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2021 (English)In: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 205, article id 114190Article in journal (Refereed) Published
Abstract [en]
We report the effect of cell structures on the fatigue behavior of additively manufactured (AM) 316L stainless steel (316LSS). Compared with the cell-free samples, the fatigue process of fully cellular samples only consists of steady and overload stages, without an initial softening stage. Moreover, the fully cellular sample possesses higher strength, lower cyclic softening rate and longer lifetime. Microscopic analyses show no difference in grain orientations, dimensions, and shapes. However, the fully cellular samples show planar dislocation structures, whereas the cell-free samples display wavy dislocation structures. The existence of cell structures promotes the activation of planar slip, delays strain localization, and ultimately enhances the fatigue performance of AM 316LSS.
Place, publisher, year, edition, pages
Elsevier, 2021
Keywords
Additive manufacturing; 316L, stainless steel, Cellular structure, Cyclic response behavior, Deformation mechanism
National Category
Materials Engineering
Identifiers
urn:nbn:se:liu:diva-178237 (URN)10.1016/j.scriptamat.2021.114190 (DOI)000692550000002 ()2-s2.0-85112531684 (Scopus ID)
Note
Funding: Swedish Governmental Agency for Innovation Systems (Vinnova)Vinnova [2016-05175]; Science Foundation Ireland (SFI)Science Foundation Ireland [16/RC/3872]; European Regional Development FundEuropean Commission; I-Form industry partners; Ji Hua Laboratroy [X210141TL210]; Center for Additive Manufacturing-metal (CAM2)
2021-08-162021-08-162023-12-28Bibliographically approved