Two-stage rejuvenation and the correlation between rejuvenation behavior and the boson heat capacity peak of a bulk metallic glass

Impact of Severe Deformation by HPT at Room Temperature on the Relaxation of the Glassy and the Supercooled Liquid States of PdNiP

“…Here the observed structural enthalpy change displaying the rejuvenation in Tab. II is in good agreement with a former report 12 . Moreover, the shift in T g , here defined via the half-c p method 13 , is an indicator that the individual relaxation state is influenced by both defor-mation (∆T g = 5/6 K -see black and blue as well as red and purple curves in Fig.…”

X-ray photon correlation spectroscopy revealing the change of relaxation dynamics of a severely deformed Pd-based bulk metallic glass

“…Palladium-based MGs have an outstanding glass-forming ability and relatively good plasticity, and thus are particularly suitable for studying deformation and post-deformation properties of MGs [30][31][32][33][34]. To prepare Pd40Ni40P20 MGs, palladium plates and granular Ni2P were pre-melted and homogenized in a silica crucible by induction heating under a Ti-gettered argon atmosphere, and then the material was reheated in another silica crucible with a round nozzle and injected into a copper mold to obtain a rod of 5 mm in diameter for HPT deformation.…”

Enhancing ductility in bulk metallic glasses by straining during cooling

“…achieved through thermal treatments such as the use of different cooling rates 5,41 , annealing protocols 2,40,46,49 , or mechanical treatments such as quasistatic mechanical loading [16][17][18][19][20] , plastic deformation 29,30,50,51 , thermal cycling [25][26][27][28] , shot peening 22 , and radiation damage [11][12][13][14][15] . Whereas thermal treatments enable the liquid BMG former to be affected before it freezes into a glass, with mechanical treatments, the glass itself is manipulated.…”