Recent advances in tribology of high entropy alloys: A critical review

Kumar, Deepak

doi:10.1016/j.pmatsci.2023.101106

Cited by 79 publications

(10 citation statements)

References 445 publications

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“…The newest trend are high entropy alloys which go completely beyond existing copper alloy families. This concept is are also being considered for innovative alloys in sliding applications [11].…”

Section: Trends and Development Of New Copper Alloys For Sliding Appl...mentioning

confidence: 99%

The New Lead-Free Copper Alloy CuAl8Fe5Ni4Zn4Sn1 for Plain Bearings and Its Strengthening Mechanisms

Reetz,

Münch

2024

Preprint

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CuAl8Fe5Ni4Zn4Sn1 (OF 2238) is a new lead-free copper alloy for plain bearing applications that was first officially presented in a scientific journal in 2020. Soon after its invention, the use of the alloy for connecting rod bushings in heavy duty internal combustion engines was promoted and validated with customers. The aim of this article is to describe the material properties of the new alloy in more detail than previously and explain how the advantageous properties of CuAl8Fe5Ni4Zn4Sn1 are generated. At the beginning of the article, the general development trends in the field of copper alloys for sliding applications are presented. This is followed by a presentation of the latest research results about CuAl8Fe5Ni4Zn4Sn, before concluding with a brief summary and future outlook, emphasizing on the fact that recent trends in copper-based sliding applications show great additional potential for further material developments.

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Section: Trends and Development Of New Copper Alloys For Sliding Appl...mentioning

confidence: 99%

The New Lead-Free Copper Alloy CuAl8Fe5Ni4Zn4Sn1 for Plain Bearings and Its Strengthening Mechanisms

Reetz,

Münch

2024

Preprint

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“…The newest trend is high-entropy alloys, which go completely beyond the existing copper alloy families. This concept is also being considered for innovative alloys in sliding applications [25].…”

Section: Current Copper Materials and Development Trends Of New Coppe...mentioning

confidence: 99%

A New Lead-Free Copper Alloy CuAl8Fe5Ni4Zn4Sn1 for Plain Bearings and Its Strengthening Mechanisms

Reetz,

Münch

2024

Metals

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CuAl8Fe5Ni4Zn4Sn1 (OF 2238) is a new lead-free copper alloy for plain-bearing applications that was first officially presented in a scientific journal in 2020. Soon after its invention, the use of the alloy for connecting rod bushings in heavy-duty internal combustion engines was promoted and validated with customers. The aim of this article is to describe the material properties of the new alloy in more detail than previously and explain how the advantageous properties of CuAl8Fe5Ni4Zn4Sn1 are generated. At the beginning of this article, the general development trends in the field of copper alloys for sliding applications are presented, into which the new alloy from this publication can be classified. In the main part of this publication, the authors go through the production chain of CuAl8Fe5Ni4Zn4Sn and show how the entire manufacturing process contributes to obtaining a material with a combination of high strength, ductility and sufficient toughness. This starts with fine microstructures after casting, followed by homogenisation and refinement during hot extrusion and work hardening chiefly during cold drawing. What is most surprising, however, is the finding that a strong hardening effect can be achieved in the new alloy by precipitation of fine κ-phase at temperatures of about 400 °C and air cooling without prior solution treatment. These results make it clear that there is great potential for further material developments to support material efficiency and even to expand the application limits.

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“…6 Representing one of the most rapidly developing directions in alloy research since the 21st century, HEAs challenge traditional alloy design paradigms and extend to the core of phase diagrams. 7,8 The multi-principal element design approach in HEAs results in an alloy system with significantly increased mixing entropy. This approach makes it ARTICLE pubs.aip.org/aip/adv challenging to control the formation of intermetallic compounds, which contain hard and brittle phases.…”

Section: Introductionmentioning

confidence: 99%

An investigation on the jet formation and penetration characteristics of the CuCoCrFeNi high-entropy alloy liner

Li,

Wang,

Tian

et al. 2024

AIP Advances

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This study performs a series of mechanical tests, quasi-static and dynamic, on CuCoCrFeNi high-entropy alloys (HEAs) using an experimental setup to explore the performance of Cu-based HEAs in shaped charges. It derives the parameters for the Johnson–Cook constitutive model through fitting. A static penetration test is conducted with a small cone angle and a thin-walled liner. The outcomes are then compared to simulation data generated by AUTODYN software. They indicated that the CuCoCrFeNi HEA liner can produce a shaped-charge jet that achieves both penetration and reaming effects when driven by explosives. In a C45 steel target, the diameter of the penetration hole is 46.43% of the charge diameter. The experimental findings align closely with the simulations, indicating discrepancies of less than 12.13% in the diameters of the penetration holes and ∼2.56% in penetration depths. Hence, the numerical simulation approach and its parameters can be utilized to investigate the penetration characteristics of Cu-based HEA jets, providing a groundwork for future optimization of HEA-shaped charge designs.

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Recent advances in tribology of high entropy alloys: A critical review

Cited by 79 publications

References 445 publications

The New Lead-Free Copper Alloy CuAl8Fe5Ni4Zn4Sn1 for Plain Bearings and Its Strengthening Mechanisms

The New Lead-Free Copper Alloy CuAl8Fe5Ni4Zn4Sn1 for Plain Bearings and Its Strengthening Mechanisms

A New Lead-Free Copper Alloy CuAl8Fe5Ni4Zn4Sn1 for Plain Bearings and Its Strengthening Mechanisms

An investigation on the jet formation and penetration characteristics of the CuCoCrFeNi high-entropy alloy liner

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