НИТУ МИСИС, Москва, Россия

А. Г. Мочуговский, доцент, канд. техн. наук, эл. почта: mochugovskiy.ag@misis.ru
О. Трошкова, лаборант-исследователь
Н. Ю. Табачкова, доцент, канд. физ.-мат. наук
Э. Н. Занаева, доцент, канд. техн. наук
А. С. Просвиряков, старший научный сотрудник, канд. техн. наук
А. В. Михайловская, доцент, канд. техн. наук

Исследовано изменение фазового состава, параметров микроструктуры и механических свойств сплава системы Al – Ti при механическом легировании и последующем горячем прессовании. В процессе механического легирования Ti растворяется в Al, что сопровождается уменьшением периода решетки (Al) до 0,4042 ± 0,0001 нм. Твердость сплава достигает максимального значения 370 ± 20 HV, а размер частиц порошка минимального значения ~25 мкм после 50 ч размола. Горячее прессование при 450 ^оС механически легированного в течение 50 ч порошка обеспечило эффективную консолидацию. Прессование сопровождалось распадом пересыщенного твердого раствора на основе алюминия и формированием частиц фаз D022-Al3Ti- и Al5Ti2. Полученные образцы имеют наноразмерную структуру и обладают повышенной термической стабильностью до температуры 450 оС. Исследованный сплав обладает хорошим сочетанием прочности и пластичности: предел текучести на сжатие при комнатной температуре – 460 МПа, при 350 ^оС – 170 МПа, относительная деформация не менее 40 %.

Работа выполнена при финансовой поддержке Российского научного фонда, грант № 24-79-00092 (https://rscf.ru/project/24-79-00092/).

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