Automatic Welding, 2022, №07



2022 №07 (01)

DOI of Article 10.37434/as2022.07.02

2022 №07 (03)

---

Avtomaticheskaya Svarka (Automatic Welding), #7, 2022, pp. 9-15

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 NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@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

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

References

1. Bazyleva, O.A., Arginbaeva, E.G., Turenko, E.Yu. (2013) High-temperature intermetallic alloys for GTE parts. Aviats. Materialy i Tekhnologii, 3, 26??31 [in Russian].
2. Verin, A.S. (1997) Intermetallic Ni3Al as the base of heat-resistant alloy. MiTOM, 5, 70–73 [in Russian].
3. Lomberg, B.S., Ovsenyan, S.V., Bakradze, M.M., Mazalov, I.S. (2012) High-temperature heat-resistant nickel alloys for parts of gas-turbine engines. Aviats. Materialy i Tekhnologii, 5, 52–57 [in Russian].
4. Kolobov, Yu.R., Kablov, E.N., Kozlov, E.V. et al. (2008) Structure and properties of intermetallic materials with nanophase strengthening. Moscow, MISIS [in Russian].
5. Shaposhnikov, N.A. (1951) Mechanical tests of metals. Moscow, Mashgiz [in Russian].
6. Gudtsov, N.T., Lozinsky, I.G. (1952) Study of ageing process of metals and alloys by hardness measurement in vacuum heating. Zh. Tekhnicheskoj Fiziki, 8(22), 12–49 [in Russian].
7. Massalski, T.B., Murray, J.L., Bennett, L.H., Baker, H. (1986) Binary alloy phase diagrams. Metals Park, Ohio. American Society for Metals, 1, 1002.
8. Milman, Yu.V., Chugunova, S.I., Goncharuk, V.A. et al. (2013) Structure and mechanical properties of rapid- quenched intermetallic Ni3Al. Elektronnaya Mikroskopiya i Prochnost Materialov, 19, 78–85 [in Russian].
9. Yushchenko, K.A., Makhnenko, V.I., Savchenko, V.S., Chervyakov, N.O. (2006) Investigation of thermal-deformation state of welded joints in stable austenitic steels and nickel alloys. IIW Doc. IX-2224-06, 10. https://doi.org/10.1007/BF03266600
10. Mordel, L., Chugunova, S., Grinkevych, K. et al. (2013) The mechanical and tribological properties of welding joint of the Ni3Al intermetallic. In: Proc. of the 4th Int. Conf. on High- MatTech (Kyiv, Ukraine, October 7–11.

---

Advertising in this issue:

---