Effects of Recrystallization and Partial Remelting and Semi-solid Isothermal Treatment on Microstructure and Mechanical Properties of Ti48Zr18V12Cu5Be17 Metallic Glasses Composites

Zhu Linhao; Guo Hongmin; Jin Hualan; Huang Xinhua; Yang Xiangjie

doi:10.15980/j.tzzz.2021.05.022

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Effects of Recrystallization and Partial Remelting and Semi-solid Isothermal Treatment on Microstructure and Mechanical Properties of Ti₄₈Zr₁₈V₁₂Cu₅Be₁₇ Metallic Glasses Composites
Vol. 41, Issue 5, Pages: 625-628(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.05.022

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Zhu Linhao, Guo Hongmin, Jin Hualan, et al. Effects of Recrystallization and Partial Remelting and Semi-solid Isothermal Treatment on Microstructure and Mechanical Properties of Ti₄₈Zr₁₈V₁₂Cu₅Be₁₇ Metallic Glasses Composites. [J]. Special Casting & Nonferrous Alloys 41(5):625-628(2021)
DOI：

Zhu Linhao, Guo Hongmin, Jin Hualan, et al. Effects of Recrystallization and Partial Remelting and Semi-solid Isothermal Treatment on Microstructure and Mechanical Properties of Ti₄₈Zr₁₈V₁₂Cu₅Be₁₇ Metallic Glasses Composites. [J]. Special Casting & Nonferrous Alloys 41(5):625-628(2021) DOI： 10.15980/j.tzzz.2021.05.022.

摘要

以Ti

非晶复合材料为基础

研究了半固态等温处理（SSIT）和再结晶重熔法（RAP）对材料组织和性能的影响。结果表明

SSIT和RAP处理后材料并没有发生相变

但是组织由铸态细小枝晶转变为半固态粗大条状晶和近球晶

RAP法处理后材料组织由于再结晶

相较于半固态更加细小和圆整。RAP材料塑性最佳（20.43%）

比SSIT提升了8.27%

抗压强度（1 829.45 MPa）和屈服强度（1 144.06 MPa）也高于半固态等温处理的。RAP材料断口可以观察到脉状纹络密度最大

3种材料还存在光滑区和熔滴。铸态材料剪切带容易穿透晶粒

半固态材料除了剪切带

晶粒内还存在大量滑移带

再结晶重熔材料非晶基体内剪切带传播受阻

多重剪切带萌生

晶粒内相互平行和交叉的滑移带表明晶粒能够吸收更多的能量

承受更大的塑性变形。

Abstract

Based on Ti

metallic glasses composite

the effects of semi-solid isothermal treatment（SSIT） and recrystallization and partial remelting（RAP） on the microstructure and properties of the amorphous composites were investigated. The results show that after SSIT and RAP

phase transformation is absent

however the microstructure is converted from small dendrites to coarse strip crystal and near-spherical crystal. Due to recrystallization

the microstructure of RAP is finer and rounder than that of SSIT. The RAP ed composites has the best plasticity（20.43%） which is 8.27% higher than that of SSIT and its compressive strength（1 829.45 MPa） and yield strength（1 144.06 MPa） are also higher. The fracture of RAP can be observed the maximum density of veins and smooth area and molten drop also exist in three kinds of materials. The shear bands of as-cast composited are easy to penetrate the grain. In addition to the shear band

there exsit a large number of slip bands in the grain of SSIT. The propagation of shear bands in the amorphous matrix of RAP is hindered and multiple shear bands are generated. The parallel and crossed slip bands in the grain indicate that the grain can absorb more energy and withstand greater plastic deformation.