Effect of Process Parameters and High-Temperature Preheating on Residual Stress and Relative Density of Ti6Al4V Processed by Selective Laser Melting
| Autor: | Rudolf Pichler, Mateusz Skalon, Christof Sommitsch, David Paloušek, Benjamin Meier, Daniel Koutný, Martin Malý, Christian Höller |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Materials science chemistry.chemical_element residual stress 02 engineering and technology lcsh:Technology Article law.invention 020901 industrial engineering & automation Residual stress law Relative density General Materials Science Laser power scaling Composite material Selective laser melting lcsh:Microscopy lcsh:QC120-168.85 preheating lcsh:QH201-278.5 lcsh:T Ti6Al4V deformation Titanium alloy 021001 nanoscience & nanotechnology Laser chemistry lcsh:TA1-2040 relative density lcsh:Descriptive and experimental mechanics Selective Laser Melting lcsh:Electrical engineering. Electronics. Nuclear engineering Deformation (engineering) powder degradation 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 Titanium |
| Zdroj: | Materials, Vol 12, Iss 6, p 930 (2019) Materials Volume 12 Issue 6 Materials . 2019, vol. 12, issue 6, p. 1-13. |
| ISSN: | 1996-1944 |
| Popis: | The aim of this study is to observe the effect of process parameters on residual stresses and relative density of Ti6Al4V samples produced by Selective Laser Melting. The investigated parameters were hatch laser power, hatch laser velocity, border laser velocity, high-temperature preheating and time delay. Residual stresses were evaluated by the bridge curvature method and relative density by the optical method. The effect of the observed process parameters was estimated by the design of experiment and surface response methods. It was found that for an effective residual stress reduction, the high preheating temperature was the most significant parameter. High preheating temperature also increased the relative density but caused changes in the chemical composition of Ti6Al4V unmelted powder. Chemical analysis proved that after one build job with high preheating temperature, oxygen and hydrogen content exceeded the ASTM B348 limits for Grade 5 titanium. |
| Databáze: | OpenAIRE |
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