The influence of impurity level and tin addition on the ageing heat treatment of the 356 class alloy

Kliauga, Andréa Madeira; Vieira, Estéfano Aparecido; Ferrante, M.

doi:10.1016/j.msea.2007.07.091

Cited by 32 publications

(14 citation statements)

References 33 publications

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“…Magnesium is an important element which forms a significant solid solution in Al-Si alloys and increases the strengths of alloys with precipitation hardening. A356 alloys constitute the most important group of Al-Si-Mg alloys whose strength can be increased with Mg 2 Si precipitates in Al matrix [2][3][4][5]. Another important method used to improve the mechanical properties of the alloy is to compose stable in situ intermetallic phases in the structure [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Wear Behaviour of A356/TiAl3 in Situ Composites Produced by Mechanical Alloying

Çam

Demir

Özyürek

2016

Metals

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Abstract:In this study, the effects of in situ TiAl 3 particles on dry sliding wear behavior of A356 aluminum alloy (added Ti) composites were investigated. The wear samples were prepared by adding different amounts of Ti (4%, 6%, and 8%) into A356 powder alloy by mechanical alloying. The mechanically alloyed powders were cold pressed at 600 MPa and sintered 530˝C for 1 h in argon atmosphere and cooled in the furnace. After the sintering process, the samples were characterized. The results show that AlTi and TiAl 3 intermetallic phases were formed and their amount increased depending on the amount of Ti added into A356 powder alloy. Out of the samples sintered with different titanium amounts (1 h at 530˝C), the highest hardness value and, accordingly, the lowest wear amount, were observed in the alloy containing 8% Ti.

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Section: Introductionmentioning

confidence: 99%

Wear Behaviour of A356/TiAl3 in Situ Composites Produced by Mechanical Alloying

Çam

Demir

Özyürek

2016

Metals

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“…Standard aluminum machining alloys are found within the 2xxx and 6xxx series alloys which contain lead (Pb), and, sometimes, bismuth (Bi) in order to improve the free-cutting behavior. The microstructure of these systems have previously been characterized by various experimental methods such as optical microscopy, scanning/transmission electron microscopy, microradiography, electron probe micro analysis, x-ray diffraction [3][4][5][6][7][8][9], calorimetry [9][10][11], and positron annihilation [12][13][14]. It has been shown that the alloying system consists of (i) low-melting element inclusions, (ii) hardness increasing precipitates, and (iii) aluminides [9].…”

Section: Introductionmentioning

confidence: 99%

A high temperature nanoindentation study of Al–Cu wrought alloy

Koch

Abad

Renhart

et al. 2015

Materials Science and Engineering: A

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a b s t r a c tAluminum-copper alloys are widely used because of their low density and good mechanical strength accomplished with precipitation hardening. The alloy Al-Cu-Mg-Pb (AA2030) has been investigated before and after aging, at room temperature and at high temperatures. The mechanical properties at room temperature have been studied by Brinell hardness tests. T4 and T6 stages of the alloy have been investigated by differential scanning calorimetry up to 450°C, showing the precipitation of different clusters. High temperature nanoindentation has been used to characterize the mechanical properties up to 460°C in order to obtain a better understanding of the local dominating deformation mechanism in the material. A continuous decrease in the hardness and Young's modulus was found with the increasing temperature. The strain rate sensitivity of the alloy increased with the temperature from 0.022 at RT, up to 0.16 at 460°C. The activation volume was constant (around 31-41 b 3 ) up to 240°C, beyond this point a large increase was observed up to 178 b 3 . The results were comparable with similar materials, and indicate thermally activated processes.

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“…Hardness value is also probably caused by Si eutectic and AlFeMgSi (Chinese script). However, the properties of Chinese script is hard but brittle so it tends to be avoided [8].…”

Section: Resultsmentioning

confidence: 99%

Characterization of Al-7Si-Mg-Cu Turbine Impeller Produced by Investment Casting

Syahid¹,

Sofyan²,

Basuki³

et al. 2013

AMR

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Abstract. Application of a light-weight material, such as an aluminum alloy, on a turbine impeller can enhance the efficiency of an Organic Rankine Cycle power plant that operates at temperatures below 150 o C. The density of an aluminum alloy is only one-third that of steel. However, increased strength of aluminum alloys is needed for turbine impeller qualification. Investment casting was chosen to produce radial inflow turbine impeller due to their complex geometry and precision. It can replace the machining process, which is time-consuming and less efficient because of material removal. This study describes the investment casting process used to produce a radial inflow impeller turbine. The study also identifies defects, microstructures and properties of radial inflow turbine impeller. The turbine impeller were produced from Al-7Si-4Mg alloy with 0.38, 3.82, and 6.0 wt. % Cu. Visual examination showed that the turbine impeller was free of macro defects and misruns. The microstructures of the component were characterized by Optical Microscopy and SEM. The structures consisted of α-Al, Si eutectic, AlMgSi, AlMgFeSi (Chinese script) and CuAl 2 . The higher hardness value of 54HRB was affected by Cu content due to the good mechanical properties of CuAl 2 phase.

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The influence of impurity level and tin addition on the ageing heat treatment of the 356 class alloy

Cited by 32 publications

References 33 publications

Wear Behaviour of A356/TiAl3 in Situ Composites Produced by Mechanical Alloying

Wear Behaviour of A356/TiAl3 in Situ Composites Produced by Mechanical Alloying

A high temperature nanoindentation study of Al–Cu wrought alloy

Characterization of Al-7Si-Mg-Cu Turbine Impeller Produced by Investment Casting

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