Microstructural, mechanical and tribological characterization of Cu-Co-Ni-Be alloy processed via equal channel angular pressing

Demirtas, M.

doi:10.1016/j.mtcomm.2021.102676

Cited by 6 publications

(1 citation statement)

References 41 publications

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“…Severe plastic deformation (SPD) methods enable improvement of the material properties without changing elemental content. SPD methods introduce high strains into microstructure that decrease grain size to the ultrafine grain range (Gunay-Bulutsuz et al , 2018; Demirtas, 2021). High-pressure torsion (HPT) is one of the SPD methods that can be used as a solid-state consolidation method of powders.…”

Section: Introductionmentioning

confidence: 99%

Tribological behavior of high-pressure torsion processed biodegradable pure Zn under dry and wet conditions

Bulutsuz

2022

ILT

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Purpose Zn has been attracting increasing attention with its biological compatibility property as a degradable implant material. Besides mechanical properties, especially for bone implant applications, wear resistance is a crucial mechanical property. The purpose of this study is to investigate HPTed Zn samples’ tribological behavior under dry and simulated body fluid (SBF) lubrication conditions. Design/methodology/approach Pure Zn powders were consolidated via the high-pressure torsion (HPT) method with 1, 5 and 10 rotations. Cast pure Zn samples were used as the control group. The wear behavior of pure Zn samples was investigated under dry and SBF lubrication conditions with a ball-on testing method. The wear tracks were observed with a mechanical profilometer and scanning electron microscope (SEM). Findings The application of HPT not only improved the mechanical strength and degradation performance but also improved wear resistance. However, tests with SBF resulted in higher wear rates. Besides, SBF significantly masked the positive effect of HPT on the coefficient of friction (COF). Although with SBF tests, 10 HPT rotation samples resulted in the lowest wear width and volume. Originality/value The main originality of this study is to reveal the HPT process and SBF effects on the tribological behavior of pure Zn to observe their potential usage for bone implant applications.

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Section: Introductionmentioning

confidence: 99%

Tribological behavior of high-pressure torsion processed biodegradable pure Zn under dry and wet conditions

Bulutsuz

2022

ILT

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Effect of severe plastic deformation on the precipitation kinetics and the properties of CuCoNiBe alloys

Elibol

2022

Materials Today Communications

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The effect of tooling design and properties of materials on fracture and deformation through equal channel angular pressing technique

Singh,

Kumar Agrawal

2024

MATEC Web Conf.

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The submicrometer range of grain sizes was reached for AA5083 by using equal channel angular pressing at room temperature. While the submicrometer grains of AA5083 were stable up to annealing temperatures of 300 °C, the stability of these grains was only moderately maintained up to annealing temperatures of about 200 °C. Tensile tests conducted after one pass of equal channel angular pressing—that is, strain introduction of roughly one—showed a significant increase in the 0.2% proof stress and ultimate tensile stress values for each alloy. Concurrent with this improvement, the elongations to failure decreased. The analysis shows that the square root of the magnesium content in each alloy corresponds with the magnitudes of these stresses. In samples that were cold rolled, comparable values of proof stresses and ultimate tensile stress were obtained at equivalent strains. However, because of the induction of a very small grain size, elongations to failure were higher after applying equal channel angular pressing to similar strains greater than one. The effects of material constitutive behaviour, tool design, and friction conditions on metal flow, stress fields, and the tendency for tensile fracture during the equal channel angular pressing process were studied using a finite element modelling technique. A degree of non-uniform flow was noted that extended past the head and tail of the extrusion when materials were subjected to equal channel angular pressing with varying constitutive behaviours or when utilising tooling with a radiused front leg. It is anticipated that tool design and material qualities will have a considerable effect on tensile stresses and, in turn, the development of tensile damage during equal channel angular pressing.

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Microstructural, mechanical and tribological characterization of Cu-Co-Ni-Be alloy processed via equal channel angular pressing

Cited by 6 publications

References 41 publications

Tribological behavior of high-pressure torsion processed biodegradable pure Zn under dry and wet conditions

Tribological behavior of high-pressure torsion processed biodegradable pure Zn under dry and wet conditions

Effect of severe plastic deformation on the precipitation kinetics and the properties of CuCoNiBe alloys

The effect of tooling design and properties of materials on fracture and deformation through equal channel angular pressing technique

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