Effect of LaNd on the spreadability of Ti-13Zr-21Cu-9Ni brazing fillers and the properties of TC4 joint

LI Chaojun; YAN Yanfu; REN Xiaofei; WANG Yaming; WANG Hongna

doi:10.12073/j.hjxb.20200527002

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2020 > 41(12): 74-79. > DOI: 10.12073/j.hjxb.20200527002

LI Chaojun, YAN Yanfu, REN Xiaofei, WANG Yaming, WANG Hongna. Effect of LaNd on the spreadability of Ti-13Zr-21Cu-9Ni brazing fillers and the properties of TC4 joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(12): 74-79. DOI: 10.12073/j.hjxb.20200527002

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Effect of LaNd on the spreadability of Ti-13Zr-21Cu-9Ni brazing fillers and the properties of TC4 joint

Henan University of Science and Technology, Henan, 471023, China

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Received Date: May 26, 2020
Available Online: January 26, 2021

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Abstract

Abstract

In order to optimize the properties of Ti-13Zr-21Cu-9Ni brazing fillers and obtain a good performance Ti alloy joint, rare earth element LaNd was added to Ti-13Zr-21Cu-9Ni brazing fillers. The commonly used TC4 alloy was used as the mother The effect of rare earth element LaNd on the spreading performance of Ti-13Zr-21Cu-9Ni brazing fillers and the performance of TC4 joints was studied by vacuum furnace, field emission scanning electron microscope, X-ray diffractometer and other equipment. The results showed that the spread area of Ti-13Zr-21Cu-9Ni-xLaNd brazing fillers and the shear strength of Ti-13Zr-21Cu-9Ni-xLaNd/TC4 brazed joints first increased and then decreased with the addition of LaNd increased. When the LaNd addition is 0.3%, Ti-13Zr-21Cu-9Ni-xLaNd brazing fillers has the largest spreading area, the maximum value is 0.74 cm², which is 88.8% higher than the matrix; when the addition of LaNd continues to increase, the formed Cu₅La phase greatly reduce the spreading performance of the brazing fillers. Ti-13Zr-21Cu-9Ni-xLaNd/TC4 brazed joint shear strength reaches the maximum when the LaNd addition is 0.3%, which is 157.1 MPa, which is 45.2% higher than the matrix. Therefore, the optimal addition of LaNd It should be around 0.3%.
- rare earth lanthanum and neodymium,
- titanium alloy joint,
- spreadability,
- shear strength

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Effect of LaNd on the spreadability of Ti-13Zr-21Cu-9Ni brazing fillers and the properties of TC4 joint