Evaluation of the bonded ratio of TC4 diffusion bonded joints based on ultrasonic C-scan

Xiong, Jiangtao; Sun, Jiajia; Wang, J.C.; Zhang, H.; Shi, Junmiao; Li, J.L.

doi:10.1016/j.jmapro.2019.09.025

Cited by 8 publications

(3 citation statements)

References 9 publications

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“…Another way is to analyze the full waveform of the C-scan to extract waveforms, spectra, phase characteristics, etc. that reflect the performance of the diffusion-bonded interface, that is, using the ultrasonic characteristic scanning method (F-scan) to detect the diffusion-bonded components [ 11 , 12 ], thereby further improving their detection capability. However, this method requires complex signal processing, and it still falls within the scope of linear ultrasound, and its detection sensitivity will not exceed 1/2 of the corresponding wavelength.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Ultrasonic C-Scan Imaging for Contact-Type Defects in Diffusion-Bonded Joints—A Case Study

Zhang,

Pan,

Liu

et al. 2024

Materials

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Diffusion bonding technology is widely used in the connection of precision components, yet accurately and reliably detecting contact-type defects on the bond interface still remains a significant problem. Nonlinear ultrasonic methods have been proven to be sensitive to contact-type defects; however, the use of continuous wave or tone burst wave excitation limits its wider application. In this paper, dual-probe nonlinear ultrasonic testing with pulse wave excitation is proposed to detect contact-type defects in diffusion-bonded joints. A titanium alloy diffusion-bonded specimen with artificial defects was fabricated, and the corresponding detection device was designed based on the existing ultrasonic C-scan testing system. A C-scan imaging program based on nonlinear parameters was developed by extracting the fundamental and second harmonic waves of the reflection echo on the bond interface. The results demonstrated that the proposed detection scheme can obtain the nonlinear parameters of diffusion-bonded interfaces, and the nonlinear ultrasonic C-scan image of the bond interface is also obtained. The nonlinear parameter in the contact-type defects areas calculated from the bond interface echo is about 10 times (20 dB) higher than that in macro defects areas, whose gap is about 10 μm. The results indicate that the nonlinear ultrasonic methods seem to be more sensitive to contact-type defects and have a great potential to complement the insufficient detection capability of linear ultrasound for diffusion-bonded joints.

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Section: Introductionmentioning

confidence: 99%

Nonlinear Ultrasonic C-Scan Imaging for Contact-Type Defects in Diffusion-Bonded Joints—A Case Study

Zhang,

Pan,

Liu

et al. 2024

Materials

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“…Due to the complexity of the diffusion bonding process, factors such as surface roughness of the workpiece material and contamination or improper selection of the diffusion joining process parameters will cause defects in the diffusion bonding interface. These defects, such as unbonded and interfacial microvoids, seriously reduce the mechanical properties of TC4 alloy diffusion bonding components [ 2 ], such as those of the hollow blades of aeroengines [ 3 , 4 , 5 ]. Considering the requirements for high reliability and safety in the aerospace field, reliable nondestructive testing for TC4 diffusion bonding joints is required.…”

Section: Introductionmentioning

confidence: 99%

A Method for Prediction of Ultrasonic Detectability of Interface Gap Defects on TC4 Diffusion-Bonded Joints

Teng

Zhou

2022

Nanomaterials

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An analysis method for the detectability of defects on the TC4 (Ti-6Al-4V) diffusion bonding interface was proposed in this study. First, a semi-analytical model of the liquid–solid coupling acoustic field with attenuation characteristics was constructed. Based on this, a method for the selection of transducer parameters was investigated for effective focus on the diffusion bonding interface. Second, according to the characteristics of defects on the diffusion bonding interface, an acoustic response model for diffusion bonding defects was established based on Kirchhoff approximation. The detectability of defects on the diffusion bonding interface was analyzed using transducers of different frequencies with different diffusion bonding interface gaps. Finally, an experiment was conducted to verify the reliability of the simulation. The analysis method proposed shows the advantages in the selection of suitable parameters for detecting specific diffusion bonding interface gaps, providing theoretical predictions of the detectability of diffusion bonding interface defects.

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“…To eliminate the adverse effects, post-weld heat treatment is required. Brazing and transient liquid phase (TLP) bonding are also used to join Ti 2 AlNb alloy [21] and TC4 alloy [22,23]. Researchers have obtained satisfactory results using the Ti-Zr-Ni-Cu [24], Ti-Ni-Cu [25], and Ti-Ni-Nb [26] filler metals or interlayers.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Ti2AlNb/Ti/TC4 Joint

Wang

Yan

et al. 2021

Crystals

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In this paper, the Ti2AlNb alloy was bonded to TC4 alloy using the vacuum diffusion bonding method with a Ti interlayer. The interfacial microstructure of the Ti2AlNb/Ti/TC4 joint was characterized. The relationship between the bonding parameters and the microstructure and mechanical property of the joints was explored. Results indicated that the interdiffusion of Nb and Al elements between the interlayer and substrates promoted the formation of the lamellar α + β dual-phase structure in the joint. The bonding parameters determined the diffusion distance of Nb and Al elements, thus controlling the characteristics of the lamellar α + β dual-phase structure. When the Ti2AlNb alloy and TC4 alloy were bonded at 950 °C for 30 min under a pressure of 10 MPa, the elemental diffusion in the bonding couple was sufficient and the joint possessed the maximum shear strength of 549 MPa.

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Evaluation of the bonded ratio of TC4 diffusion bonded joints based on ultrasonic C-scan

Cited by 8 publications

References 9 publications

Nonlinear Ultrasonic C-Scan Imaging for Contact-Type Defects in Diffusion-Bonded Joints—A Case Study

Nonlinear Ultrasonic C-Scan Imaging for Contact-Type Defects in Diffusion-Bonded Joints—A Case Study

A Method for Prediction of Ultrasonic Detectability of Interface Gap Defects on TC4 Diffusion-Bonded Joints

Microstructure and Mechanical Properties of Vacuum Diffusion Bonded Ti2AlNb/Ti/TC4 Joint

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