Strengthening Particle Size Effect on Residual Stresses in Dispersion-Hardened Alloy

Матвиенко, О. В.; Daneyko, O. I.; Kovalevskaya, Т. А.

doi:10.1007/s11182-018-1484-5

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…In order to calculate stresses in the disk material, we used the approach described in detail in [58][59][60][61]. Based on this approach, stresses in the disk material were calculated using solid mechanics equations [62][63][64][65].…”

Section: Introductionmentioning

confidence: 99%

“…Based on this approach, stresses in the disk material were calculated using solid mechanics equations [62][63][64][65]. In order to calculate stresses in the disk material, we used the approach described in detail in [58][59][60][61]. Based on this approach, stresses in the disk material were calculated using solid mechanics equations [62][63][64][65].…”

Section: Introductionmentioning

confidence: 99%

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Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys

Матвиенко

Daneyko

Valikhov

et al. 2023

Metals

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This paper studies the plastic deformation of a rotating disk made of aluminum dispersion-hardened alloys using mechanical tensile tests and a structured study using optical microscopy methods. Alloys such as АА5056 and A356 with dispersed Al3Er and TiB2 particles are used as the initial materials. Tensile strength testing of the obtained alloys shows that the addition of Al3Er particles in the AA5056 alloy composition leads to an increase in its ultimate stress limit (USL) and plasticity from 170 to 204 MPa and from 14.7 to 21%, respectively, although the modifying effect is not observed during crystallization. The addition of TiB2 particles to the A356 alloy composition also leads to a simultaneous increase in the yield strength, USL, and plasticity from 102 to 145 MPa, from 204 to 263 MPa, and from 2.3 to 2.8%, respectively. The study of the stress-strain state of the disk was carried out in the framework of deformed solid mechanics. The equilibrium equations were integrated analytically, taking into account the hardening conditions obtained from the experimental investigations. This made it possible to write the analytical relations for the radial and circumferential stresses and to determine the conditions of plastic deformation and loss of strength. The plastic resistance of a disk depends on the ratio between its outer and inner radii. The plastic resistance decreases with increasing disk width at a constant inner radius, which is associated with a stronger effect from the centrifugal force field. At a higher rotational rate of narrow disks, the tangential stresses are high and can exceed the USL value. А356 and А356–TiB2 alloys are more brittle than the AA5056 and AA5056–Al3Er alloys. In the case of wide rotating disks, AA5056 and AA5056–Al3Er alloys are preferable.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys

Матвиенко

Daneyko

Valikhov

et al. 2023

Metals

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“…The mathematical model is based on equations of the balance of the defect structure [35][36][37] and principles of mechanics of deformable solids [38][39][40]. In this paper, to study the stress state of the tube made from aluminum alloy strengthened by nanoparticles, numerical simulation was used.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of Plastic Deformation of a Tube from Dispersion-Hardened Aluminum Alloy in an Inhomogeneous Temperature Field

2020

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The effect of temperature distribution on a stress–strain state tube made of disperse-hardened aluminum alloy subjected to internal pressure was investigated. The mathematical model is based on equations of physical plasticity theory and principles of mechanics of deformable solids. The results of this investigation demonstrate that varying the outer wall temperature in the range of 200 K at a fixed temperature of the inner wall leads to a significant change in the plastic resistance limit (for the considered tube sizes, this change is approximately 15%). An increase of the tube wall temperature reduces the resistance to plastic deformation. For the same absolute temperature difference between the outer and inner walls, the plastic resistance limit is less for the higher temperature of the inner wall of the tube. A decrease of the distances between the hardening particles at the same volume fraction of second phase leads to a significant increase in the pressure required to achieve plastic deformation of the tube walls. An increase in tube wall temperature reduces the resistance to plastic deformation. For the same absolute temperature difference between the outer and inner walls, the plastic resistance limit is lower for the higher temperature of the inner tube wall. The decrease of the distance between the hardening particles at the same volume fraction of the second phase leads to a significant increase in the pressure required to achieve plastic deformation of the tube walls.

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“…In case when the applied pressure less the limit of elastic resistance the deformation of tube is elastic. For the elastic deformation, the additional relation can be obtained using the stress compatibility equation which in the case of the axisymmetric problem takes the form [44]…”

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confidence: 99%

Mathematical modeling of plastic deformation of a tube from dispersion-hardened aluminum alloy

2018

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The influence of the internal and external pressure subjected to the tube from dispersion-hardened aluminium alloy was investigated. The approach which combines methods of crystal plasticity and mechanics of deformable solid was used to explore the limits of elastic and plastic resistance. The mathematical model of plastic deformation includes balance equations for deformation defects with regard to the generation and annihilation of shear dislocations, vacancy and interstitial prismatic dislocation loops, and dislocations in dipole configurations of vacancy and interstitial types and also equilibrium equation, geometrical and physical relations between the deformations, displacements and stresses. It has been established that as the temperature increases, the limits of the elastic and plastic resistance decrease. Results of investigation demonstrate that the hardening the alloy by nanoparticles significantly improves the strength characteristics of the material.

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Strengthening Particle Size Effect on Residual Stresses in Dispersion-Hardened Alloy

Cited by 9 publications

References 9 publications

Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys

Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys

Mathematical Modeling of Plastic Deformation of a Tube from Dispersion-Hardened Aluminum Alloy in an Inhomogeneous Temperature Field

Mathematical modeling of plastic deformation of a tube from dispersion-hardened aluminum alloy

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