Effect of Y Addition on the Microstructure and Mechanical Properties of the As-cast Ti-6A1-4V Alloy

被引：0

作者：

Wang Liqing ^{[1
]}

Xiao Bang ^{[1
,2
]}

Zhao Shaoyang ^{[1
]}

Tan Ping ^{[1
]}

Li Zengfeng ^{[1
]}

Yin Jing'ou ^{[1
]}

Shen Lei ^{[1
]}

Wang Jianzhong ^{[1
]}

Tang Huiping ^{[1
]}

机构：

[1] Northwest Inst Nonferrous Met Res, State Key Lab Porous Met Mat, Xian 710016, Peoples R China

[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2020年 / 49卷 / 12期

关键词：

Ti-6A1-4V-0.3Y alloys; Y2O3; particles; alpha/beta lamellar structure; mechanical properties; fracture behavior; TI-6AL-4V; TI; DUCTILITY; BORON;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of yttrium (Y) addition on microstructures and properties of the as-cast Ti-6A1-4V alloys were studied. The microstructure and mechanical properties were characterized by optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and tensile testing. The results show that Ti-6A1-4V alloy exhibits typical Widmanstatten structure. With Y addition, Y2O3 particles form and primarily distribute along the prior-beta grain boundaries, and it induces the formation of special paralleled alpha/beta lamellas on either side of the prior-beta grain boundaries. While alternate alpha/beta lamellas are observed inside the grains of Ti-6A1-4V-0.3Y alloys. Compared with Ti-6A1-4V, the Y addition improves the strength slightly. Both the paralleled alpha/beta lamellas and Y2O3 cause the transformation from cleavage fracture to intergranular fracture and the significant decrease in elongation. Therefore, the variation of the microstructure of Ti matrix caused by Y2O3 also plays an important role in the ductility of the alloys.

引用

页码：4142 / 4145

页数：4

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