In situ crystallization and enhanced mechanical properties of the Zr41.2Ti13.8Cu12.5Ni10Be22.5 alloy by cold rolling

Effect of prestraining on the deformation and fracture behavior of Zr44Ti11Cu9.8Ni10.2Be25

“…The HRTEM study of the as-cast Zr44 and differently prestrained BMG displayed similar features without any trace of crystalline fringes, which are usually typical features of the glassy phase, in striking contrast to the previous results for rolled samples that revealed nanocrystallization or phase separation upon deformation [7,9,11]. The selected area electron diffraction (SAED) patterns for both the bright (area 1) and dark regions (area 2) exhibit diffuse halo rings confirming the glassy nature in both the regions.…”

Nanocrystals in Metallic Glasses

“…Furthermore the nanocrystal density is higher for the lower indentation rate. Crystallization reactions were furthermore induced with intense cold rolling and folding of melt-spun amorphous ribbons Hebert et al, 2005;Park et al, 2005;Hebert and Perepezko, 2007). Similarly to the milling-and bending-induced crystallization reactions the size of the nanocrystals was limited to about 15-20 nm.…”

Abnormal devitrification behavior and mechanical response of cold-rolled Mg-rich Mg-Cu-Gd metallic glasses

“…For example, the presence of quenched-in-nuclei of alpha Al in an amorphous matrix can enhance local structural ordering in severe deformation environments, especially under compressive force [8], and minimize the size of precipitates after 1st crystallization behavior in the following heat treatment. However, other glass-forming systems such as Zr- [5,10], Fe- [8], Cu- [11] or Mg-based [12] MGs often show different responses to applied deformation. For example, some of them did not exhibit a consistent devitrification process after coldrolling, implying that the applied deformation on MGs does not necessarily exhibit a similar structural change at room temperature for all MGs.…”