The Paton Welding Journal, 2022, №07



2022 №07 (01)

DOI of Article 10.37434/tpwj2022.07.02

2022 №07 (03)

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The Paton Welding Journal, 2022, #7, 10-16 pages

Structure and properties of welded joints of Ni₃Al intermetallic

I.S. Gakh¹, B.O. Zaderyi¹, G.V. Zvyagintseva¹, I.V. Honcharova2, V.V. Kuprin², S.I. Chugunova²

¹E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: gakh@paton.kiev.ua
²Frantsevych Institute for Problems of Materials Science of the NAS of Ukraine. 3 Krzhyzhanovskyi Str., 03142, Kyiv, Ukraine. E-mail: irina@ipms.kiev.ua

Abstract
Welded samples of Ni3Al intermetallic – the main strengthening phase of high-temperature nickel alloys were taken as an example to defi ne the main problems arising in fusion welding of this class of materials. Features of weld formation, structural and phase changes, and mechanical properties of the welded joints are considered. Conditions of cracks initiation and methods to prevent them are determined. The infl uence of welding modes and heat treatment on the structure, strength and ductility characteristics was studied. Mechanical properties of welded joints in the temperature range of 20…1200 °С were assessed. Schemes and modes of welding and heat treatment are proposed, which allow preventing cracking and ensure equal strength of welded joints and base metal at improvement of their ductility. 10 Ref., 4 Tabl., 10 Fig.
Keywords: Ni3Al intermetallic, welded joints, structure, mechanical properties, crack resistance, welding and heat treatment modes

Received: 23.05.2022
Accepted: 15.09.2022

References

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Suggested Citation

I.S. Gakh, B.O. Zaderyi, G.V. Zvyagintseva, I.V. Honcharova, V.V. Kuprin, S.I. Chugunova (2022) Structure and properties of welded joints of Ni₃Al intermetallic. The Paton Welding J., 07, 10-16.

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