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Metal Science and Metallography
ArticleName Study of impact strength of C-Mn-Si composition metal after wire-arc additive manufacturing (WAAM)
DOI 10.17580/cisisr.2022.02.10
ArticleAuthor A. E. Balanovskiy, N. A. Astafyeva, V. V. Kondratyev, Yu. I. Karlina

Irkutsk National Research Technical University (Irkutsk, Russia):

A. E. Balanovskiy, Cand. Eng., Associate Prof.
N. A. Astafyeva, Cand. Eng., Cand. Eng., Associate Prof.


A. P. Vinogradov Institute of Geochemistry of the Siberian Branch of the Russian Academy of Sciences (Irkutsk, Russia):
V. V. Kondratyev, Cand. Eng., Senior Scientific Researcher


Moscow State University of Civil Engineering (Moscow, Russia):
Yu. I. Karlina, Cand. Eng., Scientific Researcher, e-mail:


The results of study of impact strength of C-Mn-Si composition metal after wire-arc additive manufacturing (WAAM) are presented. It was established that destruction of the samples of such composition at the temperatures below tough-brittle transition occurs both via tough and brittle mechanisms. The samples manufactured in the direction along built-up welding are characterized by essentially lower impact strength comparing with those manufactured in vertical direction of samples cutting. Impact strength of the samples made of 09G2SA standard steel is substantially lower than for C-Mn-Si composition metal which was obtained via additive technology. Fractographic analysis of fractures for C-Mn-Si compositions manufactured via additive technology using carbon dioxide and gas mixture displays tough pit destruction type. The samples with high impact strength are characterized by forming of cleavage facets after tough crack propagation to the sample middle, what is accompanied by significant widening opposite to a notch and narrowing under a notch. The samples with low impact strength are characterized by forming of brittle fracture directly under a notch without essential sample plastic deformation. It is shown that built-up welding with partial or complete recrystallization of rolls is required for forming of cold-resistant metal structure. In this case, order of rolls location, heat input and parameters of welding conditions make the direct effect on shape, geometrical dimensions, fusion penetration and number of rolls, as well as on size and morphology of the structural components, percent relation between cast and recrystallized microstructure of seam metal. The complex of these factors finally determines structural state and cold resistance of seam metal.

The materials for this publication were prepared using the results of investigations, which were conducted within the framework of the program of activity of "Baikal" interregional educational center of global level, according to the priority direction "Processing of industrial wastes", with use of equipment of the Shared knowledge center of isotope and geochemical researches of the Institute of Geochemistry of RAS Siberian branch.

keywords Wire-arc additive manufacturing (WAAM), metal 3D printing technologies, low-carbon steel, structure, hardness, mechanical properties, impact strength

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