Evolution of Mesoscopic Deformation-Induced Surface Roughness and Local Strains in Tensile Polycrystalline Aluminum
| Autor: | O. Nekhorosheva, Ruslan Balokhonov, Varvara Romanova, Ilya Vlasov, V. S. Shakhidzhanov, E. N. Moskvichev |
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| Rok vydání: | 2021 |
| Předmět: |
Mesoscopic physics
Materials science шероховатость поверхности локализация пластической деформации Surfaces and Interfaces Surface finish Condensed Matter Physics Mechanics of Materials Ultimate tensile strength Surface roughness General Materials Science Profilometer Composite material Deformation (engineering) Displacement (fluid) алюминиевые сплавы Dimensionless quantity |
| Zdroj: | Physical Mesomechanics. 2021. Vol. 24, № 5. P. 570-577 |
| ISSN: | 1990-5424 1029-9599 |
| Popis: | This paper experimentally investigates the process of deformation-induced mesoscopic surface roughening in commercially pure aluminum under uniaxial tension. Surface profiles are recorded in selected observation areas at different stages of stretching using a contact profilometer. It is shown that multiscale undulations are formed on the surface from the very beginning of plastic deformation and evolve during stretching. The undulations formed due to the collective displacement of 10–15 grains make the greatest contribution to roughening. A quantitative assessment and comparison of the behavior of mesoscopic undulations are carried out using a dimensionless parameter of the degree of roughness, which is the ratio of profile length to evaluation length, determined for the obtained surface profiles in the studied strain range. A correlation between the roughness degree and local plastic strains is established. |
| Databáze: | OpenAIRE |
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