Effect of Shot Peening Conditions on the Fatigue Life of Additively Manufactured A357.0 Parts 05-13-02-0009
This also appears in
SAE International Journal of Materials and Manufacturing-V129-5EJ
Fatigue performance can be a critical attribute for the production of structural parts or components via additive manufacturing (AM). In comparison to the static tensile behavior of AM components, there is a lack of knowledge regarding the fatigue performance. The growing market demand for AM implies the need for more accurate fatigue investigations to account for dynamically loaded applications. A357.0 parts are processed by laser-based powder bed fusion (L-PBF) in order to evaluate the effect of surface finishing on fatigue behavior. The specimens are surface finished by shot peening using ϕ = 0.2 and ϕ = 0.4 mm steel particles and ϕ = 0.21-0.3 mm zirconia-based ceramic particles. The investigation proves that all the considered post-processing surface treatments increase the fatigue resistance of as-built parts, but the effect of peening with ϕ = 0.4 mm steel particles or with ceramic particles is more pronounced than that of peening with ϕ = 0.2 mm steel particles, although this treatment has the same Almen A value as the ceramic one. The surface morphology and the crack surface of the samples are also investigated.
Citation: Gatto, A., Sola, A., and Tognoli, E., "Effect of Shot Peening Conditions on the Fatigue Life of Additively Manufactured A357.0 Parts," SAE Int. J. Mater. Manf. 13(2):125-137, 2020, https://doi.org/10.4271/05-13-02-0009. Download Citation
Author(s):
Andrea Gatto, Antonella Sola, Emanuele Tognoli
Affiliated:
Università degli Studi di Modena e Reggio Emilia, Italy
Pages: 14
ISSN:
1946-3979
e-ISSN:
1946-3987
Related Topics:
Additive manufacturing
Finishing
Coatings, colorants, and finishes
Fatigue
Peening
Ceramics
Steel
Tensile strength
Production
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