutectic and hypereutectic silumins increase in laser remelting. 2. The proposed method of application of alloying powder makes it possible to increase the uniformity of distribution of the alloying elements in the zone of laser fusion. 3.
A. N. Grechin +3 more
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Modification of Silumin Using the Electroexplosive Method
Materials Science Forum, 2017Surface modification of silumin of the grade AK12 with plasma formed during an electrical explosion of aluminum foil with a sample of yttrium oxide powder placed in the explosion region (the electroexplosive doping method) is carried out. The thermodynamic analysis of the system Al-Si-Y-O is carried out.
Anatolii A. Klopotov +4 more
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Effect of doping on aging processes in silumin
Metal Science and Heat Treatment, 1987An attempt was made to establish the elements that are able to affect the kinetics of the origin and growth of products of decomposition in aluminum-silicon alloys (silumins) alloyed with copper that in composition are close to eutectic. Values for the solubility of 32 elements in aluminum and copper at 500/degree/C were determined.
S. A. Savichev +3 more
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Modification of hypereutectic silumins with phosphorus and sodium
Metal Science and Heat Treatment, 19771. The nucleation theory of the refining of primary silicon crystals in hypereutectic Silumins microalloyed with phosphorus was verified by experiments. Particles were observed in silicon crystals (possible AIP) which served as additional centers of nucleation of primary silicon crystals. 2. Combined modification of high-silicon Silumins
P. A. Parkhutik +2 more
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Centrifugal casting of a reinforced hypereutectic silumin
Russian Metallurgy (Metally), 2015Centrifugal casting is used to form composite materials with a gradient structure. Hardening particles are shown to affect the hardness of the composite materials.
A. V. Trapeznikov, E. S. Goncharenko
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2019
Käesoleva bakalaureusetöö eesmärgiks oli luua praktikumimaterjalid silumise kohta Tartu Ülikooli kursuse “Tarkvara testimine” (MTAT.03.159) jaoks. Töös kirjeldatakse peamisi põhjuseid silumise praktikumi loomiseks ning töö käigus loodud praktikumimaterjale ja ülesandeid. Loodud materjale rakendati 2018.a. kevadsemestril.
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Käesoleva bakalaureusetöö eesmärgiks oli luua praktikumimaterjalid silumise kohta Tartu Ülikooli kursuse “Tarkvara testimine” (MTAT.03.159) jaoks. Töös kirjeldatakse peamisi põhjuseid silumise praktikumi loomiseks ning töö käigus loodud praktikumimaterjale ja ülesandeid. Loodud materjale rakendati 2018.a. kevadsemestril.
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