The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform

V. V. Zakharov - One of the best experts on this subject based on the ideXlab platform.

  • Alloying Aluminum Alloys with Scandium
    Metal Science and Heat Treatment, 2017
    Co-Authors: V. V. Zakharov, I. A. Fisenko
    Abstract:

    Methods and procedures are discussed for more economic and effective use of scandium for alloying Aluminum Alloys. Specifically, it is recommended to introduce scandium and zirconium into Aluminum Alloys in a 1 : 1 ratio instead of the usual 3 : 1 with the same overall element content. It is also suggested that microalloying with scandium in an amount of 0.1% instead of 0.22% provides the required level of properties in many cases. The possibility of refining the structure of the Al – 2% Sc master alloy for increasing its adaptability (assimilation by the Aluminum melt) due to an increase in crystallization rate during ingot casting and other procedures is considered.

  • Effect of scandium on the structure and properties of Aluminum Alloys
    Metal Science and Heat Treatment, 2003
    Co-Authors: V. V. Zakharov
    Abstract:

    It is shown that the addition of scandium considerably influences the structure and properties of Aluminum and its Alloys. Scandium is the strongest inoculant of the cast grain structure of Aluminum Alloys, the strongest suppressor of recrystallization, and the strongest hardener (per 0.1% of the additive). The addition of zirconium intensifies and stabilizes the action of scandium. Commercial Aluminum Alloys alloyed with scandium and zirconium and a technology for fabricating deformed semiproducts from them are presented. The combination of operating properties of scandium-bearing Aluminum Alloys is substantially superior to that of traditional Aluminum Alloys.

  • Alloying Aluminum Alloys with scandium and zirconium additives
    Metal Science and Heat Treatment, 1996
    Co-Authors: V. G. Davydov, V. I. Elagin, V. V. Zakharov, D. Rostoval
    Abstract:

    In recent years Russian specialists have developed industrial weldable Aluminum Alloys alloyed with a small amount of scandium. Scandium added to existing weldable Aluminum Alloys improves considerably the set of their operational properties. In addition, the presence of scandium makes it possible to create new materials superior to traditional Aluminum Alloys. The present paper is devoted to problems of simultaneous alloying of Aluminum Alloys with scandium and zirconium.

  • Scandium-alloyed Aluminum Alloys
    Metal Science and Heat Treatment, 1992
    Co-Authors: V. I. Elagin, V. V. Zakharov, T. D. Rostova
    Abstract:

    The basic principles of alloying of Aluminum Alloys with scandium are: it is desirable to add scandium to Aluminum Alloys in a quantity from 0.1 to 0.3% together with zirconium (0.05–0.15%), which strengthens the positive influence of scandium on the structure and properties of Alloys;

David Weiss - One of the best experts on this subject based on the ideXlab platform.

  • Improved High-Temperature Aluminum Alloys Containing Cerium
    Journal of Materials Engineering and Performance, 2019
    Co-Authors: David Weiss
    Abstract:

    A common rare earth (cerium) when added to Aluminum in compositions up to the eutectic compositions of around 10 wt.% improves the high-temperature performance of Aluminum Alloys. In the early 1980s, some promising research and development efforts focused on powder metallurgy revealed that Aluminum Alloys containing 4 wt.% cerium exhibit high-temperature mechanical properties exceeding those of the best commercial Aluminum casting Alloys then in production. Those compositions, which also included high levels of iron, were difficult to process. Recently, magnesium replaces iron to reduce density and improve processing. Cerium oxide is an abundant rare earth oxide that is often discarded during the refining of more valuable rare earths such as Nd and Dy. Therefore, the economics are compelling for cerium as an alloy additive. In this review, we report results obtained during an investigation of the processing and properties of Aluminum-cerium Alloys produced via casting, extrusion and additive manufacturing. The results show mechanical properties are retained at higher temperatures than other Aluminum Alloys and show complete recovery of mechanical properties at room temperature when exposed to elevated temperatures as high as 500 °C for 1000 h. Alloys containing cerium also have superior corrosion properties when compared to most Aluminum Alloys.

V. I. Elagin - One of the best experts on this subject based on the ideXlab platform.

  • Ways of developing high-strength and high-temperature structural Aluminum Alloys in the 21st century
    Metal Science and Heat Treatment, 2007
    Co-Authors: V. I. Elagin
    Abstract:

    An analysis of the development of Aluminum Alloys in the 20th century is made on the basis of the author’s works in almost 40 years. It is inferred that advances in high-strength and high-temperature Aluminum Alloys will occur in the 21st century primarily by introducing transition and rare-earth metals into their composition.

  • Alloying Aluminum Alloys with scandium and zirconium additives
    Metal Science and Heat Treatment, 1996
    Co-Authors: V. G. Davydov, V. I. Elagin, V. V. Zakharov, D. Rostoval
    Abstract:

    In recent years Russian specialists have developed industrial weldable Aluminum Alloys alloyed with a small amount of scandium. Scandium added to existing weldable Aluminum Alloys improves considerably the set of their operational properties. In addition, the presence of scandium makes it possible to create new materials superior to traditional Aluminum Alloys. The present paper is devoted to problems of simultaneous alloying of Aluminum Alloys with scandium and zirconium.

  • Scandium-alloyed Aluminum Alloys
    Metal Science and Heat Treatment, 1992
    Co-Authors: V. I. Elagin, V. V. Zakharov, T. D. Rostova
    Abstract:

    The basic principles of alloying of Aluminum Alloys with scandium are: it is desirable to add scandium to Aluminum Alloys in a quantity from 0.1 to 0.3% together with zirconium (0.05–0.15%), which strengthens the positive influence of scandium on the structure and properties of Alloys;

René-yves Fillit - One of the best experts on this subject based on the ideXlab platform.

  • Surface characterization of Aluminum Alloys after diamond turning
    Journal of Materials Processing Technology, 2006
    Co-Authors: Philippe Revel, Hatem Khanfir, René-yves Fillit
    Abstract:

    Surface state resulting from manufacturing processes has a significant impact on product performance. Frequently, strict conditions are imposed on some dimensions and surface quality of manufactured products. High precision machining allows industry to dispense with successive operations such as turning, grinding and polishing to attain these objectives. In this paper a short review of this technique followed by an experimental study of pure Aluminum and Aluminum Alloys in terms of roughness and structural surface evolution is proposed. Both metals and Alloys were machined in single point diamond turning. Moreover, a complementary study on optimization of turning parameters for different Aluminum Alloys was also undertaken. Surface characterizations were carried out using two powerful techniques: interferometry microscopy and grazing incidence X-ray diffraction. These non-destructive methods allow to determine the evolution of mechanical and physical properties of materials, before and after turning. The role of alloy precipitates is shown as essential and the crystallographic texture of surface evolves.

M Chakraborty - One of the best experts on this subject based on the ideXlab platform.

  • fluidity of Aluminum Alloys and composites a review
    Journal of Alloys and Compounds, 2008
    Co-Authors: K R Ravi, K R Amaranathan, R M Pillai, M Chakraborty
    Abstract:

    Thin wall casting of Aluminum Alloys and their composites provide new opportunities for aerospace and automotive industries in producing light weight structures with good mechanical properties. These opportunities can be realized only when the foundries are confident in their ability to produce thinner-wall castings. The primary issue that must be addressed in producing thin wall castings is fluidity. The fluidity of Aluminum Alloys and composites has a direct influence not only on material castability, but also on the casting properties. Fluidity is a complex parameter that is affected by the properties of the molten metal and mold, pouring conditions, reinforcement characteristics and solidification mechanism. This paper brings out the current understanding about the various factors influencing the fluidity of Aluminum Alloys and composites. Further, theoretical model available in the literature to predict the fluidity of Aluminum Alloys and their composites is given and its significance has been discussed.