The phase content of ZrCrNi and ZrMn 2 alloys with initial hexagonal MgZn 2 (С14) type of Laves phase structure after reactive milling in hydrogen was investigated by X-ray powder diffraction and energydispersive X-ray spectroscopy. Depending on the milling time, the structure of the ZrCrNi alloy, which now contains significant amounts of Fe, changes from MgZn 2 type to MgCu 2 and Th 6 Mn 23 type structure after heat treatment. Laves phases / Hydrogen / High-energy ball milling / X-ray powder diffraction / Crystal structure