Effects of microstructure and internal defects on mechanical anisotropy and asymmetry of selective laser-melted 316L austenitic stainless steel
| Autor: | Sun Hong Park, Jeong Min Park, Jung Gi Kim, Yujin Seong, Hyoung Seop Kim, Ji-Hun Yu, Jin Myoung Jeon |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Tension (physics) Mechanical Engineering 02 engineering and technology Strain hardening exponent engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Compression (physics) Microstructure 01 natural sciences Mechanics of Materials 0103 physical sciences engineering General Materials Science Elongation Selective laser melting Composite material Austenitic stainless steel 0210 nano-technology Anisotropy |
| Zdroj: | Materials Science and Engineering: A. 763:138152 |
| ISSN: | 0921-5093 |
| Popis: | In this study, the anisotropic and asymmetric mechanical behaviors of 316 L stainless steel processed using selective laser melting, were investigated experimentally and theoretically by performing tension and compression tests along different directions of the sample. Significant anisotropic and asymmetric behaviors were observed due to the effects of microstructure and internal defects. Severe anisotropy in stress level and elongation were found in the tensile behavior, while compression behavior exhibited somewhat different yield strength and strain hardening with loading direction. Finite element simulations based on the real microstructure and microstructural analysis confirmed that pore shape and molten pool boundary are the major reasons for the mechanical anisotropy and asymmetry. This result supports a guideline for designing parts and the scanning directions used in selective laser melting. |
| Databáze: | OpenAIRE |
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