The comparative study of conventional and ultra-high frequency induction sintering behavior of pure aluminum

Gül, Burak; Gezici, Levent Ulvi; Ayvaz, Mehmet; Çavdar, Uğur

doi:10.35860/iarej.729395

Cited by 8 publications

(3 citation statements)

References 34 publications

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“…Thus, materials with superior mechanical and physical properties can be produced. [5][6][7] Composite materials are new-generation materials obtained by combining different materials. These materials are obtained by combining at least two materials, which have two essential components: matrix and reinforcement element.…”

Section: Introductionmentioning

confidence: 99%

Effect of graphene content and induction hot pressing on tribological and mechanical behavior of Al6061-based composites

Şenel,

Demir

2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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This work intends to fabricate Al6061 alloy and Al6061-graphene composites via powder metallurgy and induction hot pressing techniques. This study also investigates the effect of graphene content (0.15, 0.30, and 0.45 wt.%), heat-treatment process (sintering, hot-pressing process), and applied load (5 and 10 N) on the compressive strength, hardness, density, mass loss, friction coefficient, wear rate, and microstructure. Tribological test results showed that minimum mass loss (0.0011 g), wear rate (8.5 × 10−8 mm3/(Nm)), and friction coefficient (0.23) were obtained at sintered and hot-pressed Al6061–0.15 wt.%graphene composite for a 5 N load. Hardness and compressive strength increased from 95 HV, 253 MPa (Al6061 alloy) to 151 HV, 395 MPa (Al6061–0.15 wt.%graphene) with sintering and induction hot pressing process, respectively. Compared to Al6061 alloy, the wear rate and compressive strength of Al6061–0.15 wt.%graphene improved by 30% and 33% for sintered and hot-pressed specimens, respectively. It has been determined that the tribological and mechanical properties of sintered and hot-pressed specimens are ∼15% better than those of only sintered samples. As a result of the paper, it was concluded that the addition of uniformly dispersed graphene and the induction hot-pressing process enhanced the mechanical and tribological behavior of aluminum-based composites.

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Section: Introductionmentioning

confidence: 99%

Effect of graphene content and induction hot pressing on tribological and mechanical behavior of Al6061-based composites

Şenel,

Demir

2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Powder metallurgy (PM) has experienced great technological development, if compared to conventional processes involved in the manufacturing of components applied under critical conditions of temperature, corrosion, wear, and mechanical resistance. PM is a cleaner technology, providing better use of the resources, with a production-wide scrap index of less than 5% and requiring a lower waste disposal cost and recycling being an alternative, if compared to processes such as casting, forging, stamping, or machining [10,11].…”

Section: Introductionmentioning

confidence: 99%

Influence of ball milling parameters on microstructure and magnetic properties of aluminum bronze chips reinforced with vanadium carbide

Dias

Silva

2021

Int J Adv Manuf Technol

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This article analyzes the influence of mechanical ball milling parameters on processed aluminum bronze chips in order to increase the efficiency of this process in terms of particles' size reduction. Also evaluated is the addition of vanadium carbide (VC) in this response, along with its microstructure and magnetic properties. The experiments have been carried out in accordance with DOE design methodology. After machined, its residues can still be reused to produce composites through powder metallurgy routes, preserving good mechanical properties without onus to the environment. The study aims to produce and characterize powders resulting from ball milling processes, identifying the influential parameters, in addition to verify its soft magnetization behavior. The powder morphologies and particle sizes underwent scanning electron microscopy (SEM), coupled with energy-dispersive spectroscopy (EDS) and laser diffraction particle analyses, respectively, in addition to phase identification via X-ray diffraction (XRD). Moreover, saturation magnetization (M s ), remanent magnetization (M r ), coercivity (H c ), and remanence-to-saturation ratio (M r /M s ) were determined through magnetic hysteresis curves obtained from a vibrating sample magnetometer (VSM). Results indicate that % VC and milling time are the main parameters to improve the milling efficiency and obtain submicrometric particles with sizes almost 800 times smaller than the initial chips. After the milling process, aluminum bronze powders presented certain amorphization, a decrease of about 24% in M s and an elevation about 81% in H c , both compared with the as cast material. The M r /M s ratio indicates a slight conservation of magnetization.

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“…In addition, it is possible to good control the volume fraction, geometry and size of the pores by the PM method. However, as in other high-temperature manufacturing methods, one of the biggest problem in PM is the oxidation of the metallic material to be produced due to the high temperature of the sintering process [15][16][17][18]. In order to prevent this, "vacuum", "inert gas (argon etc)" or "reducing gas" atmospheres, which are called protective atmospheres, must be created in the sintering furnace during production, and this increases the production cost.…”

Section: Introductionmentioning

confidence: 99%

The production of open cell Ni-foam using KBr as spacer and oxidation shield via powder metallurgy technique

Gök

2021

International Advanced Researches and Engineering Journal

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Metallic materials having a porosity of 70% or more are generally referred as highly porous metals. In this study, highly porous pure nickel materials were produced by powder metallurgy route. In the production process, potassium bromide was used both as a space-holder phase and as an oxidation shield. In the method, firstly, nickel and potassium bromide powders were mixed according to the desired void ratio. The obtained nickel-potassium bromide powders were pressed in a hydraulic press and turned into pellets (diameter: 13mm). Then, these pellets were pressed again in a wider mold (diameter: 21mm) so that all surfaces were covered with potassium bromide, and the encapsulation process was carried out. These capsules were embedded in potassium bromide in an alumina crucible for sintering. The sintering process was carried out in an open atmosphere at 1050 °C for 60 minutes. After the sintering process, the crucibles were kept in water to dissolve the crystallized potassium bromide around and inside the sample. Density, macrostructure, microstructure and EDS analyzes were performed on the samples. It was observed that open cell pores (58.3 -78.1% vol) with diameters varying between 5 and 500 µm, which are homogeneously distributed in nickel, have been successfully obtained. In addition, it was proved that nickel foam materials can be produced in different sizes and designs.

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The comparative study of conventional and ultra-high frequency induction sintering behavior of pure aluminum

Cited by 8 publications

References 34 publications

Effect of graphene content and induction hot pressing on tribological and mechanical behavior of Al6061-based composites

Effect of graphene content and induction hot pressing on tribological and mechanical behavior of Al6061-based composites

Influence of ball milling parameters on microstructure and magnetic properties of aluminum bronze chips reinforced with vanadium carbide

The production of open cell Ni-foam using KBr as spacer and oxidation shield via powder metallurgy technique

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