Understanding the oxidation behavior of TiAl alloy joints brazed using Ti and Ni based filler

Anran Ming; Chun Li; Yongxu Liu; Lei Chen; Chenghao Zhang; Xiaoqing Si; Xiangyu Dai; Junlei Qi; Jian Cao

Journal of Materials Research and Technology (Jan 2024)

Understanding the oxidation behavior of TiAl alloy joints brazed using Ti and Ni based filler

Anran Ming,
Chun Li,
Yongxu Liu,
Lei Chen,
Chenghao Zhang,
Xiaoqing Si,
Xiangyu Dai,
Junlei Qi,
Jian Cao

Affiliations

Anran Ming: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
Chun Li: Corresponding author.; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
Yongxu Liu: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
Lei Chen: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
Chenghao Zhang: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
Xiaoqing Si: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
Xiangyu Dai: Corresponding author.; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
Junlei Qi: State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
Jian Cao: Corresponding author.; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China

Journal volume & issue: Vol. 28
pp. 2033 – 2044

Abstract

Read online

Vacuum brazing of TiAl alloy is achieved using TiZrNiCu fillers and BNi-2 fillers. The oxidation behavior of the two kinds of TiAl alloy joints is investigated in air at 800 °C. The influence of high-temperature oxidation on the microstructure and mechanical properties of the joints are characterized by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and shear tests. It is found that long-term oxidation does not have a large effect on the microstructure of joints. However, the fillet of the brazed joint achieved via BNi-2 fillers forms longitudinal solidification cracks, which proved that the brazed joint using TiZrNiCu fillers shows more excellent oxidation resistance.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

About the journal

Abstract

Keywords