Significant Mechanical Softening of an Al-Y-Ni-Co Metallic Glass on Cold and Hot Rolling

The Minerals, Metals & Materials Society. 2019. Vol. 71. No. 11. P. 4079–4085.

Аронин А. С., Zolotorevsky V. S., Bazlov A. I., Igrevskaya A. G., Abrosimova G. E., Louzguine-Luzgin D. V.

Deformation-induced crystallization behavior of the Al85Y8Ni5Co2 metallic glassy samples subjected to cold and hot rolling with 35% size reduction is studied in the present work. The formation of primary nanoscale α-Al particles is observed after rolling at 473 K, which is below the glass-transition and crystallization temperature. It is found that contrary to thermal crystallization on heating below the glass-transition temperature, no intermetallic compounds but only α-Al nanoparticles were formed during the deformation-induced crystallization. The behavior is discussed in connection with the excess volume generated upon deformation. Structural changes are studied by x-ray diffractometry and transmission electron microscopy. Variation in the Vickers microhardness is also detected.

Ключевые слова: nanocrystal, metallic glasses, crystallization