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Features of precipitation of hardening phase in the nickel-cobalt alloy, alloyed with tantalumстатья Тезисы
- Авторы: Shaipov R.Kh, Kerimov E.Yu, Slyusarenko E.M.
- Сборник: Proceedings of the 3rd International Symposium "Nanomaterials and the Environment"
- Год издания: 2016
- Место издания: Moscow
- Первая страница: 47
- Последняя страница: 47
- Аннотация: One of the promising ways of development of new nickel-cobalt alloys is a combination of solid-solution hardening that is provided alloying the alloys by the transition metals of V-VI groups, with their hardening by matrix coherent dispersed precipitates of intermetallic phases formed during decomposition of supersaturated solid solutions. For the development of this area, first of all, it is necessary to investigate the processes of dispersion hardening alloys of ternary Co-Ni-Me systems, since Ni3Me phase has been successfully used for hardening nickel based superalloys. One such system is a three-component Co-Ni-Ta system. The (Co,Ni)3Ta phase (structural type BaPb3) is precipitated in the form of elongated structures with lateral dimension of 70 to 100 nm after annealing at 1200 K and of 50 to 70 nm after annealing at 973 K. Precipitated at 1200 K the structures increases to 100 – 150 nm after annealing at 973 K. Increasing the number of phase precipitates and decrease lateral dimension of the phase with decreasing heat treatment temperature is correlated with increasing hardness of the alloy, measured on Vickers hardness, which was 273,3 HV0,1, 399,4 HV0,1 and 432,6 HV0,1 after annealing at 1375 K 1200 K and 973 K respectively. Cold hardness of the synthesized alloy is correspond to cold hardness of the casting cobalt alloys (stellite).
- Добавил в систему: Керимов Эльшат Юсифович