Diffusion bonding of laser surface modified TiAl alloy/Ni alloy

Li, Z.F.; Wu, Guo Qing; Huang, Zheng; Ruan, Zheng

doi:10.1016/j.matlet.2004.07.007

Cited by 29 publications

(5 citation statements)

References 8 publications

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“…However, a common challenge in applying interlayers for bonding TiAl alloys is the size and shape limits of components, because the nanolayers are difficult to be used in a TiAl component with complex mating surfaces or large size. Therefore, the direct diffusion bonding with surface processing [19] and PBHT [20] was developed to treat the problem. To be specific, the surface processing and PBHT aim at improving the diffusion rate of atoms across the bonding interface or promoting the interface migration by recrystallization.…”

Section: Introductionmentioning

confidence: 99%

Recrystallization Behavior at Diffusion Bonding Interface of High Nb Containing TiAl Alloy

Tang

Kou

et al. 2015

Adv Eng Mater

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A series of diffusion bonding tests are conducted on a high Nb containing TiAl alloy with full lamellar (FL) microstructure and the effect of interfacial recrystallization behavior on the shear strength is discussed. Microstructural observations reveal that bonding above 1 100 C and 30 MPa results in recrystallization at the bonding interface flanked by FL microstructure, thus promoting the interface migration and leading to a sound joint. Based on the present results, the nucleation mechanism of recrystallization at the bonding interface is studied. Shear testing results show that recrystallization at the bonded zone improves the bonding quality of the joints by changing the failure mode. The shear strength of the joints attains 400 MPa when bonding at 1 150 C/30 MPa/45 min and 1 100 C/40 MPa/45 min.

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Section: Introductionmentioning

confidence: 99%

Recrystallization Behavior at Diffusion Bonding Interface of High Nb Containing TiAl Alloy

Tang

Kou

et al. 2015

Adv Eng Mater

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“…The traditional surface modification techniques, such as spraying, electroplating and chemical heat treatment, are not very satisfactory because either the bonding of coating and substrate is poor or the thickness of the coating is too thin [10][11][12][13][14][15] . The laser cladding and the plasma cladding overcome the shortcomings of the traditional surface modification and have been subjected to rapid development in recent years.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and thermal physical parameters of Ni60-Cr3C2 composite coating by laser cladding

Pan

Wang

et al. 2010

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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To satisfy performance and long life requirements for hot forging die, Ni60-Cr 3 C 2 composite coatings were prepared on the high-speed steel W 6 Mo 5 Cr 4 V 2 using laser cladding technology. Laser clad coatings with different ratios of Ni60:Cr 3 C 2 were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray analysis (EDX) and microhardness tester, respectively. Specific heat capacity and thermal conductivity were measured by Laser Thermal Constant Meter. Thermal expansion coefficient and elastic modulus were measured by Dynamic Mechanical Thermal Analyzer and Electro-Hydraulic Servocontrolled Testing System, respectively. The results indicated that Ni60＋50wt% Cr 3 C 2 composite coating had dense and homogeneous structure, as well as a metallurgical bonding with the substrate. With the increase of Cr 3 C 2 content, volume of chromium-containing compounds in the composite coating increased, microhardness increased and microstructure refined. The thermal physical parameters results showed that Ni60＋ 50wt% Cr 3 C 2 composite coating was overall worse than W 6 Mo 5 Cr 4 V 2 , but had a higher hot yield strength to alleviate hot fatigue and surface hot wear of hot forging die during hot forging and thus improve the service life of hot forging die.

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“…It was also observed that preheating of base plate (Ti-6Al-4V) abridged the formation of crack in the clad region. Li et al [126] have reported that the laser surface modification of Ti-46.5Al-2Cr-1.5Nb-1V surface for the diffusion bonding with the nickel-based alloy. The laser surface modified region consists of fine dendritic a 2 -Ti 3 Al and g-TiAl phases.…”

Section: Why Reclamation Of Aerospace Components Using Directed Energ...mentioning

confidence: 99%

Reclamation of intermetallic titanium aluminide aero-engine components using directed energy deposition technology

Mallikarjuna

Reutzel

2022

Manufacturing Rev.

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Titanium Aluminide (TiAl) alloys are intermetallics that offer low density, high melting point, good oxidation and corrosion resistance compared to Ni-based superalloys. As a result, these alloys are used in aero-engine parts such as turbine blades, fuel injectors, radial diffusers, divergent flaps, and more. During operation, aero-engine components are subjected to high thermal loading in an oxidizing and corrosive environment, which results in wear and other material damage. Replacement of the entire component may not be desirable due to long lead time and expense. In such cases, repair and refurbishing may be the best option for the reclamation of TiAl parts. Unfortunately, approved repair technology is not currently available for TiAl based components. Additive Manufacturing (AM) based Directed Energy Deposition (DED) may serve as an option to help repair and restore expensive aero-engine parts. In this work, a review of efforts to utilize the DED technique to repair damaged TiAl-based aerospace parts locally is conducted. Replacing the entire TiAl part is not advisable as it is expensive. DED is a promising technique used to produce, repair, rework, and overhaul (MRO) damaged parts. Considering the high-quality standard of the aircraft industry, DED repaired TiAl parts to be certified for their future use in the aircraft is very important. However, there are no standards for the certification of TiAl repaired parts is reported. Case studies reveal that DED is under consideration for repair of TiAl parts. Hybrid technology comprising machining, repair and finishing capability in a single machine is an attractive implementation strategy to improve repair efficacies. The review shows that the investigations into development and applications of DED-based repairing techniques are limited, which suggests that further investigations are very much needed.

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Diffusion bonding of laser surface modified TiAl alloy/Ni alloy

Cited by 29 publications

References 8 publications

Recrystallization Behavior at Diffusion Bonding Interface of High Nb Containing TiAl Alloy

Recrystallization Behavior at Diffusion Bonding Interface of High Nb Containing TiAl Alloy

Microstructure and thermal physical parameters of Ni60-Cr3C2 composite coating by laser cladding

Reclamation of intermetallic titanium aluminide aero-engine components using directed energy deposition technology

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