Низкотемпературная интенсивная пластическая деформация магния

In this paper, the microstructure and texture of pure magnesium after rolling at low temperatures have been investigated. Pre-deformed magnesium in the form of a plate with the thickness of 1 mm was rolled at room and cryogenic temperatures down to foils with 150 µm thickness. The true strain was ε ~1.9. Methods of X-ray diffraction, scanning electron microscopy with electron backscattering diffraction analyses (EBSD-analysis) and transmission electron microscopy have been used to investigate the structure and texture of the magnesium foils. In the initial state, the plate has a weakened basal texture and fine-grained structure. It was shown that the basal texture (0001) became stronger during rolling regardless of the deformation temperature. In all cases, the structure was heterogenic and consisted of large recrystallized grains with preferred basal orientation and smaller (sub)grains. However, it was noted that the room-temperature rolling led to an increase of the fraction of large grains, and lower deformation temperature prevents an active grain growth. The change of the number fraction of low-angle and high-angle boundaries could point on different lead mechanisms during deformation. At room-temperature rolling, there is the predominance of slip processes and dynamic recrystallization. As for at cryo-deformation, the twinning is more active and the dislocation slip could be suppressed for a while.

Microstructure of commercial sheet out of Ti-6Al-4V alloy after superplastic forming at 700°C

М.Р. Шагиев, M.A. Murzinova

Signs of the presence of an ordered phase in the Cu-5.9 at.% Pd alloy after its long-term annealing at a moderate temperature

О.С. Новикова, А.Е. Костина, Е.Г. Волкова, Ю.А. Саламатов, А.В. Глухов, А.Ю. Волков, В.В. Марченков, В.С. Гавико, Ю.М. Устюгов

The influence of radial shear rolling on the structure and properties of 58Ni-Cr-Mo-B-Al-Cu superalloy

А.А. Бикмухаметова, Э.В. Галиева, И.Ш. Валеев, Е.Ю. Классман, И.И. Мусабиров, В.А. Валитов

1. Государственное задание - (theme: Pressure no. АААА-А18-118020190104-3)
2. Российский фонд фундаментальных исследований - Проект №18-33-00474