Brief presentation for Dislocation Theory MME Dept IIT Kharagpur

1. ZIRCONIUM BASED BULK METALLIC
GLASS-TUNGSTEN FIBRE COMPOSITE
By
09MT3018-Piyush Verma
09MT3010-Nitin Singh
Department of Metallurgical and Materials Engineering
IIT Kharagpur

2. Reference:

3. Stress-Strain Curve

4.  Tungsten fiber volume fraction:31 % (1.38 diameter)
Sample length: 30 mm
Mold cavity ( 6mm diameter, 55 mm length ).
 Glass-Alloy:
 Why Tungsten? : It increases Toughness (Tungsten has highest Tensile
strength among pure metal)
 Compressive Fracture stress of BMG Composite (1783 Mpa) found to
be slightly lesser than the Fracture stress of BMG (1904 Mpa).
 Fracture Strain of BMG Composite (0.06) is 10 times of BMG (0.558).
 Deformation occurs, as in glass by the propagation of localized shear
bands (at an angle of 45 to the compressive axis). But the interaction of
shear bands with the W wires results in the generation of multiple shear
bands in the Tungsten and substantial plastic deformation.
 Greatly desired in the design of W- based armor piercing kinetic energy
penetrators

6. Thank You….