Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1635597 | Transactions of Nonferrous Metals Society of China | 2016 | 9 Pages |
Abstract
The combined effects of isothermal annealing and pre-compression on the mechanical properties of Cu36Zr48Al8Ag8 bulk metallic glass (BMG) were investigated. The as-cast specimens were first annealed at 743 K for 10 min, and then pre-compressed under 800 MPa for 1, 3, 5 and 10 h, respectively. The results indicated that annealing resulted in the formation of nanocrystals with a diameter of ~10 nm in the amorphous matrix and a drastic decrease of the free volume, leading to complete loss of the plasticity of the BMG. Applying pre-compression under a stress of 800 MPa for a proper duration (5 h) resumed part of the lost free volume in the BMG matrix and therefore partially recovered the plasticity. A very long period of pre-compression (10 h) decreased the free volume again, which was caused by the excessive crystal growth.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Ji GU, Li-xin ZHANG, Yi-han WANG, Song NI, Sheng-feng GUO, Min SONG,