Yang Z, Herrnböck L, Markl M, Mergheim J, Steinmann P, Körner C (2025)
Publication Type: Book chapter / Article in edited volumes
Publication year: 2025
Publisher: Springer Nature
Edited Volumes: Progress in Powder Based Additive Manufacturing
Series: Springer Tracts in Additive Manufacturing
Book Volume: Part F386
Pages Range: 309-330
DOI: 10.1007/978-3-031-78350-0_15
The conventional process development for powder bed fusion (PBF) processes targets the manufacturing of defect-free parts, e.g., with low porosity, no layer binding faults and cracks, or high dimensional accuracy. These topics are addressed for laser powder bed fusion (PBF-LB/M) in Chap. 8 and electron beam powder bed fusion (PBF-EB) in Chap. 7 for different alloys. However, although a part is defect-free, the microstructure and consequently the mechanical properties vary locally in complex geometries manufactured with standard process strategies. The microstructure is mainly influenced by the local solidification conditions during manufacturing. Epitaxial crystal growth occurs in combination with a natural grain selection along the whole part due to different crystal growth rates depending on the local transient temperature field and the crystal orientation. Depending on the PBF process and the manufacturing conditions, nucleation plays an important role during microstructure formation regarding the grain size and orientation and there are two different strategies to circumvent or benefit from these effects. In the first strategy, the processing conditions are modified in such a way that the solidification conditions are almost equal regardless of the part geometry (see Chap. 7). The second strategy is to tailor the local solidification conditions to achieve a beneficial local microstructure, e.g., to exploit a material anisotropy to ensure the orientation with the highest stiffness in the part-loading direction. Both strategies are costly and time-consuming regarding pure experimental development.
APA:
Yang, Z., Herrnböck, L., Markl, M., Mergheim, J., Steinmann, P., & Körner, C. (2025). Mesoscopic Modeling and Simulation of Properties of Additively Manufactured Metallic Parts. In Dietmar Drummer, Michael Schmidt (Eds.), Progress in Powder Based Additive Manufacturing. (pp. 309-330). Springer Nature.
MLA:
Yang, Zerong, et al. "Mesoscopic Modeling and Simulation of Properties of Additively Manufactured Metallic Parts." Progress in Powder Based Additive Manufacturing. Ed. Dietmar Drummer, Michael Schmidt, Springer Nature, 2025. 309-330.
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