Wear Behavior of Cooling Slope Rheocast A356 Al Alloy

Das, Pratulananda; Show, Bijay Kumar; Rathore, Aakash; Samanta, Sudip Kumar

doi:10.1080/10402004.2015.1040905

Cited by 14 publications

(5 citation statements)

References 37 publications

(13 reference statements)

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“…The volume of the sample was calculated using a vernier caliper. Then, porosity was measured using the formula = (1/ρ–1/ρ th )/1/ρ th , where ρ is the experimental density and ρ th is the theoretical density . Each SLM and DIW-processed composite was then polished with emery paper, and then diamond polishing was performed with 1 μm diamond paste using an Ecomet-3000 variable speed grinder polisher.…”

Section: Methodsmentioning

confidence: 99%

“…Then, porosity was measured using the formula = (1/ρ−1/ρ th )/1/ρ th , where ρ is the experimental density and ρ th is the theoretical density. 38 Each SLM and DIW-processed composite was then polished with emery paper, and then diamond polishing was performed with 1 μm diamond paste using an Ecomet-3000 variable speed grinder polisher. To know the surface morphology, Leica-DM2500M optical microscopy, and Jeol JSM-IT300HR were used.…”

Section: Characterizationsmentioning

confidence: 99%

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Engineering the Interface of Cu-hBN Immiscible System Using 3D Printing To Enhance Mechanical and Thermal Properties

Das,

Katiyar,

Sarkar

et al. 2024

ACS Appl. Eng. Mater.

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Various three-dimensional (3D) printing methods are being employed to optimize results in terms of rapid prototyping, cost-effectiveness, waste reduction, and properties of printed objects, among other factors. The use of composite materials in 3D printing significantly enhances mechanical, wear, and thermal properties. However, when dealing with thermodynamically immiscible composite systems, maintaining a homogeneous dispersion can be challenging. To address this challenge, two techniques have been utilized for the copper (Cu)-hexagonal boron nitride(hBN) immiscible system: one is laser melting-based, i.e., selective laser melting (SLM), and the other is ink-based printing, i.e., direct ink writing (DIW) with postprocessing sintering of the printed object to tailor the dispersion and interface between copper and hexagonal boron nitride (hBN). To facilitate the DIW process, a customized Cu-hBN composite ink was meticulously prepared by optimizing its rheological properties. Similarly, a mechanical mixture of copper and hexagonal boron nitride pellets underwent laser melting to form solid objects. Optical and scanning electron microscopy techniques reveal the surface morphology and the good distribution of hexagonal boron nitride within the copper matrix in both cases. The mechanical properties of the composites were assessed through micro-Vickers hardness testing, compression tests, and tribological analysis. Compression fracture morphologies of both processing techniques were examined. Through the SLM process, pores can be eradicated, whereas in the DIW process, the pore size can be tailored through DIW parameters and subsequent sintering parameters. Both selective laser melting and direct ink writing processed Cu-hBN composites show improved electrical conductivity compared with pure copper. Direct ink writing processed 2 wt %hBN shows better thermal conductivity than other investigated composites. Among selective laser melting and direct ink writing composites, Cu-1 wt %hBN shows higher YS of 32 and 22 MPa, respectively.

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Section: Methodsmentioning

confidence: 99%

Section: Characterizationsmentioning

confidence: 99%

Engineering the Interface of Cu-hBN Immiscible System Using 3D Printing To Enhance Mechanical and Thermal Properties

Das,

Katiyar,

Sarkar

et al. 2024

ACS Appl. Eng. Mater.

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show abstract

“…The EBSD scanning step size was 0.75 µm, with a collection rate of 194.92 Hz. The equivalent circle diameter method was employed to calculate the grain size of the samples, and the formula for the equivalent circle diameter method is as follows [ 41 , 42 , 43 ].

…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

Research on the Low-Temperature Impact Toughness of a New 100-mm Ultra-Thick Offshore Steel Fabricated Using the Narrow-Gap Laser Wire Filling Welding Process

Hou,

Guo,

Wang

et al. 2024

Materials

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Ultra-thick offshore steel, known for its high strength, high toughness, and corrosion resistance, is commonly used in marine platforms and ship components. However, when offshore steel is in service for an extended period under conditions of high pressure, extreme cold, and high-frequency impact loads, the weld joints are prone to fatigue failure or even fractures. Addressing these issues, this study designed a narrow-gap laser wire filling welding process and successfully welded a 100-mm new type of ultra-thick offshore steel. Using finite element simulation, EBSD testing, SEM analysis, and impact experiments, this study investigates the weld’s microstructure, impact toughness, and fracture mechanisms. The research found that at −80 °C, the welded joint exhibited good impact toughness (>80 J), with the impact absorption energy on the surface of the weld being 217.7 J, similar to that of the base material (225.3 J), and the fracture mechanism was primarily a ductile fracture. The impact absorption energy in the core of the weld was 103.7 J, with the fracture mechanism mainly being a brittle fracture. The EBSD results indicated that due to the influence of the welding thermal cycle and the cooling effect of the narrow-gap process, the grains gradually coarsened from the surface of the welded plate to the core of the weld, which was the main reason for the decreased impact toughness at the joint core. This study demonstrates the feasibility of using narrow-gap laser wire filling welding for 100-mm new type ultra-thick offshore steel and provides a new approach for the joining of ultra-thick steel plates.

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“…High strength and hardness, low density, excellent manufacturability and corrosion resistance, low cost, and good plasticity make Al alloys the material of choice for lightweight structure applications [1][2][3]. Aluminium alloy systems with different properties can be obtained by changing the composition and subjecting them to heat treatment [4].…”

Section: Introductionmentioning

confidence: 99%

Interfacial bonding of low-pressure plasma-sprayed Fe-based amorphous coating on 8090 Al–Li alloy

Hao

Wang

Chen

et al. 2023

Surface Engineering

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Fe-based amorphous coatings (AMC) are deposited on 8090 Al-Li alloy using low-pressure plasma spraying. Coating's microstructure and interfacial characteristics are investigated. The coating is mainly amorphous in structure. Some crystalline phases were observed between the two splats. The corrosion current density of this coating is two orders of magnitude less compared to 8090. The coating has high density as the average porosity is less than 0.5%. Because of partial melting and quick cooling of the 8090 alloy in the process of molten droplets deposition, there is an amorphous transition zone formed at the interface of AMC/ 8090 Al-Li alloy, which indicates localized metallurgical bonding. In electrochemical testing, the coating shows an obvious passivation tendency, and crystallization between splats is the main cause of corrosion. Owing to the low oxygen content, the coating exhibits excellent wear resistance.

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Wear Behavior of Cooling Slope Rheocast A356 Al Alloy

Cited by 14 publications

References 37 publications

Engineering the Interface of Cu-hBN Immiscible System Using 3D Printing To Enhance Mechanical and Thermal Properties

Engineering the Interface of Cu-hBN Immiscible System Using 3D Printing To Enhance Mechanical and Thermal Properties

Research on the Low-Temperature Impact Toughness of a New 100-mm Ultra-Thick Offshore Steel Fabricated Using the Narrow-Gap Laser Wire Filling Welding Process

Interfacial bonding of low-pressure plasma-sprayed Fe-based amorphous coating on 8090 Al–Li alloy

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