Effects of Trace Si Addition on the Microstructures and Tensile Properties of Ti-3Al-8V-6Cr-4Mo-4Zr Alloy

Metals

卷:7

Zhiqiang Zhang¹  Xiaofei Lei¹  Limin Dong¹  Hongbo Ba¹ 

[1] Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;

关键词: titanium alloy;    microstructure;    silicide;    tensile properties;   

DOI  :  10.3390/met7080286

来源: DOAJ

【 摘 要 】

The microstructural evolution and tensile properties of Ti-3Al-8V-6Cr-4Mo-4Zr titanium alloys with various Si contents were investigated. The results revealed that the addition of trace Si and the presence of Zr induced the formation of (TiZr)6Si3 silicides, in the size range from 100 nm to 300 nm. The fine silicide precipitates refined β grains. The tensile strength increased about 40 MPa due to precipitation strengthening and grain refinement, and the ductility of the two alloys was similar. The tensile fracture mode of the alloys was dimple ductile fracture.

【 授权许可】

Unknown