EuroSuperalloys 2022 - 4th European Symposium on Superalloys and their Applications
Lecture
19.09.2022 (CEST)
Influence of LPBF Build Direction on IN738LC Creep Behavior
SM

Dr.-Ing. Sandra Megahed

Technische Universität Darmstadt

Megahed, S. (Speaker)¹; Heinze, C.²; Kontermann, C.¹; Krämer, M.¹; Oechsner, M.¹; Udoh, A.³; Weihe, S.³
¹TU Darmstadt; ²Siemens Energy Global GmbH & Co. KG, Berlin; ³University of Stuttgart
Vorschau
16 Min. Untertitel (CC)

While Laser Powder Bed Fusion (LPBF) offers many advantages, such as increased design freedom, the microstructural anisotropy significantly affects mechanical short- and long-term properties. In this study, LPBF-IN738LC creep samples are manufactured in three build directions (90°-Build direction, 0°-Perpendicular and 45°-Diagonal). Creep tests are carried out at 750 °C and 850 °C with applied stresses up to 350 MPa. Unexpectedly the 45°-Diagonal creep curve does not lie inbetween the 0°-Perpendicular and 90°-Build Direction curve. This study discusses the correlation between microstructure and build direction and the effect on creep behavior.

Abstract

Abstract

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