Effects of Zr Content on the Microstructures and Tensile Properties of Ti-3Al-8V-6Cr-4Mo-xZr Alloys

被引：7

作者：

Ba, Hong-Bo ^{[1
,2
]}

Dong, Li-Min ^{[1
]}

Zhang, Zhi-Qiang ^{[1
]}

Xu, Dong-Sheng ^{[1
]}

Yang, Rui ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

[2] Liaoning Univ Technol, Sch Mat Sci & Engn, Jinzhou 121001, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2016年 / 29卷 / 08期

关键词：

Titanium alloy; Microstructure; Silicide; Grain size; Tensile properties; STRENGTH TITANIUM-ALLOY; MECHANICAL-PROPERTIES; AEROSPACE INDUSTRY; HEAT-TREATMENT; BETA; PRECIPITATION; SILICIDES; EVOLUTION;

D O I：

10.1007/s40195-016-0443-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The microstructural evolution and tensile properties of Ti-3Al-8V-6Cr-4Mo-xZr (x = 0, 2, 4 and 6) titanium alloys were investigated. The precipitated phases and tensile fracture morphologies were observed using scanning electron microscopy and transmission electron microscopy. Experimental results show that the presence of trace impurity Si and the addition of Zr induce the formation of (TiZr)(6)Si-3 silicides. The quantity of silicides increases with Zr content increasing. The dispersed silicides refined the grain size of beta Zr-containing alloys, and the grain size decreases significantly with Zr content increasing. Accompanying these microstructural changes, the strength of the alloys is enhanced gradually with the increase of Zr content, which is attributed to the combination of precipitation strengthening and grain refinement.

引用

页码：722 / 726

页数：5

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