Effect of Crystallization on High-Temperature Plastic Flow and Ductility in Pre-Annealed Zr-Al-Ni-Cu Bulk Metallic Glass

Yorinobu Takigawa; J. Kobata; Hiroshi Tsuda; Kenji Higashi

doi:10.4028/www.scientific.net/MSF.558-559.1449

Paper Titles

The Role of α/γ Orientation Relationships during Ferrite Nucleation in an Fe-Cr-Ni Alloy
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Preparation and Characteristics of Monodispersed MFe₂O₄ Nanoparticles for Applications in Biomedicine
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Crystallographic Texture in Low Alloy TRIP Steel
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Microstructure - Texture Related Toughness Anisotropy of API-X80 Pipeline Steel Characterized by Means of 3D-EBSD Technique
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Microstructure Evolution during Tempering of Martensite in a Medium-C Steel
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Texture and Microstructure Control of Al-Mg-Si Alloy Sheet by Differential Speed Rolling
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Effect of Crystallization on High-Temperature Plastic Flow and Ductility in Pre-Annealed Zr-Al-Ni-Cu Bulk Metallic Glass
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Distribution of the Precipitates on the Grain Boundaries in Fe-3%Si Steel during Secondary Recrystallization Annealing
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Microstructures of Microwave Heated Soda-Lime Glass - Fe Composite and Ni-Zr-Nb-Ti-Pt Metallic Glass
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HomeMaterials Science ForumMaterials Science Forum Vols. 558-559Effect of Crystallization on High-Temperature...

Effect of Crystallization on High-Temperature Plastic Flow and Ductility in Pre-Annealed Zr-Al-Ni-Cu Bulk Metallic Glass

Abstract:

High-temperature plastic flow and tensile ductility in pre-annealed Zr65Al10Ni10Cu15 bulk metallic glass are examined in a supercooled liquid region. The specimen annealed at 673K for 1.8ks before the tensile test exhibits uniform deformation, and large elongation of 1100% is obtained in the tensile test at 673K and in a constant true strain rate of 1×10-2s-1. In the specimen, initial stress decreases in comparison with that of the specimen without annealing, but apparent strain hardening arise during deformation. SEM analysis after the deformation reveals that the cavitation is very limited even at the fracture tip. XRD and TEM analyses reveal that icosahedral phase is observed only in gage section but not in grip section after the deformation. The limited cavitation due to the accommodation of stress concentration through the grain boundary amorphous phase possibly makes a positive contribution to the large elongation in the annealed specimen, as well as the neck stability due to the strain hardening by the interaction between the icosahedral phase particles increasingly crystallized by the local strain.