Stress-Strain curve for a ex-situ prepared Zr based metallic glass composite
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This document summarizes research on a zirconium-based bulk metallic glass composite reinforced with tungsten fibers. The composite was created with 31% tungsten fiber volume fraction. Testing showed the composite had a slightly lower compressive fracture stress than the unreinforced bulk metallic glass but its fracture strain was over 10 times higher. This is because the tungsten wires interact with shear bands in the glass, generating multiple shear bands in the tungsten and allowing for substantial plastic deformation. The increased toughness makes these composites promising for applications requiring energy absorption like armor.
Stress-Strain curve for a ex-situ prepared Zr based metallic glass composite
- 1. ZIRCONIUM BASED BULK METALLIC GLASS-TUNGSTEN FIBRE COMPOSITE By 09MT3018-Piyush Verma 09MT3010-Nitin Singh Department of Metallurgical and Materials Engineering IIT Kharagpur
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- 4. ï‚— Tungsten fiber volume fraction:31 % (1.38 diameter) Sample length: 30 mm Mold cavity ( 6mm diameter, 55 mm length ). ï‚— Glass-Alloy: ï‚— Why Tungsten? : It increases Toughness (Tungsten has highest Tensile strength among pure metal) ï‚— Compressive Fracture stress of BMG Composite (1783 Mpa) found to be slightly lesser than the Fracture stress of BMG (1904 Mpa). ï‚— Fracture Strain of BMG Composite (0.06) is 10 times of BMG (0.558). ï‚— 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. ï‚— Greatly desired in the design of W- based armor piercing kinetic energy penetrators