Y添加Ti 40Zr 25Cu 9Ni 8Be 18非晶合金的纳米晶化及力学性能

Translated title of the contribution: Nano-crystallization and Mechanical Properties of Y Addition Ti 40Zr 25Cu 9Ni 8Be 18 Amorphous Alloy

Z.T. Shan, B.W. Ruan, H.Z. Tao, Yuanzheng Yue

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Abstract

(Ti 40Zr 25Cu 9Ni 8Be 18) 100-xY x (x=0,1.0,1.5,2.0,3.0) alloy rods with 3mm in diameter were fabricated by copper mold casting method. The microstructures, nano-crystallization and mechanical properties of the alloys were investigated by X-ray diffractometry(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), differential scanning colorimetry(DSC) and uniaxial compressive test.The results show that with 1.0%(atom fraction, the same below) addition of Y, the alloy presents amorphous nature by X-ray examination, with 1.5% of Y addition, nano-crystallization of the amorphous alloy is induced. Crystalline phases with the size of 5-20nm can be observed distributed in the amorphous matrix by high resolution transmission electron microscopy. The alloy with 1.5% of Y addition presents the fracture strength of 1990MPa, at the plastic strain of 3% upon uniaxial compressive test. The number of shear bands is increased in the fracture surfaces of the alloys with Y addition. The interference of shear bands hinders inhomogeneous deformation, increases the fracture strength and plasticity of the alloy.

Original languageChinese
Publication date20 Jul 2018
Number of pages6
DOIs
Publication statusPublished - 20 Jul 2018

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