Influence of porosity on the thermal, electrical, and mechanical performance of selective laser melted stainless steel
| Autor: | Tan Pan, Frank W. Liou, Daniel S. Stutts, Lauren B. Tomanek |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Materials science Alloy Biomedical Engineering 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Forced convection 020901 industrial engineering & automation Thermal conductivity Electrical resistivity and conductivity Ultimate tensile strength Thermal engineering General Materials Science Composite material Selective laser melting 0210 nano-technology Porosity Engineering (miscellaneous) |
| Zdroj: | Additive Manufacturing. 39:101886 |
| ISSN: | 2214-8604 |
| DOI: | 10.1016/j.addma.2021.101886 |
| Popis: | This study verifies a novel approach to determine the thermal conductivity developed by the first two authors (Tomanek and Stutts) [1] as applied to additively manufactured selective laser melted stainless steel 304L specimens having a range of 1.4 to seven percent porosity. The selective laser melting technique is highly dependent on the process parameters used, unlike traditionally manufactured materials, and can cause the thermal, electrical, and mechanical properties to vary considerably from the bulk alloy. For this study, the thermal conductivity and several auxiliary parameters were estimated using a Levenberg-Marquardt nonlinear least squares algorithm. The parameter estimation used a model of a one-dimensional transient heat diffusion PDE with a closed-form solution of a slender rod under forced convection. In addition to the thermal conductivity’s dependency on porosity, the correlated porosity dependency on electrical conductivity was examined. The results were corroborated by mechanical tensile tests as well. The stainless steel 304L selective laser melted specimens saw a degradation of mechanical, thermal, and electrical performance with increasing porosity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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