Residual Stresses Induced by Surface Working and Their Improvement by Emery Paper Polishing
In many of machine parts and structural components, materials surface would be worked. In this study, residual stresses on the surfaces were measured by X-ray diffraction method, and effects of surface working on the residual stresses were examined. In case of lathe machining of type 304 stainless s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Quantum Beam Science |
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| Online Access: | https://www.mdpi.com/2412-382X/4/2/21 |
| _version_ | 1797568059103248384 |
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| author | Makoto Hayashi |
| author_facet | Makoto Hayashi |
| author_sort | Makoto Hayashi |
| collection | DOAJ |
| description | In many of machine parts and structural components, materials surface would be worked. In this study, residual stresses on the surfaces were measured by X-ray diffraction method, and effects of surface working on the residual stresses were examined. In case of lathe machining of type 304 stainless steel bar, the residual stresses in circumferential directions are tensile, and those in axial directions are almost compressive. Highly tensile residual stresses in the circumferential directions were improved by emery paper polishing. 10 to 20 times of polishing changes high tensile residual stresses to compressive residual stresses. In the case of shot peening on a type 304 stainless steel plate, the compressive residual stress inside is several hundred MPa lower than that on the surface. By applying the emery paper polishing to the shot peened surface 10 or 20 times, the residual stress on the surface is improved to −700 MPa. While fatigue strength at 288 °C in the air of the shot peened material is 30 MPa higher than solution heat treated and electro-polished material, the fatigue strength of the shot peened and followed by emery paper polished material is 60 MPa higher. Thus, the emery paper polishing is simple and a very effective process for improvement of the residual stresses. |
| first_indexed | 2024-03-10T19:50:59Z |
| format | Article |
| id | doaj.art-dd48f14f45344c979ee92d291b8bcfb0 |
| institution | Directory Open Access Journal |
| issn | 2412-382X |
| language | English |
| last_indexed | 2024-03-10T19:50:59Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Quantum Beam Science |
| spelling | doaj.art-dd48f14f45344c979ee92d291b8bcfb02023-11-20T00:23:29ZengMDPI AGQuantum Beam Science2412-382X2020-05-01422110.3390/qubs4020021Residual Stresses Induced by Surface Working and Their Improvement by Emery Paper PolishingMakoto Hayashi0Hitachi, Ltd., 1-1, Saiwai-cho, 3-chome, Hitachi, Ibaraki 317-0017, JapanIn many of machine parts and structural components, materials surface would be worked. In this study, residual stresses on the surfaces were measured by X-ray diffraction method, and effects of surface working on the residual stresses were examined. In case of lathe machining of type 304 stainless steel bar, the residual stresses in circumferential directions are tensile, and those in axial directions are almost compressive. Highly tensile residual stresses in the circumferential directions were improved by emery paper polishing. 10 to 20 times of polishing changes high tensile residual stresses to compressive residual stresses. In the case of shot peening on a type 304 stainless steel plate, the compressive residual stress inside is several hundred MPa lower than that on the surface. By applying the emery paper polishing to the shot peened surface 10 or 20 times, the residual stress on the surface is improved to −700 MPa. While fatigue strength at 288 °C in the air of the shot peened material is 30 MPa higher than solution heat treated and electro-polished material, the fatigue strength of the shot peened and followed by emery paper polished material is 60 MPa higher. Thus, the emery paper polishing is simple and a very effective process for improvement of the residual stresses.https://www.mdpi.com/2412-382X/4/2/21residual stressX-ray diffractionlathe machiningshot peeningemery paper polishingaustenitic stainless steel |
| spellingShingle | Makoto Hayashi Residual Stresses Induced by Surface Working and Their Improvement by Emery Paper Polishing Quantum Beam Science residual stress X-ray diffraction lathe machining shot peening emery paper polishing austenitic stainless steel |
| title | Residual Stresses Induced by Surface Working and Their Improvement by Emery Paper Polishing |
| title_full | Residual Stresses Induced by Surface Working and Their Improvement by Emery Paper Polishing |
| title_fullStr | Residual Stresses Induced by Surface Working and Their Improvement by Emery Paper Polishing |
| title_full_unstemmed | Residual Stresses Induced by Surface Working and Their Improvement by Emery Paper Polishing |
| title_short | Residual Stresses Induced by Surface Working and Their Improvement by Emery Paper Polishing |
| title_sort | residual stresses induced by surface working and their improvement by emery paper polishing |
| topic | residual stress X-ray diffraction lathe machining shot peening emery paper polishing austenitic stainless steel |
| url | https://www.mdpi.com/2412-382X/4/2/21 |
| work_keys_str_mv | AT makotohayashi residualstressesinducedbysurfaceworkingandtheirimprovementbyemerypaperpolishing |