Effect of copper content on the mechanical and sliding wear properties of monotectoid-based zinc-aluminium-copper alloys

Savaşkan, Temel; Hekìmoğlu, Ali Paşa; Pürçek, G.

doi:10.1016/s0301-679x(03)00113-0

Cited by 120 publications

(78 citation statements)

References 20 publications

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“…Furthermore, this phase transformation is associated with the strengthening of both Al-rich and Zn-rich alloys [4][5][6] . The spinodal decomposition is also normally related to the presence of a miscibility gap which is present in both Al-Zn and Al-Zn-Cu alloys.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Spinodal Decomposition in Al-Zn and Al-Zn-Cu Alloys Using the Nonlinear Cahn-Hilliard Equation

et al. 2017

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The phase field model based on the nonlinear Cahn-Hilliard equation was applied to analyze the spinodal decomposition process in Al-Zn and Al-Zn-Cu alloys. Partial differential equations were solved using the explicit finite difference method for the Al-20, and 35 at. % Zn alloys aged at temperatures between 25 and 100 °C for times from 10 s to 2000 s and Al-20at.%Zn-10at.%Cu and Al-20at.%Zn-5at.%Cu alloys at temperatures between 400 and 500 °C for times from 3600 to 360000 s. ThermoCalc indicated that the copper addition extends the presence of the metastable miscibility gap up to a temperature of about 597 °C in comparison to the temperature of 350 °C for the binary case. This miscibility gap was calculated assuming that the equilibrium phases were not present and thus it is only existing at the early stages of aging. Simulation results pointed out that the phase decomposition process is much faster in the binary alloys than that in the ternary alloys in spite of the higher aging temperature for the latter case.

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Section: Introductionmentioning

confidence: 99%

Analysis of Spinodal Decomposition in Al-Zn and Al-Zn-Cu Alloys Using the Nonlinear Cahn-Hilliard Equation

et al. 2017

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“…• C. According to [7,9] studies, the presence of precipitates in copper -rich structure increases the tendency of the alloy cracking, as these precipitates are harder and more brittle than the matrix. This process is accompanied by a decrease in elongation with the increase of copper content due to the formation of hard, brittle and rich in copper intermetallic precipitates along the grain boundaries.…”

Section: Analysis Of Resultsmentioning

confidence: 99%

“…This phase is formed in alloys containing at least 1% mass of Cu. The number and size ε phase precipitates increases with increasing of copper content in the alloy [6][7]. In the interdendritic spaces, α +η eutectoid mixture is present, where the η phase is a solid solution rich in Zn.…”

Section: Introductionmentioning

confidence: 99%

Study On Nanohardness Of Phases Occurring In ZnAl22Cu3 And ZnAl40Cu3 Alloys

Michalik¹,

Chmiela²

2015

Archives of Metallurgy and Materials

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Zn-Al alloys are mainly used due to their high tribological and damping properties. A very important issue is determination of the hardness of the phases present in the Zn-Al-Cu alloys. Unfortunately, in literature there is lack of studies on the hardness of the phases present in the alloys Zn-Al-Cu. The aim of this research was to determine the hardness of the phases present in the ZnAl22Cu3Si and ZnAl40Cu3Si alloys. The scope of the research included examination of the structure, chemical composition of selected micro-regions and hardness of phases present in the examined alloys. The research carried out has shown, that CuZn 4 phase is characterized by a similar hardness as the hardness of the interdendritic areas. The phases present in the structure of ZnAl40Cu3 and ZnAl22Cu3 alloys after soaking at the temperature of 185 O C are characterized by lower hardness than the phase present in the structure of the as-cast alloys.Keywords: ZnAl22Cu3 alloy, ZnAl40Cu3 alloy, nanohardness, structure Stopy Zn-Al stosowane są przede wszystkim z uwagi na swoje wysokie właściwości tribologiczne i tłumiące. Bardzo ważnym zagadnieniem jest określenie twardości faz występujących w stopach Zn-Al-Cu. W literaturze brak jednak opracowań dotyczących twardości faz występujących w stopach Zn-Al-Cu. Celem przeprowadzonych badań było określenie twardości faz występujących w stopach ZnAl22Cu3Si oraz ZnAl40Cu3Si. Zakres badań obejmował badania struktury, składu chemicznego w wybranych mikroobszarach oraz badania twardości faz występujących w badanych stopach. Przeprowadzone badania wykazały, że faza CuZn 4 charakteryzuje się zbliżoną twardością do twardości obszarów międzydendrytycznych. Fazy obecne w strukturze stopów ZnAl22Cu3 oraz ZnAl40Cu3 po wygrzewaniu w temperaturze 185• C charakteryzują się mniejszą twardością niż fazy obecne w strukturze stopów w stanie po odlaniu.

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“…Copper is another major alloying element used to improve the mechanical properties of Al-Zn alloys. When the Cu content of the ZnAl40Cu alloys ex- ceeds 2%, their tensile strength and wear resistance decrease due to formation of relatively hard and brittle ɛ (CuZn4) phase [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Copper forms a solid solution with zinc from which the dendrites are built. Copper is, however, also present in minimal quantities in the eutectoid mixture [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Influence of heat treatment on the wear resistance of the ZnAl40Cu1.5Ti1.5 alloy

Michalik

Iwaniak

Wieczorek

2017

Archives of Metallurgy and Materials

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INFLUENCE OF HEAT TREATMENT ON THE WEAR RESISTANCE OF THE ZnAl40Cu1.5Ti1.5 ALLOYZn-Al-Cu alloys are predominantly used due to their tribological properties. One of the crucial issues related to the use of Zn-Al alloys is their dimensional instability. Partial replacement of copper with titanium greatly contributes to the reduction of the dimensional instability issue. The study involved the ZnAl40Cu1.5Ti1.5 alloy. In this work, microstructure and wear properties of ZnAl40Cu1.5Ti1.5 alloy were studied in both as-cast and heat treated conditions. The heat treatment was performed by solution treatment at a temperature of 385°C for 24 hours, quenching in cold water and artificial aging at 125°C for 3 hours. The hardness tests enabled to specify the optimum ageing time span, which amounts to 3 hours. Wear tests indicated that the ZnAl40Cu1.5Ti1.5 alloy is characterized with high wear resistance. It was also observed that the applied heat treatment increases the wear resistance of the experimental alloy.

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Effect of copper content on the mechanical and sliding wear properties of monotectoid-based zinc-aluminium-copper alloys

Cited by 120 publications

References 20 publications

Analysis of Spinodal Decomposition in Al-Zn and Al-Zn-Cu Alloys Using the Nonlinear Cahn-Hilliard Equation

Analysis of Spinodal Decomposition in Al-Zn and Al-Zn-Cu Alloys Using the Nonlinear Cahn-Hilliard Equation

Study On Nanohardness Of Phases Occurring In ZnAl22Cu3 And ZnAl40Cu3 Alloys

Influence of heat treatment on the wear resistance of the ZnAl40Cu1.5Ti1.5 alloy

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