Preparation and Mechanical Properties of High Strength Zr-Based Bulk Metallic Glasses Containing High Content of Cu

Ti-based bulk metallic glasses with minor addition of Ag, Au or Pt elements were prepared by copper mold casting. The Microstructure of the as-cast samples was examined by TEM. Nanoparticles identified as cubic Pd3Ti with crystal planes of (111), (200), (220) and (311) are observed in all the alloys modified by the minor addition of Ag, Au or Pt. The results revealed that the glassy/nanoparticle composited alloys exhibited high strength about 2000 MPa and plastic strain between 1.5-10% due to the inhibition of propagation of shear band.

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Ductile Zr-Based Bulk Metallic Glasses by Controlling Heterogeneous Microstructure from Phase Competition Strategy

Nanomaterials ◽

10.3390/nano9121728 ◽

2019 ◽

Vol 9 (12) ◽

pp. 1728 ◽

Cited By ~ 1

Author(s):

J. L. Cheng ◽

J. J. Wang ◽

J. X. Rui ◽

Y. L. Yun ◽

W. Zhao ◽

...

Keyword(s):

Mechanical Properties ◽

Metallic Glasses ◽

Bulk Metallic Glasses ◽

High Strength ◽

Primary Phase ◽

Competition Strategy ◽

Compression Tests ◽

Phase Competition ◽

Superior Mechanical Properties ◽

New Perspective

In this paper, we prepare the alloys of Zr41.2Ti13.8Cu12.5Ni10Be22.5, Zr44.4Ti14.8Cu14.3Ni11.5Be15, and Zr38Ti12.7Cu9.6Ni7.7Be32 to show the effects of alloy composition on the inhomogeneity structures and mechanical properties of Zr-based bulk metallic glasses (BMGs). Compared with the best glass former Zr41.2Ti13.8Cu12.5Ni10Be22.5, some nanoscale inhomogeneity structures can be induced by shifting the compositions towards a primary phase in the alloys of Zr44.4Ti14.8Cu14.3Ni11.5Be15 and Zr38Ti12.7Cu9.6Ni7.7Be32. The room temperature compression tests reveal that theBMGs contained nanoscale inhomogeneity structures exhibit superior mechanical properties with the high strength of 1780 MPa and especially a remarkable plastic strain of over 9%. These findings provide a new perspective to enhance the ductility of BMGs by introducing nanoscale inhomogeneity structures based on the phase competition strategy.

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Formation and Mechanical Properties of Pd-Si Binary Bulk Metallic Glasses

Advances in Materials Science and Engineering ◽

10.1155/2014/647197 ◽

2014 ◽

Vol 2014 ◽

pp. 1-5

Author(s):

Na Chen ◽

Hongxia Zhang ◽

Ke-Fu Yao

Keyword(s):

Mechanical Properties ◽

Metallic Glasses ◽

Shear Bands ◽

Bulk Metallic Glasses ◽

High Strength ◽

Side Surface ◽

Alloy System ◽

Structural Inhomogeneity ◽

Micrometer Scale ◽

Scale Shear

Glassy spherical samples in the diameters up to 10 mm were produced in a binary Pd-Si alloy system. These Pd-Si bulk metallic glasses (BMGs) combine high strength of about 1600 MPa and superplasticity of over 70% together. In addition to abundant micrometer-scale shear bands, 10–20 nanometer-sized shear bands were also observed on the side surface of the deformed sample. The excellent ductility shown by the Pd-Si BMGs is suggested to arise from the nanoscale structural inhomogeneity.

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