Rotary friction welding of Inconel 718 – AISI 304 stainless steel dissimilar joint

Ajay, V.; Kumar, M. Naveen; Babu, N. Kishore; Kumar, T. Mahesh; Krishna, K. Vamshi; Reddy, G. Madhusudan

doi:10.1080/02670836.2023.2187146

Cited by 7 publications

(4 citation statements)

References 32 publications

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“…The hardness was lowest in the area 2 mm from the joint center, which was the HAZ, where grain coarsening occurred during the welding process, and the degree of grain coarsening varied from region to region, with low grain boundary strengthening and dislocation strengthening levels. As a result, there are varying degrees of hardness reduction [ 1 , 30 ].…”

Section: Resultsmentioning

confidence: 99%

“…FGH96 is a second-generation damage-tolerant powder metallurgy superalloy [ 1 ]. Compared with the first-generation powder metallurgy superalloy, the content of Ti, Cr, Co, W and Mo is increased, while the content of Al, Nb and C is decreased, so as to reduce the content of γ′ phase and carbides, as well as to adjust the grain size and appropriately reduce the levels of strength.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Mechanical Properties of Powder Metallurgy Superalloy Joints Welded by Inertia Friction Welding

Zhang,

Zhao,

Tong

et al. 2024

Materials

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In recent years, for the structural characteristics and design requirements of the integral rotor and disc shaft of the integrated engine, the welding quality and mechanical properties of superalloy weldments have received increasing attention. In this paper, inertia friction welding (IFW) of FGH96 alloy was carried out using different welding parameters, and the homogeneous connection of FGH96 alloy hollow bars was successfully realized. The microstructure evolution, mechanical properties and fracture failure of the welded joints at room and high temperatures were investigated. The FGH96 alloy IFW joints were divided into the weld nugget zone (WNZ), the thermo-mechanically affected zone (TMAZ), the heat-affected zone (HAZ) and the base metal (BM), and there were significant differences in grain structure and distribution of the γ′ phase in each of the characteristic zones. The microhardness and tensile properties of the IFW joints were investigated, and the results showed an “M”-shaped curve in the microhardness distribution, with the lowest point of hardness observed in the HAZ. The tensile test results indicated that the fracture position moved from the BM to the WNZ with the increase in temperature, the microstructure at the fracture changed significantly and the tensile strength decreased from 1512.0 MPa at room temperature to 1201.3 MPa at 750 °C. The difference in the mechanical properties of the joints was mainly attributed to the changes in the dissolution and precipitation of the γ′ phase.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Powder Metallurgy Superalloy Joints Welded by Inertia Friction Welding

Zhang,

Zhao,

Tong

et al. 2024

Materials

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“…During the welding process, there was significant plastic deformation in the WZ, which produced deformed grains with a high dislocation density. At the same time, because the peak temperature at the weld was higher, it provided conditions for the dynamic recrystallization of deformed grains [21]. Significant grain refinement was found in the WZ.…”

Section: Microstructure At the Interface Zonementioning

confidence: 99%

“…According to Luo et al [20], the tensile strength of K418/42CrMo welded joints was enhanced by the features of current inertial friction welding (CIFW), including local occlusion, mechanical interlocking and diffusion bonding. Ajay et al [21] investigated the mechanical properties of CDFW joints made of Inconel 718 and AISI 304. It was discovered that the tensile fracture was on the AISI 304 side, and a network of dimples was present on the fractured surface.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of IN690 Ni-Based Alloy/316LN Stainless-Steel Dissimilar Ring Joint Welded by Inertia Friction Welding

Tong,

Zhang,

et al. 2024

Materials

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Inertia friction welding (IFW) was used to join large-diameter hollow bars made of Inconel 690 and 316LN successfully. The interfacial characteristics, microstructure, mechanical properties and fracture mechanism of welded joints under different process parameters were investigated. The results indicated that a joining mechanism with mechanical interlocking and metallurgical bonding was found in IFW joints. There was a significant mechanical mixing zone at the welding interface. The elemental diffusion layer was found in the “wrinkles” of the mechanical mixing zone. A tiny quantity of C elements accumulated on the friction and secondary friction surfaces. The tensile strength and impact toughness of the joints increased with the total welding energy input. Increasing the friction pressure could make the grain in all parts of the joint uniformly refined, thus enhancing the mechanical properties of welded joints. The maximum tensile strength and impact toughness of the welded joint were 639 MPa and 146 J/cm2, reaching 94% and 68% of that for Inconel 690, respectively, when the flywheel was initially set at 760 rpm, 200 MPa for friction pressure, and 388 kg/m2 for rotary inertia. Due to the Kirkendall effect in the welded joint, superior metallurgical bonding was at the welding interface close to the Inconel 690 side compared to the 316LN side.

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A critical review on solid-state welding of high entropy alloys– processing, microstructural characteristics and mechanical properties of joints

et al. 2024

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Rotary friction welding of Inconel 718 – AISI 304 stainless steel dissimilar joint

Cited by 7 publications

References 32 publications

Microstructure and Mechanical Properties of Powder Metallurgy Superalloy Joints Welded by Inertia Friction Welding

Microstructure and Mechanical Properties of Powder Metallurgy Superalloy Joints Welded by Inertia Friction Welding

Microstructure and Mechanical Properties of IN690 Ni-Based Alloy/316LN Stainless-Steel Dissimilar Ring Joint Welded by Inertia Friction Welding

A critical review on solid-state welding of high entropy alloys– processing, microstructural characteristics and mechanical properties of joints

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