Effect of Nb content on the microstructure and mechanical properties of Zr–Cu–Ni–Al–Nb glass forming alloys

Effect of Nb content on the microstructures and mechanical properties of Zr–Ti–Cu–Be–Nb glass-forming alloys

“…It is difficult to synthesize BMG matrix composites reinforced only with b-phase simply by modifying the original BMG composition. Modification of the BMG composition by addition of Nb may induce the formation of the b-phase together with other quasicrystals or intermetallic compounds, which can not be detected by XRD analysis for its limited volume fraction, and may deteriorate the mechanical properties due to its intrinsic brittleness [13].…”

“…The addition of Nb induces the precipitation of a b-phase solid solution with a dendritic morphology at the early stage of solidification of the alloys, which significantly changes the thermodynamics behavior and improves the plasticity of the composites [13,14]. In the present study, Zr 35 Ti 30 Be 27.5 Cu 7.5 BMG was chosen as the basic composition, which has a high glass forming ability (GFA), and could be synthesized with a diameter of at least 15 mm for a rod-like shape by the copper-mould suction casting [15].…”

Formation of Ti–Zr–Ni–Cu–Be–Nb bulk metallic glasses

“…The XRD patterns of (Ti 40 Zr 25 Ni 8 Cu 9 Be 18 ) 100−x Nb x (x = 0, 3,5,8,10) alloys are shown in Fig. 1.…”

“…The refractory metals, Mo, Ta and Nb, are known for inducing the precipitation of a ␤-phase solid solution with dendritic morphology at the early stage of solidification in Ti-or Zr-based alloys with a plasticity improvement of the metallic glasses [1][2][3][4][5][6][7][8][9][10][11][12]. For instance, Hays et al developed Zr-Ti-Nb-Cu-Ni-Be BMG composites by coupling a highstrength glassy phase with ductile dendritic bcc ␤-Ti phase, which significantly improves the deformation behavior of the composites and displays a plastic strain of 6-7% [1,2].…”

Effect of rolling on the microstructure and mechanical property of Zr52.5Cu17.9Ni14.6Al10Ti5 bulk metallic glass

“…Behaviors of BMGs under the action of stress therefore are widely studied recently [2][3][4][5][6][7][8][9][10][11]. While it is known that the plastic deformation of metallic glasses is homogeneous at low stress and high temperature, but inhomogeneous at high stress and low temperature [4], deformation induced phase transformations such as nanocrystallization [5][6][7] and phase separation [8] have been revealed in some metallic glasses.…”