Microstructure and Tensile Properties of Forged High Nb Containing Tial Alloy on Large Scale

被引：0

作者：

Xu Xiangjun ^{[1
]}

Lin Junpin ^{[2
]}

Wang Yanli ^{[2
]}

机构：

[1] Zhongyuan Univ Technol, Mat & Chem Sch, Zhengzhou 450007, Peoples R China

[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

ADVANCED MATERIALS RESEARCH II, PTS 1 AND 2 | 2012年 / 463-464卷

关键词：

Titanium aluminides; Microstructure; Mechanical properties; Isothermal forging; MECHANICAL-PROPERTIES; HOT WORKABILITY; DEFORMATION;

D O I：

10.4028/www.scientific.net/AMR.463-464.102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructure and tensile properties of canned forged Ti-45Al-(8-9)Nb-(W,B,Y) (at.%) were investigated. After canned forging at (alpha + gamma) phase region, microstructure in the major part of the pancake was fully recrystallized duplex (DP) microstructure containing equiaxed gamma grains and fine alpha(2)/gamma lamellar colonies with a grain size of less than 30 mu m, while microstructure in the near surface zone was a mixture of fine-grained DP and retained cast structure. Due to solidification segregation, beta (B2) phase existed at the grain boundaries and triple junctions. The alloy exhibited a good balance between both room temperature (RT) and high temperatures tensile properties, and the brittle-to-ductile transition temperature was about 760 degrees C. The fracture mode was predominantly transgranular fracture at both RI and high temperatures.

引用

页码：102 / +

页数：2

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