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Structure of a 3D frame-bridge NiTi sample deposited on a low carbon steel substrate by wire arc additive manufacturing. / Resnina, N.N.; Palani, I. A.; Liulchak, P.S.; Belyaev, S.P.; Mani Prabu, S.S.; Jayachandran, S.; Kalganov, V.D.
в: Letters on Materials, Том 10, № 4, 2020, стр. 496-500.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Structure of a 3D frame-bridge NiTi sample deposited on a low carbon steel substrate by wire arc additive manufacturing
AU - Resnina, N.N.
AU - Palani, I. A.
AU - Liulchak, P.S.
AU - Belyaev, S.P.
AU - Mani Prabu, S.S.
AU - Jayachandran, S.
AU - Kalganov, V.D.
N1 - Publisher Copyright: © 2020, Institute for Metals Superplasticity Problems of Russian Academy of Sciences. All rights reserved.
PY - 2020
Y1 - 2020
N2 - A 3D frame-bridge sample was produced by wire arc additive manufacturing (WAAM) on a low carbon steel substrate using the Ni 50.9 Ti 49.1 shape memory wire with a diameter of 1.2 mm. The sample consisted of a rectangular frame and three bridges. The structure and chemical composition were studied in different zones: the frame, the bridge or joint of the frame and the bridge using light and scanning electron microscopy with energy dispersive X-ray spectroscopy. It was shown that the structure of the frame and the bridge located far from the joint was close to the “walls” produced by WAAM: a columnar grain grew across the layers and the equiaxed grains appeared on the top of the layer. The structure of the joint between frame and bridge significantly differed from the “walls”: from the frame side, columnar grains were found across and alone the layers, whereas, from the bridge side the columnar gains were observed in the first layer only. The study of the chemical composition showed that the Fe and C elements diffused to the sample from the low carbon steel substrate. As a result, TiC precipitates appeared in all layers that led to the alloy hardening. Fe atoms penetrated to the NiTi phase that suppressed the martensitic transformation.
AB - A 3D frame-bridge sample was produced by wire arc additive manufacturing (WAAM) on a low carbon steel substrate using the Ni 50.9 Ti 49.1 shape memory wire with a diameter of 1.2 mm. The sample consisted of a rectangular frame and three bridges. The structure and chemical composition were studied in different zones: the frame, the bridge or joint of the frame and the bridge using light and scanning electron microscopy with energy dispersive X-ray spectroscopy. It was shown that the structure of the frame and the bridge located far from the joint was close to the “walls” produced by WAAM: a columnar grain grew across the layers and the equiaxed grains appeared on the top of the layer. The structure of the joint between frame and bridge significantly differed from the “walls”: from the frame side, columnar grains were found across and alone the layers, whereas, from the bridge side the columnar gains were observed in the first layer only. The study of the chemical composition showed that the Fe and C elements diffused to the sample from the low carbon steel substrate. As a result, TiC precipitates appeared in all layers that led to the alloy hardening. Fe atoms penetrated to the NiTi phase that suppressed the martensitic transformation.
KW - additive manufacturing
KW - NiTi shape memory alloys
KW - microstructure
KW - Wire arc additive manufacturing
KW - 3D STRUCTURE
KW - NiTi shape memory alloy
KW - 3D structure
KW - Additive manufacturing
KW - Microstructure
UR - https://www.elibrary.ru/item.asp?id=44296322
UR - https://lettersonmaterials.com/ru/Readers/Article.aspx?aid=32922
UR - http://www.scopus.com/inward/record.url?scp=85097397013&partnerID=8YFLogxK
U2 - 10.22226/2410-3535-2020-4-496-500
DO - 10.22226/2410-3535-2020-4-496-500
M3 - Article
VL - 10
SP - 496
EP - 500
JO - Letters on Materials
JF - Letters on Materials
SN - 2218-5046
IS - 4
ER -
ID: 71871939