Positron Annihilation Spectroscopy Study of Metallic Materials after High-Speed Cutting
| Autor: | Jinquan Li, Roman Laptev, Iurii Bordulev, Krzysztof Siemek, Pawel Horodek, Haolun Shen, Anton Lomygin, Jian Cui |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Technology
Microscopy QC120-168.85 дефекты QH201-278.5 microstructure positron annihilation metals Engineering (General). Civil engineering (General) слои высокоскоростная резка TK1-9971 позитроны Descriptive and experimental mechanics аннигиляция white layer General Materials Science high-speed cutting defects Electrical engineering. Electronics. Nuclear engineering TA1-2040 металлы микроструктуры |
| Zdroj: | Materials; Volume 15; Issue 3; Pages: 1017 Materials Materials, Vol 15, Iss 1017, p 1017 (2022) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma15031017 |
| Popis: | During high-speed cutting, a white layer is often produced on the machined surfaces after mechanical machining, seriously affecting the mechanical properties. These properties are related to the material structure and the defects induced by cutting. However, there is a lack of research on the atomic-scale defects of the white layer. This paper studied the influence of cutting parameters, namely the feed rate, cutting speed and cutting depth, on atomic-scale defects induced by high-speed cutting in GCr15 steel. Positron annihilation studies showed typical plastically deformed or tempered carbon steel defects with additional vacancy cluster components. The quantity of these clusters changed with cutting parameters. Furthermore, significant changes were observed in the subsurface region up to 1 µm, occurring as a result of simultaneous phase transformations, deformation and thermal impacts. The predominant accumulation of only one type of atomic-scale defect was not observed. |
| Databáze: | OpenAIRE |
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