Review of recent developments in manufacturing lightweight multi-metal gears

Politis, Denis J.; Politis, Nicholas J.; Lin, Jianguo

doi:10.1007/s11740-020-01011-5

Cited by 13 publications

(7 citation statements)

References 106 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, steel, titanium, aluminum, boron-epoxy, UD graphite-epoxy, CP graphite-epoxy, kevlar-KM2, glass-polyester, CFRP (Carbon Fiber Reinforced Polymer), aluminum6061, AlSiC (Aluminum Silicon Carbide), T300 (T300/976 UD tape), ceramic and GFRP (Glass Fiber Reinforced Polymer) are selected as end plate of PEMFC material system. The elastic properties of all materials used in numerical analysis are listed in the Table 1 [26][27][28][29][30][31][32][33][34][35]. In this paper, strain eneregy release rate of the 14 different materials were investigated by numerical analysis of Arcan specimen.…”

Section: Resultsmentioning

confidence: 99%

A Numerical Investigation of The Fracture Energy of Materials for Fuel Cell End Plates

Avcu

Choupani²,

Tüccar³

2021

European Mechanical Science

View full text Add to dashboard Cite

Fossil fuels are used for energy procurement widely, so environmental pollution rises due to harmful gases release. The usage of clean energy sources has started to increase in order to prevent environmental pollution. For this reason, fuel cells have seen as a significant option among clean energy sources with its positive sides. Besides, research and development on fuel cells have become important issue. There are advantages of fuel cell's properties such as, being environmentally and friendly, not producing harmful gases, high efficiency, noiseless, no moving parts and therefore low maintenance required. At First, fuel cells were used in space and marine technology, usage of them has started to become more widespread with the great advances in fuel cells [1,2].Fuel cells are devices that convert chemical energy to electrical energy directly. They generally produce electricity and water by the reaction of Hydrogen and Oxygen. As a result of chemical reaction, they do not create harmful waste for the environment. Only water and heat are produced after chemical reaction, it is the most important feature of fuel cells in energy production [2-5].Generally, fuel cells are classified as Alkaline Fuel Cell (AFC), Direct Methanol Fuel Cell (DMFC), Proton Exchange Membrane Fuel Cell (PEMFC), Phosphoric Acid Fuel Cell (PAFC), Molten Carbonate Fuel Cell (MCFC) and Solid Oxide Fuel Cell (SOFC). Each of them has advantages with their specific features according to usage areas. PEMFC is used more widely today than other fuel cells. With its high voltage, current and power density, low pressure operation, corrosion-resistant electrolyte usage, tolerance to pressure change, simple structure, low temperature operation, portable usage, it is more accurate choice than the other fuel cells with its advantages [2,6,7].Metal, non-metal and composite materials are used as material of end plates in fuel cells. Composite materials are also preferred in fuel cells due to their light weight, corrosion resistance and high mechanical properties [8]. There are studies with composite on bipolar flow plates and end plate

show abstract

Section: Resultsmentioning

confidence: 99%

A Numerical Investigation of The Fracture Energy of Materials for Fuel Cell End Plates

Avcu

Choupani²,

Tüccar³

2021

European Mechanical Science

View full text Add to dashboard Cite

show abstract

“…Microhardness measurements were also carried out using the Vickers method with a load of 0.025 kgf to 1.0 kgf. The obtained results allowed us, through empirical models H-K [17][18][19][20], PSR [20][21][22], MPSR [20,23], and N-G [24][25][26], to determine the actual value of the tested alloy as regards microhardness measurements. At the same time, a detailed analysis of the model's accuracy was carried out using measures based on certified hardness standards, and it was found that the PSR model had the slightest error.…”

Section: Methodsmentioning

confidence: 99%

Structural Stability of Titanium-Based High-Entropy Alloys Assessed Based on Changes in Grain Size and Hardness

Górniewicz,

Karczewski,

Bojar

et al. 2023

Materials

View full text Add to dashboard Cite

The thermal stability of the grain structure and mechanical properties of the high-entropy two-phase TiCoCrFeMn alloy produced by powder metallurgy, assessed based on microhardness measurements, was analyzed in this work. For this purpose, material obtained via sintering using the U-FAST method was subjected to long-term heating at a temperature of 1000 °C for up to 1000 h in an argon atmosphere. For homogenization times of 1, 10, 20, 50, 100, and 1000 h, grain size changes in the identified phase components of the matrix were assessed, and microhardness measurements were conducted using the Vickers method. It has been shown that the changes in the analyzed parameters are closely correlated with non-monotonic modifications in the chemical composition. It was found that the tested alloy achieved structural stability after 100 h of annealing. A stable grain size was obtained in the BCC solid solution of approximately 2 µm and the two-phase BCC+C14 mixture of roughly 0.4 µm. Long-term heating for up to 1000 h caused the grain structure to grow to 2.7 µm and 0.7 µm, respectively, with a simultaneous decrease in hardness from 1065 HV to 1000 HV. The chromium and titanium diffusion coefficient values responsible for forming the BCC solid solution and the Laves C14 phase, including the material matrix, were also determined at this level to be DCr = 1.28 × 10−19 (m2·s−1) and DTi = 1.04 × 10−19 (m2·s−1), demonstrating the sluggish diffusion effect typical of high-entropy alloys.

show abstract

“…Conventional manufacturing (CM) techniques have been employed in the literature to fabricate multimaterial parts. Several CM processes, like casting, forging, and machining, as well as joining methods, like welding and riveting, have been used to produce such structures (Figure 10) [156,157]. These methods are very different than AM processes due to their shaping methodologies, utilizing both additive and subtractive approaches of manufacturing.…”

Section: Conventional Manufacturing Techniques and Multimaterials Fab...mentioning

confidence: 99%

Negative Thermal Expansion Metamaterials: A Review of Design, Fabrication, and Applications

Dubey,

Mirhakimi,

Elbestawi

2024

JMMP

View full text Add to dashboard Cite

Most materials conventionally found in nature expand with an increase in temperature. In actual systems and assemblies like precision instruments, this can cause thermal distortions which can be difficult to handle. Materials with a tendency to shrink with an increase in temperature can be used alongside conventional materials to restrict the overall dimensional change of structures. Such structures, also called negative-thermal-expansion materials, could be crucial in applications like electronics, biomedicine, aerospace components, etc., which undergo high changes in temperature. This can be achieved using mechanically engineered materials, also called negative thermal expansion (NTE) mechanical metamaterials. Mechanical metamaterials are mechanically architected materials with novel properties that are rare in naturally occurring materials. NTE metamaterials utilize their artificially engineered architecture to attain the rare property of negative thermal expansion. The emergence of additive manufacturing has enabled the feasible production of their intricate architectures. Industrial processes such as laser powder bed fusion and direct energy deposition, both utilized in metal additive manufacturing, have proven successful in creating complex structures like lattice formations and multimaterial components in the industrial sector, rendering them suitable for manufacturing NTE structures. Nevertheless, this review examines a range of fabrication methods, encompassing both additive and traditional techniques, and explores the diverse materials used in the process. Despite NTE metamaterials being a prominent field of research, a comprehensive review of these architected materials is missing in the literature. This article aims to bridge this gap by providing a state-of-the-art review of these metamaterials, encompassing their design, fabrication, and cutting-edge applications.

show abstract

Review of recent developments in manufacturing lightweight multi-metal gears

Cited by 13 publications

References 106 publications

A Numerical Investigation of The Fracture Energy of Materials for Fuel Cell End Plates

A Numerical Investigation of The Fracture Energy of Materials for Fuel Cell End Plates

Structural Stability of Titanium-Based High-Entropy Alloys Assessed Based on Changes in Grain Size and Hardness

Negative Thermal Expansion Metamaterials: A Review of Design, Fabrication, and Applications

Contact Info

Product

Resources

About