Cryogenic rejuvenation of Al-based amorphous-nanocrystalline alloys

Effect of cryogenic treatment on amorphous phase rejuvenation in Al-based alloys was studied by X-ray diffraction and transmission electron microscopy. It was shown that cryogenic cycling of partially crystalline samples of Al88Ni6Y6 and Al87Ni8Gd5 alloys leads to a decrease in a nanocrystalline phase fraction. After cryogenic cycling of partially crystalline Al88Ni6Y6 alloy the amount of the nanocrystalline phase reduces with no signs of the crystalline phase being observed after 100 treatment cycles in the temperature range of 77-293 K. (C) 2019 Elsevier B.V. All rights reserved.