Analysis on high temperature properties of TiAl alloy joints brazd with a Ti-based filler

被引：0

作者：

Li Z. ^{[1
]}

Li X. ^{[1
]}

Li L. ^{[2
]}

Lou L. ^{[1
]}

Qu S. ^{[1
]}

机构：

[1] National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou

[2] East China Jiaotong University, Nanchang

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2019年 / 40卷 / 05期

关键词：

Brazing; High temperature mechanical properties; Postweld heat treatment; TiAl alloy;

D O I：

10.12073/j.hjxb.2019400143

中图分类号：

学科分类号：

摘要：

Vacuum brazing of TiAl alloy with Ti-Zr-Cu-Ni-Co-Mo amorphous filler as interlayer was investigated. The shear strength and tensile strength at high temperature of the joints brazed at 1 000℃ for 5 min were studied and was compared with the strength of base metal. Results show that the brazed joints can be used for a long time at 700℃, but the shear strength of the joints decreases sharply when the shear testing temperature is higher than 700℃ due to the formation of oxide and the change of microstructures in the central zone of brazed joints. The tensile strength of brazed joints and base metal obtained at different tensile testing temperatures decreases with the increasing of testing temperature. The research shows that the gap between brazed joints and base metal decreases first and then increases, and the room temperature performance of brazed joints and base metal can still be maintained above 80% at temperature of not higher than 600 and 800℃, respectively. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.

引用

页码：148 / 153

页数：5

共 10 条

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