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ANALYSIS ON THE EFFECTS OF THE ADDITIVELY MANUFACTURED ...

... SURFACE ON THE FATIGUE LIFE OF ALSI10MG, CONSIDERING THE DEFECT TOLERANCE

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Abstract:

The fatigue strength of parts manufactured via Laser Beam Melting (LBM) is reduced significantly by the process-induced surface area. To analyse this in more detail, specimens made of AlSi10Mg were manufactured with different process parameters, whereby two surface conditions, i.e., “as-built” and machined, were investigated. The results show a reduced fatigue strengths of the "as built" conditions, which is assumed to be caused by higher process-induced tensile residual stresses, while the notch effect due to the topography of the “as-built” surface conditions was less pronounced. Furthermore, precipitation hardening (T6) led to a significantly higher lifetime due to an increased defect tolerance. This underlines the importance of the defect tolerance for the fatigue strength of additively manufactured components.

Reference
ADD-2022-006

Title
ANALYSIS ON THE EFFECTS OF THE ADDITIVELY MANUFACTURED SURFACE ON THE FATIGUE LIFE OF ALSI10MG, CONSIDERING THE DEFECT TOLERANCE
Author(s)
P. Lehner, M. Ley, A. Al-Zuhairi, B. Blinn, R. Teutsch, T. Beck
DOI
10.48447/ADD-2022-006
Year of publication
2022
Publication type
conference paper (PDF)
Language
German
Keywords
Laser Beam Melting (LBM), defect tolerance, fatigue behaviour, defects, “as-built” surface