Author/Authors :
Wang، نويسنده , , G. and Shen، نويسنده , , J. and Sun، نويسنده , , J.F. and Huang، نويسنده , , Y.J. and Zou، نويسنده , , J. and Lu، نويسنده , , Z.P. and Stachurski، نويسنده , , Z.H. and Zhou، نويسنده , , B.D.، نويسنده ,
Abstract :
The superplastic deformation behavior and superplastic forming ability of the Zr41.25Ti13.75Ni10Cu12.5Be22.5 (at.%) bulk metallic glass (BMG) in the supercooled liquid region were investigated. The isothermal tensile results indicate that the BMG exhibits a Newtonian behavior at low strain rates but a non-Newtonian behavior at high-strain rates in the initial deformation stage. The maximum elongation reaches as high as 1624% at 656 K, and nanocrystallization was found to occur during the deformation process. Based on the analysis on tensile deformation, a gear-like micropart is successfully die-forged via a superplastic forging process, demonstrating that the BMG has excellent workability in the supercooled liquid region.
