Perspective high strength aluminium alloys of new generation based on Al–Ni–Mn–Fe–Si–Zr system

Amenova, Aliya; Белов, Н. А.; Smagulov, Dauletkhan; Toleuova, Ainagul

doi:10.1179/1432891713z.000000000350

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…In an effort to improve strength, Sc was used in [115,116] [117]. The presence of Si widened the crystallization range, increasing the tendency of the alloy to form hot cracks during casting but having high thermal stability.…”

Section: Eutectic Based On Al−ni Systemmentioning

confidence: 99%

“…The strengthening contributions of the Al 3 Ni and Al 3 Sc phases at ambient temperature are cumulative in the ternary alloys. The hardness curve of Al−6Ni−0.4Sc (wt.%) at 300 °C was described via a superposition of the curves of Al−0.4Sc and Al−6Ni alloys, over the full aging time of 0–672 h. In another research, a new generation of heat-resistant aluminum alloys, based on Ni-containing eutectic, the Al–Ni–Mn–Fe–Si–Zr system, strengthened by the Al 3 Zr (L1 2 ) nanoparticles, was developed [ 117 ]. The presence of Si widened the crystallization range, increasing the tendency of the alloy to form hot cracks during casting but having high thermal stability.…”

Section: Efforts To Increase the Upper Service Limit Of High-tempementioning

confidence: 99%

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Thermal Stability of Aluminum Alloys

Czerwiński

2020

Materials

118

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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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Section: Eutectic Based On Al−ni Systemmentioning

confidence: 99%

Section: Efforts To Increase the Upper Service Limit Of High-tempementioning

confidence: 99%

Thermal Stability of Aluminum Alloys

Czerwiński

2020

Materials

118

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“…Another solution is based on the development of new complex-alloyed compositions of systems such as Al-Cu-Mn-Fe-Ni, Al-Ni-Mn-Fe-Zr, Al-Ni-Mn-Fe-Si-Zr, and some others [6,7,24,25]. This type of alloy is characterized by a large number of stable primary phases with fine structure, which are able to provide a high level of mechanical properties Нові литі матеріали at room and elevated temperatures up to 250-350 0 C. However, to achieve the optimal structural-phase composition, such alloys require specific methods of crystallization by spraying, semi-solid pressing, extrusion, and subsequent molding of finished products at later stages of production.…”

Section: Introductionmentioning

confidence: 99%

Principles of Creep-Resistant Aluminum Alloys Development

Narivskyi¹,

Voron²,

Pruss³

et al. 2021

Processy litʹâ

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The work is devoted to monitoring and studying the principles of obtaining creep-resistant Al-based alloys. It is shown that aluminum alloys are constantly expanding their application fields. At the same time, the requirements for a number of aluminum alloys are also growing, which determines their wider use in extreme conditions and, in particular, at elevated temperatures. Examples of parts and details, made of such materials, are used in car engines and special equipment, turbine impellers, parts of heat exchangers and collectors, fittings, cladding elements, and casing parts for aviation and space purposes, etc. Development and production of new creep-resistant materials on the basis of aluminum with the increased level of operational characteristics demands detailed studying of mechanisms and ways maintenance of their optimum structural-phase conditions and finding of effective ways to produce them. The presented work considers the existing methods and principles of efficient creep-resistant aluminum alloys production, among which the greatest attention is paid to the principles of production of cast alloys, as the most profitable in terms of mass production and economic efficiency. It was shown that the main principles of achieving this goal include: the use of alloying elements (Cr, Mn, Fe, Co, Ni, Cu) and modifiers (Ti, Zr, Mo, Hf), which will promote the formation of stable insoluble phases with low diffusion activity and noticeable cubic or close to cubic morphology in a metal matrix of the alloy; Creation of eutectic alloys, including silicon-free compositions, which would consist a large proportion of high-temperature phases with favorable morphology; The temperature of the eutectic transformation should be as high as possible; Introduction of technological principles of melts casting and preparation, that are able to effectively grind the structure of the alloy and increase the solubility of insoluble components by creating specific thermodynamic conditions.

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“…Sterling silver usually are comprised of silver content at least 92.5wt% and copper as a vital alloying element [1]. These alloys can be strengthened by age-hardening in a manner of several other alloys [2]. The usual heat treatment for binary 925AgCu alloys consists of homogenization by heating at 750°C to dissolve copper completely in silver matrix followed by rapid quench in water to create super-saturated state, and aging at temperature below solvus line in order to obtain very fine Cu-rich precipitates [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of Beryllium and Tin on Spring Property of Aged Silver Alloys 935 without Solutionization Treatment

Chairerk

Imurai

Chairuangsri

et al. 2015

KEM

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Microstructural development and mechanical properties of as cast and heat treated 935 Ag-Cu and Ag-Cu-Be-Sn alloys without using solutionization were investigated. The conventional lost-wax process with vacuum assisted and induction heating has been performed for producing the as cast specimens. After pouring the melt into plaster mould, the casting has been prolonged for 15 minutes prior to quenching into water. Subsequently all specimens including the reference specimens, commercial specimens and Ag-Cu-Be-Sn additions specimens were aged at 250 and 350°C for a given period between 0 to 120 min according to normal aging procedure of the 935 AgCu alloy. In case of Be and Sn additions, the A1 alloy with aging at 350°C performed the combination of good mechanical properties and the surface finish with superior anti-tarnish and fire scale resistance and thus these are suitable for jewelry applications. Microstructures were characterized by using both scanning and transmission microscopes. The results show that the precipitates in the 935 AgCuBeSn alloy were detected and thus resulted in a better improvement in yield strength and modulus of resilience than those of the 935 AgCu alloy

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Perspective high strength aluminium alloys of new generation based on Al–Ni–Mn–Fe–Si–Zr system

Cited by 6 publications

References 3 publications

Thermal Stability of Aluminum Alloys

Thermal Stability of Aluminum Alloys

Principles of Creep-Resistant Aluminum Alloys Development

Effects of Beryllium and Tin on Spring Property of Aged Silver Alloys 935 without Solutionization Treatment

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