Effect of microstructure inhomogeneity of forgings on microstructure and mechanical properties of new near β titanium alloy

被引：0
|
作者：
Chen Q. [1 ]
Wang Q.-J. [1 ]
Wang D.-C. [2 ]
Liu J.-X. [2 ]
Li Q. [1 ]
Zhou X. [1 ]
Liang B. [1 ]
机构：
[1] School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an
[2] Institute of Baoji Titanium Industry Group Co., Ltd., Baoji
来源：
Wang, Qing-Juan (jiandawqj@163.com) | 2018年 / Central South University of Technology卷 / 28期
关键词：
Forged in two-phase region; High strength and high toughness; Inhomogeneity; Precipitated phase; β titanium alloy;
D O I：
10.19476/j.ysxb.1004.0609.2018.01.11
中图分类号：
学科分类号：
摘要：
The influence of inhomogeneity of original microstructures including edge, 1/2R and core of a new β titanium alloy via α+β forging process on microstructures and mechanical properties following heat treatments were investigated. The results show that the distribution of primary α phase in three locations was nonuniform after the alloy solution-treated at 750℃, and at 800℃, different degree of recrystallization occurred within β phase. The alloy solution-treated at 750℃ followed by aging at 510℃ for 8 h, the microstructure with beta fleck happened in edge and 1/2R. Under the same aging condition, when the solution treatment was taken at 800℃, the secondary α phase with obviously uneven distribution precipitates in 1/2R and core. This inhomogeneity of microstructures during aging treatments results in different mechanical properties both of strength and fracture toughness in three locations. The alloys treated at (750℃, 0.5 h, AC)+(510℃, 8 h, AC) acquires good strength-toughness match, and high strength and high toughness of alloy at the location of 1/2R reaches the well match of high strength and high toughness. © 2018, Science Press. All right reserved.
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页码：87 / 96
页数：9
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