|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||Effect of Composition on Mechanical Rejuvenation by HPT Deformation in Zr-Cu-Al-Ni Metallic Glass
||Koichi Tsuchiya, Jiang Qiang, Seiichiro II, Shinji Kohara, Koji Ohara, Osami Sakata, Karin Dahmen, Peter K. Liaw
|On-Site Speaker (Planned)
Our previous study revealed that high-pressure torsion (HPT) deformation of Zr50Cu40Al10 metallic glass resulted in anomalous decrease in nano-hardeness and elastic modulus accompanied by an increase in free volume. This can be explained by structural rejuvenation caused by an imposed large shear strain during HPT. In the present study, metallic glass with the compositions of Zr55Cu30Ni5Al10 and Zr65Cu18Ni7Al10 were subjected to HPT deformation. Mechanical and thermal behaviors were investigated by nanoindentation and differential scanning calorimetry (DSC). The reductions in nano-hardness and elastic modulus were less pronounced in Zr65 samples than in Zr50Cu40Al10 and in Zr55Cu30Ni5Al10. Relaxation enthalpy measurements by DSC and preliminary X-ray pair distribution function (PDF) measurements suggested the similar tendency.
||Planned: A print-only volume