M. Hietala, T. Rautio, J. Mäkikangas, M. Jaskari, M. Keskitalo and A. Järvenpää, "Static Properties and Fatigue Strength of Wire Arc Additive Manufactured 316L," 2022 7th National Scientific Conference on Applying New Technology in Green Buildings (ATiGB), Da Nang, Vietnam, 2022, pp. 1-5, doi: 10.1109/ATiGB56486.2022.9984075.
Static properties and fatigue strength of wire arc additive manufactured 316L
|Author:||Hietala, Mikko1; Rautio, Timo1; Mäkikangas, Jarmo1;|
1Future Manufacturing Technologies, University of Oulu, Nivala, Finland
|Online Access:||PDF Full Text (PDF, 0.6 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2023041837255
Institute of Electrical and Electronics Engineers,
|Publish Date:|| 2023-04-18
The use of direct energy deposition (DED) has become much more common recently and in the future the DED technology will be used even more widely. Wire arc additive manufacturing (WAAM) technology has become much more widespread because it can be done cost-effectively with normal cold metal transfer (CMT) welding equipment. There is still a lack of information on the fatigue strength of parts made with different welding wires. This paper focuses on the mechanical properties of AISI 316L WAAM printed parts as well as bending fatigue strength. The average microhardness values were measured along the build direction. The optical microscope and EBSD detector were used to investigate the microstructure. The tensile strength and bending fatigue strength of the WAAM printed 316L were evaluated. The EBSD investigation revealed that due to high heat input of the WAAM process, the remelting of each consecutive deposited layer caused epitaxial grain growth in the structure, leading to coarse columnar grain structure. There were no visible pores in the microstructure of the WAAM 316L. The hardness of the WAAM 316L was homogenous in the build direction. Based on tensile strength tests, the strength in the deposition direction was greater than in the build direction which is explained by the anisotropy generated in the deposition. The results revealed that the fatigue limit of the WAAM 316L is comparable to that of 316L sheet metal. The fatigue strength of the WAAM 316L was significantly higher in the high cycle fatigue regime compared to the fatigue strength of the powder bed fusion (PBF-LB) printed 316L.
|Pages:||1 - 5|
2022 7th National Scientific Conference on Applying New Technology in Green Buildings (ATiGB)
National Scientific Conference on Applying New Technology in Green Buildings
|Type of Publication:||
A4 Article in conference proceedings
|Field of Science:||
216 Materials engineering
214 Mechanical engineering
The authors would like to acknowledge the financial support received from the Council of Oulu Region and the European Union (European Regional Development Fund) for the M3D project and Business Finland for the DREAMS project. The authors would like to acknowledge the financial support received from City of Nivala, Nivala industrial park Ltd, NIHAK Nivala-Haapajarvi region registered association.
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