中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 17 No. 1 January 2007 |
metallic glasses with high glass forming ability
SUN Jian-fei(孫劍飛)1, SHEN Qing-ke(沈慶克)2, SHEN Jun(沈 軍)1
（ 1. School of Materials Science and Engineering, Harbin Institute of Technology,
Harbin 150001, China;
2. Department of Mechanical Engineering, Aviation University of Air Force,
Changchun 130022, China）
Abstract: Bulk amorphous Cu52.5Ti30Zr11.5Ni6 and Cu53.1Ti31.4Zr9.5Ni6 alloys with a high glass forming ability can be quenched into single amorphous rods with a diameter of 5 mm, and exhibit a high fracture strength of 2 212 MPa and 2 184 MPa under compressive condition, respectively. The stress—strain curves show nearly 2% elastic strain limit, yet display no appreciable macroscopic plastic deformation prior to the catastrophic fracture due to highly localized shear bands. The present work shows clearly evidence of molten droplets besides well-developed vein patterns typical of bulk metallic glasses on the fracture surface, suggesting that localized melting induced by adiabatic heating may occur during the final failure event.
Key words: bulk metallic glass; glass forming ability; mechanical property; adiabatic heating
