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

SCRIPTA MATERIALIA

卷:155

Article

Pokharel, R.¹  Balogh, L.²  Brown, D. W.¹  Clausen, B.¹  Gray, G. T., III¹  Livescu, V.¹  Vogel, S. C.¹  Takajo, S.^1,3 

[1] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

[2] Queens Univ, Kingston, ON K7L 3N6, Canada

[3] JFE Steel Corp, Kurashiki, Okayama 712, Japan

关键词: Additive manufacturing;    304 L stainless-steel;    Microstructure;    Dislocations;    Neutron diffraction;   

DOI  :  10.1016/j.scriptamat.2018.06.008

来源: Elsevier

【 摘 要 】

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. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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