About Alloying of Aluminum Alloys with Transition Metals

Захаров, В. В.

doi:10.1007/s11041-017-0104-2

Cited by 29 publications

(6 citation statements)

References 2 publications

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“…The coarsening of silicon particles can be described by the LSW coarsening model. [41,42] (a) In the early stages of the solid solution, there are many vacancy defects in the matrix and the Cu element will quickly move into the matrix. From the EDS and XRD curves, when the solution time is 1 h, the concentration of Cu near the Si phase decreases rapidly and the diffraction peak intensity of the Al 2 Cu phase decreases significantly, which further increases the supersaturation of the solute.…”

Section: Si Phase Morphology Evolution and Phase Formationmentioning

confidence: 99%

Adjusting the Si Phase and Forming Nanoprecipitation to Improve the Mechanical Properties of Al–Si–Cu–Mg Alloy by Heat Treatment

Hao

Bian

et al. 2021

Adv Eng Mater

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To adjust the morphology of the Si phase and improve the mechanical properties of Al–Si–Cu–Mg alloy formed by semisolid squeeze casting, the effects of solution time on microstructure evolution and mechanical properties are systematically studied. Results show that spheroidization occurs in the Si phase, and the content of Cu in the matrix increases simultaneously after solution treatment at 525 °C for 1 h. As solution time increases to 8 h, the content of Cu in the matrix increases from 1.15% to 1.41% and the dislocation density decreases. After an aging treatment at 180 °C for 12 h, the β′, θ′, and Q′ phases precipitate. After heat treatment, the alloy strength value shows a “double peak” phenomenon. After a 1 h solution treatment, the tensile strength of the alloy reaches the first peak, which is mainly ascribed to the large dislocation density induced by the semisolid squeeze casting process. When the solution time is 8 h, the tensile strength of the alloy is 323 MPa and the tensile strength reaches the second peak, which is ascribed to the rounding of the Si phase and the strengthening effects of fine precipitates.

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Section: Si Phase Morphology Evolution and Phase Formationmentioning

confidence: 99%

Adjusting the Si Phase and Forming Nanoprecipitation to Improve the Mechanical Properties of Al–Si–Cu–Mg Alloy by Heat Treatment

Hao

Bian

et al. 2021

Adv Eng Mater

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“…Therefore, their tri-aluminides with the general chemical formula Al 3 TM, formed within the aluminum matrix during artificial aging, have high thermal stability. There are data suggesting benefits of using combinations of two or more transition metals, additions of which widen the aluminum solid solution range [103].…”

Section: Features Specific For Cast Alloysmentioning

confidence: 99%

Thermal Stability of Aluminum Alloys

Czerwiński

2020

Materials

117

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Thermal stability, determining the material ability of retaining its properties at required temperatures over extended service time, is becoming the next frontier for aluminum alloys. Its improvement would substantially expand their range of structural applications, especially in automotive and aerospace industries. This report explains the fundamentals of thermal stability; definitions, the properties involved; and the deterioration indicators during thermal/thermomechanical exposures, including an impact of accidental fire, and testing techniques. For individual classes of alloys, efforts aimed at identifying factors stabilizing their microstructure at service temperatures are described. Particular attention is paid to attempts of increasing the current upper service limit of high-temperature grades. In addition to alloying aluminum with a variety of elements to create the thermally stable microstructure, in particular, transition and rare-earth metals, parallel efforts are explored through applying novel routes of alloy processing, such as rapid solidification, powder metallurgy and additive manufacturing, engineering alloys in a liquid state prior to casting, and post-casting treatments. The goal is to overcome the present barriers and to develop novel aluminum alloys with superior properties that are stable across the temperature and time space, required by modern designs.

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“…Their initial melting point is higher than that of Ni-Al alloys [4]. The most effective way to control the structure of aluminum (nickel) alloys is to introduce small amounts of transition metals (TM) as additions to binary [5][6][7][8][9][10] and multicomponent [11][12][13][14][15][16][17][18][19] master alloys: Al-TM (Ti, Zr, Sc, Hf, etc.) and Al-Sc-Zr; Al-Zr-Ti; Al-Sc-Ti; etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Complex-Alloyed Nickel Aluminides from Oxide Compounds by Aluminothermic Method

Gostishchev

et al. 2018

Metals

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This paper deals with the investigation of complex-alloyed nickel aluminides obtained from oxide compounds by aluminothermic reduction. The aim of the work was to study and develop the physicochemical basis for obtaining complex-alloyed nickel aluminides and their application for enhancing the properties of coatings made by electrospark deposition (ESD) on steel castings, as well as their use as grain refiners for tin bronze. The peculiarities of microstructure formation of master alloys based on the Al-TM (transition metal) system were studied using optical, electronic scanning microscopy and X-ray spectral microanalysis. There were regularities found in the formation of structural components of aluminum alloys (

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About Alloying of Aluminum Alloys with Transition Metals

Cited by 29 publications

References 2 publications

Adjusting the Si Phase and Forming Nanoprecipitation to Improve the Mechanical Properties of Al–Si–Cu–Mg Alloy by Heat Treatment

Adjusting the Si Phase and Forming Nanoprecipitation to Improve the Mechanical Properties of Al–Si–Cu–Mg Alloy by Heat Treatment

Thermal Stability of Aluminum Alloys

Synthesis of Complex-Alloyed Nickel Aluminides from Oxide Compounds by Aluminothermic Method

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