Deformation, microstructure, hardness, and pitting corrosion of 316 stainless steel after laser forming: A comparison between natural and forced cooling
Autor: | Morteza Chinizadeh, Seyed Rahim Kiahosseini |
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Rok vydání: | 2017 |
Předmět: |
010302 applied physics
Materials science Mechanical Engineering Metallurgy 02 engineering and technology Bending 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Grain size Mechanics of Materials 0103 physical sciences Pitting corrosion General Materials Science Irradiation Composite material Deformation (engineering) 0210 nano-technology Polarization (electrochemistry) Lasing threshold |
Zdroj: | Journal of Materials Research. 32:3046-3054 |
ISSN: | 2044-5326 0884-2914 |
Popis: | Sheets made of 316 stainless steel (100 × 100 × 1 mm3) were irradiated by laser at 1, 5, 10, and 15 passes under natural and forced cooling. Results showed that the deflection angle increased with the number of radiation passes. The bending angle after 15 passes of exposure under forced cooling was 5° higher than under natural cooling. The grain size under natural cooling increased from approximately 23–35 μm. By contrast, under forced cooling, the grain size decreased from approximately 37–27 μm. The sample hardness declined under natural cooling from approximately 212–200 HV. By contrast, sample hardness increased from approximately 216–233 HV under forced cooling. Polarization results show that the breakdown potential versus the number of lasing passes increased from −0.14 to −0.08 V under natural cooling and −0.16 to −0.06 V under forced cooling. |
Databáze: | OpenAIRE |
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