Signatures of the unique microstructure of additively manufactured steel observed via diffraction

A series of measurements were designed to gain confidence in the interpretation of the peak breadth in diffraction patterns collected from additively manufactured material, which has a novel microstructure in comparison to the well understood microstructure of wrought materials. Stainless steels mad...

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Bibliographic Details
Published in:Scripta materialia 2018-10, Vol.155 (C), p.16-20
Main Authors: Pokharel, R., Balogh, L., Brown, D.W., Clausen, B., Gray, G.T., Livescu, V., Vogel, S.C., Takajo, S.
Format: Article
Language:English
Subjects:
304 L stainless-steel
Additive manufacturing
Dislocations
Microstructure
Neutron diffraction
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Summary:A series of measurements were designed to gain confidence in the interpretation of the peak breadth in diffraction patterns collected from additively manufactured material, which has a novel microstructure in comparison to the well understood microstructure of wrought materials. Stainless steels made with two additive manufacturing techniques were compared to wrought material. Similar patterns observed in the scattering vector dependence for additively manufactured and deformed wrought materials suggested that the broadening in both materials was related to dislocations. This was confirmed by heat-treatment, during which both materials exhibited recovery due to the annealing of dislocations at the same temperature. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2018.06.008