Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys
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 AA5056 and A356 with dispersed Al<sub>3</sub>Er and TiB<sub>2</sub>...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/6/1028 |
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| author | Oleg Matvienko Olga Daneyko Vladimir Valikhov Vladimir Platov Ilya Zhukov Aleksandr Vorozhtsov |
| author_facet | Oleg Matvienko Olga Daneyko Vladimir Valikhov Vladimir Platov Ilya Zhukov Aleksandr Vorozhtsov |
| author_sort | Oleg Matvienko |
| collection | DOAJ |
| description | 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 AA5056 and A356 with dispersed Al<sub>3</sub>Er and TiB<sub>2</sub> particles are used as the initial materials. Tensile strength testing of the obtained alloys shows that the addition of Al<sub>3</sub>Er 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 TiB<sub>2</sub> 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. A356 and A356–TiB<sub>2</sub> alloys are more brittle than the AA5056 and AA5056–Al<sub>3</sub>Er alloys. In the case of wide rotating disks, AA5056 and AA5056–Al<sub>3</sub>Er alloys are preferable. |
| first_indexed | 2024-03-11T02:10:53Z |
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| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T02:10:53Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-eafbc58c217b4303906056f4c4541f6e2023-11-18T11:35:49ZengMDPI AGMetals2075-47012023-05-01136102810.3390/met13061028Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened AlloysOleg Matvienko0Olga Daneyko1Vladimir Valikhov2Vladimir Platov3Ilya Zhukov4Aleksandr Vorozhtsov5Faculty of Physics and Engineering, National Research Tomsk State University, 634050 Tomsk, RussiaFaculty of Physics and Engineering, National Research Tomsk State University, 634050 Tomsk, RussiaFaculty of Physics and Engineering, National Research Tomsk State University, 634050 Tomsk, RussiaFaculty of Physics and Engineering, National Research Tomsk State University, 634050 Tomsk, RussiaFaculty of Physics and Engineering, National Research Tomsk State University, 634050 Tomsk, RussiaFaculty of Physics and Engineering, National Research Tomsk State University, 634050 Tomsk, RussiaThis 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 AA5056 and A356 with dispersed Al<sub>3</sub>Er and TiB<sub>2</sub> particles are used as the initial materials. Tensile strength testing of the obtained alloys shows that the addition of Al<sub>3</sub>Er 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 TiB<sub>2</sub> 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. A356 and A356–TiB<sub>2</sub> alloys are more brittle than the AA5056 and AA5056–Al<sub>3</sub>Er alloys. In the case of wide rotating disks, AA5056 and AA5056–Al<sub>3</sub>Er alloys are preferable.https://www.mdpi.com/2075-4701/13/6/1028rotating diskstress-strain statedispersion-hardened materialsnanoparticlesstrain hardeningplastic strain |
| spellingShingle | Oleg Matvienko Olga Daneyko Vladimir Valikhov Vladimir Platov Ilya Zhukov Aleksandr Vorozhtsov Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys Metals rotating disk stress-strain state dispersion-hardened materials nanoparticles strain hardening plastic strain |
| title | Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys |
| title_full | Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys |
| title_fullStr | Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys |
| title_full_unstemmed | Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys |
| title_short | Elastoplastic Deformation of Rotating Disk Made of Aluminum Dispersion-Hardened Alloys |
| title_sort | elastoplastic deformation of rotating disk made of aluminum dispersion hardened alloys |
| topic | rotating disk stress-strain state dispersion-hardened materials nanoparticles strain hardening plastic strain |
| url | https://www.mdpi.com/2075-4701/13/6/1028 |
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