Speaker
Description
Hydraulic components are subjected to high internal pressures and repeated pressure fluctuations during operation. Pressure impulse testing is commonly used to assess their safety and functional reliability. However, limited data are available on the dynamic strength of additively manufactured hydraulic components, particularly regarding the influence of thermal post-processing such as hot isostatic pressing (HIP). In this study, a dedicated hollow specimen geometry was developed to allow mounting on the pressure impulse test rig and to provide an analogue to an isolated channel section in a hydraulic manifold. Specimens with different wall thicknesses were then manufactured from AlSi10Mg by laser powder bed fusion (LPBF) and tested using a trapezoidal pressure profile. The fatigue performance was evaluated based on the number of pressure cycles sustained by the specimens. In addition to wall thickness, different building orientations were investigated. The influence of HIP on fatigue life under pressure impulse loading was examined. The study focuses on fluid power applications and uses the experimental results to derive design recommendations for the wall thickness of additively manufactured hydraulic components with and without post-processing. Furthermore, a material characterization approach for hydraulic components is proposed to support simulation-based lifetime assessment.
| Speaker Country | Germany |
|---|---|
| Would you like to publish your paper in the special issue of BHM "Berg- und Hüttenmännische Monatshefte" | No |