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MM: Fachverband Metall- und Materialphysik
MM 53: Structural Materials (Steels, light-weight materials, high-temperature materials) - II
MM 53.4: Vortrag
Donnerstag, 19. März 2020, 12:30–12:45, BAR 205
Residual stresses in additively manufactured aluminum alloys — •Marc-André Nielsen1, Emad Maadwad1, Dieter Lott1, Peter Staron1, Sabine Bodner2, Gerald Resch3, Jozef Keckes2, and Martin Müller1 — 1Institute of Material Research, Helmholtz-Zentrum Geesthacht, Germany — 2Erich Schmid Institute, Montanuniversität Leoben, Austria — 3Resch GmbH, Glojach, Austria
Additive manufacturing opened up new ways to produce parts with high geometric complexity, e.g. involving internal structures, leading to an increased interest in science and industry in the recent years. The mechanical behavior and load-bearing capacity of additively manufactured components, however, is still not really understood and subject of intensive research efforts. In particular, residual stresses (RS) play an important role e.g. for strength and fatigue properties. Therefore, RS distributions were investigated in various parts, fabricated from aluminium alloy powder (AlSi10Mg) using the Selective Laser Melting (SLM) technique. The produced samples consist of simple walls with a wall thickness of about 3 mm and different geometries involving, e.g., different edge curvatures. Residual stress fields were determined using high-energy X-ray diffraction. The diffraction studies were carried out in transmission geometry using a photon energy of 87.1 keV. The high energy allows to penetrate thicker samples. The influence of specimen geometry and production parameters on the RS state will be discussed and the RS in the investigated aluminum alloy will be compared with RS in 316L steel.