New Class of Plastic Bulk Metallic Glass
Abstract
An intrinsic plastic Cu45Zr46Al7Ti2 bulk metallic glass (BMG) with high strength and superior compressive plastic strain of up to 32.5% was successfully fabricated by copper mold casting. The superior compressive plastic strain was attributed to a large amount of randomly distributed free volume induced by Ti minor alloying, which results in extensive shear band formation, branching, interaction and self-healing of minor cracks. The mechanism of plasticity presented here suggests that the creation of a large amount of free volume in BMGs by minor alloying or other methods might be a promising new way to enhance the plasticity of BMGs.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2008
- DOI:
- 10.1103/PhysRevLett.100.075501
- Bibcode:
- 2008PhRvL.100g5501C
- Keywords:
-
- 62.20.F-;
- 61.43.Dq;
- 81.05.Kf;
- 81.40.Lm;
- Deformation and plasticity;
- Amorphous semiconductors metals and alloys;
- Glasses;
- Deformation plasticity and creep