Conference Proceedings and Journals
Permanent URI for this communityhttps://hdl.handle.net/2152/1
Browse
Browsing Conference Proceedings and Journals by Author "Abele, E."
Now showing 1 - 2 of 2
- Results Per Page
- Sort Options
Item Micro Laser Melting: Analyses of Current Potentials and Restrictions for the Additive Manufacturing of Micro Structures(University of Texas at Austin, 2014) Fischer, J.; Kniepkamp, M.; Abele, E.Although there is a significant requirement for complex micro parts, current metal processing additive manufacturing techniques are limited in achievable part accuracy and geometric resolution. Due to the recently developed process of Micro Laser Melting (MLM) new potentials in micro manufacturing are realizable. This paper gives an overview of the present potentials of MLM using 316L steel powder. While using powder material with a grain size of ≤ 5 µm this technique enables layer thicknesses from 5 to 7 µm. Due to the use of different exposure strategies and laser modes (pulsed and continuous radiation) high aspect ratios up to 260 could be realized with thin wall structures. Furthermore, the influence of laser mode and exposure sequence on the part density, surface quality and accuracy of lattice structures with a minimum wall thickness lower than 40 µm is analyzed.Item Selective Laser Melting of Porous Structures(University of Texas at Austin, 2011-08-17) Stoffregen, H.A.; Fischer, J.; Siedelhofer, C.; Abele, E.Within the Center of Smart Interfaces “Understanding and Designing Fluid Boundaries”, a German Excellence Initiative, the Institute of Production Management, Technology and Machine Tools examines the manufacturing of porous structures by using selective laser melting (SLM). In this paper two different strategies are presented in order to obtain porosity: One strategy is to manufacture geometrically defined lattice structures. SLM allows here complex geometries that cannot be manufactured by conventional technologies to be built. The second approach is to manufacture geometrically undefined porosity by a specific modification of exposure parameters. The SLM generated porous structures are investigated with respect to the heat and mass transfer. The research focus is to increase the efficiency of spraycooling effects and the manipulation of the Leidenfrost point.