Журналы →  Tsvetnye Metally →  2022 →  №10 →  Назад

Название Effect of beryllium on the morphology of initial ingots and the structural phase state of fast-quenched STEMET 1108 brazing alloy ribbons
DOI 10.17580/tsm.2022.10.09
Автор Bachurina D. M., Morokhov P. V., Rasskazov R. S., Sevryukov O. N., +Kalin B. A.
Информация об авторе

National Research Nuclear University MEPhI, Moscow, Russia:

D. M. Bachurina, Postgraduate Student, Engineer, e-mail: dmbachurina@mephi.ru
P. V. Morokhov, Lead Engineer, e-mail: morokhov@mail.ru
R. S. Rasskazov, Undergraduate Student, e-mail: rasskazov_20000@mail.ru
O. N. Sevryukov, Associate Professor, Candidate of Technical Sciences, e-mail: sevr54@mail.ru
+B. A. Kalin (1935–2021)


The STEMET 1108 grade (copper – tin – indium – nickel) of filler metal is currently used to braze bronze to tungsten plated with pure copper in divertors of the International Thermonuclear Experimental Reactor (or, ITER). Such filler metals are obtained as a result of rapid solidification of melt on a rapidly spinning copper wheel (melt spinning). When ingots are cast from which brazing ribbons are further produced, pores occur in them, through which indium evaporates. All this may affect the quality of the final product. The authors propose to alloy ingots with beryllium to stop the pore formation. This paper looks at the effect of beryllium on the quality of filler metal ingots and ribbons. The paper describes the results of a study that looked at the structural phase state of filler metals using electron microscopy and X-ray diffraction techniques, as well as a synchrotron radiation source. Both ingots and ribbons were found to have the same phase composition that consists of copper-based FCCsolid solutions and contains phosphide Cu3P. Beryllium containing ribbons are thinner than beryllium-free ribbons. In both cases, a dendritic structure is formed across the entire ribbon thickness. It is demonstrated that beryllium alloying in the range of 0.05 to 0.1 wt. % helps to significantly reduce the porosity of the initial ingots without compromising their structural phase state. In addition, it helps prevent the evaporation of indium. Hence, the difference in the structural phase state between beryllium alloyed and non-alloyed ribbons is insignificant and only concerns their dendritic structure, while there is no noticeable difference in their phase composition.

Ключевые слова ITER, divertor, filler metal, STEMET 1108, beryllium, brazing
Библиографический список

1. Lavernia E. J., Srivatsan T. S. The rapid solidification processing of materials: Science, principles, technology, advances, and applications. Journal of Materials Science. 2010. Vol. 45, No. 2. pp. 287–325.
2. Rabinkin A. Amorphous brazing foil at age of maturity. Proceedings of the 3rd International Brazing and Soldering Conference. 2006. Vol. 2006. pp. 148–156.
3. Kokabi D., Kaflou A. Phase transformation study during diffusion brazing of -TiAl intermetallic using amorphous Ni-based filler metals. Materials Science and Technology. 2020. Vol. 36, Iss. 15. pp. 1639–1647.
4. Jiang C. Y., Li X. G., Wan G. et al. Microstructure evolution and mechanical properties of TiAl/GH536 joints vacuum brazed with Ti – Zr – Cu – Ni filler metal. Intermetallics. 2022. Vol. 142. 107468.

5. Giniyatulin R. N., Mazur I. V., Gervash A. A., Guryeva T. M., Kuznetsov V. E. et al. Overview of manufacturing technologies under development in Russia for ITER plasma facing components. Fusion Engineering and Design. 2018. Vol. 136. pp. 527–533.
6. Suchkov A. N., Kalin B. A., Fedotov V. T., Sevryukov O. N., Ivannikov A. A. Brazing of heterogeneous materials of the ITER first wall and divertor. Brazing-2013. Collection of Materials of the International Scientific and Technical Conference. Toliatti, 2013. pp. 245, 246.
7. Anestiev L. A. An analysis of the dependence between the ribbon dimensions and the technological parameters for the planar flow casting method. Materials Science and Engineering A. 1991. Vol. 131, Iss. 1. pp. 115–121.
8. Ouyang G. et al. Effects of solidification cooling rates on microstructures and physical properties of Fe–6,5 % Si alloys. Acta Materialia. 2021. Vol. 205. 116575.
9. Piskarev P. Yu., Ogurskiy A. Yu., Gervash A. A., Mazul I. V. Preparation to certification of the process of vacuum induction brazing of ITER beryllium lining. Naukoemkie tekhnologii v mashinostroenii. 2018. Vol. 2018, No. 8. pp. 33–43.
10. Ivannikov A. A., Kalin B. A., Sevryukov O. N., Penyaz M. A. et al. Study of the Ni – Si – Be system as a base to create boron-free brazing filler metals. Science and Technology of Welding and Joining. 2017. Vol. 23, Iss. 3. pp. 187–197. DOI: 10.1080/13621718.2017.1361668.
11. Lee J. G. et al. Brazing of Ti using a Zr-based amorphous filler. Solid State Phenomena. 2008. Vol. 135. pp. 131–134.
12. Komarov M. A. Brazing of beryllium with aluminium brazing alloys. Welding International. 2017. Vol. 31, Iss. 10. pp. 779–783.
13. Gusikhin V. S., Ognyakov V. A., Andreeva L. P. A relationship between the filler metal surface quality and the properties of the joint: The case study of VPR7 filler metal. Advanced Automobile Materials and Technologies (SAMIT – 2019). Kursk, 2019. pp. 65–69.
14. Kalin B., Fedotov V., Sevryukov O., Plyuschev A., Mazur I. et al. Be – Cu joints based on amorphous alloy brazing for divertor and first wall application. Journal of Nuclear Materials. 1999. Vol. 271-272. pp. 410–414.
15. Srinivas M. et al. Effect of planar flow melt spinning parameters on ribbon formation in soft magnetic Fe68.5Si18.5B9Nb3Cu1 alloy. Metallurgical and Materials Transactions B. 2011. Vol. 42, Iss. 2. pp. 370–379.
16. Fedotov I., Suchkov A., Silva A., Dzhumaev P., Kozlov I. et al. Study of the microstructure and thermomechanical properties of Mo / graphite joint brazed with Ti – Zr – Nb – Be powder filler metal. Journal of Materials Science. 2021. Vol. 56, Iss. 19. pp. 11557–11568.
17. Chen S. et al. Mechanism to reduce the porosity during argon arc welding of aluminum alloys by changing the arc angle. Metals. 2020. Vol. 10, Iss. 9. 1121.
18. Theisen E. A., Weinstein S. J. An overview of planar flow casting of thin metallic glasses and its relation to slot coating of liquid films. Journal of Coatings Technology and Research. 2022. Vol. 19. pp. 49–60.
19. Yu A.-M. et al. The effect of the addition of In on the reaction and mechanical properties of Sn – 1.0 Ag – 0.5 Cu Solder Alloy. Metals and Materials International. 2007. Vol. 13, Iss. 6. pp. 517–520.
20. Gusakov S. V., Shepelevich V. G., Gusakova O. V. Microstructure and mechanical properties of Bi27In38Sn35 alloy foil produced by rapid solidification process. Inzhenerno-fizicheskiy zhurnal. 2021. Vol. 94, No. 2. pp. 550–555.
21. Sharma A., Zadorozhnyy V. Review of the recent development in metallic glass and its composites. Metals. 2021. Vol. 11, Iss. 12. 1933.
22. Öztürk S., Sunbul S. E., Icin K. Effects of melt spinning process parameters and wheel surface quality on production of 6060 aluminum alloy powders and ribbons. Transactions of Nonferrous Metals Society of China. 2020. Vol. 30, Iss. 5. pp. 1169–1182.

Language of full-text русский
Полный текст статьи Получить