Effect of Preheating on the Inertia Friction Welding of the Dissimilar Superalloys Mar-M247 and LSHR

Senkov, O.N.; Mahaffey, D. W.; Semiatin, S. L.

doi:10.1007/s11661-016-3784-0

Cited by 10 publications

(2 citation statements)

References 18 publications

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“…The chain of the oxide/carbide particles remains linear, separates from the weld line, and is located inside the Mar-M247 alloy in this region. An increase in the preheat temperature enhanced the plastic flow of Mar-M247 during IFW, which resulted in extensive mechanical mixing with LSHR at the weld interface, the formation of extensive flash on both the Mar-M247 and LSHR sides, and achieved a sound bond [8]. Failures also were seen in the plasticized layer on the aluminum side of the joint for dissimilar friction welding of 6061-T6 aluminum and AISI 1018 steel.…”

Section: Introductionmentioning

confidence: 99%

Change of microstructure and properties of dual titanium alloy join interface in hot working history

et al. 2020

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In order to get workpiece with high tensile stresses in bore region and high temperature duration, creep strength in outskirts, the dual alloy samples made of high temperature titanium alloy Ti60 and high strength titanium alloy Ti6246 had been joined by inertia friction welding(IFW). Then these samples were isothermal forged at 9400c and 9750c, and different heat treatment followed. Changes of microstructure and properties of dual titanium alloy join interface in hot working history were examined at this article. The results show equiaxed α structure varied into basketweave structureat at as-welded join interface, especially a character of widmannstaten structure emerged from Ti6246 alloy side heat effect region, after gradient heat treatment. Immersed ultrasonic testing prove deformation can availably eliminate weld defect through metal on two side of weld line deeper embedding each other. The results of properties test also show the join strength of dual titanium alloy through isothermal deformation and gradient heat treatment are better than that of as-welded samples. Tensile strength, yield strength, elongating rate, reduction in area of sample at 5500c also increase 51 to145 MPa, 37 to 101 MPa, 1.6% to 5.3%, 15.3% to 3.3% than that of as-welded samples respectively. The rupture life of Ti60/Ti6246 dual titanium samples with join interface can sustain to go beyond 100 hours at 5500c and 320 PMa stress.

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Section: Introductionmentioning

confidence: 99%

Change of microstructure and properties of dual titanium alloy join interface in hot working history

et al. 2020

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“…[3,5,6] Preheating of the material before welding improved its weldability and led to a thicker layer of recrystallized c grains and c¢ precipitates, but plastic deformation of the material beyond the fine-grained layer may still lead to decreased performance. [8] Residual stresses from the friction welding process were also investigated, with higher residual stresses observed in materials with larger c¢ volume fractions, and post-weld heat treatments were required to relieve residual hoop stresses below 400 MPa. [9] The main drawback of linear friction welding is the formation of a HAZ associated with residual stresses that contributes to a reduction in mechanical properties.…”

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confidence: 99%

Solid-State Joining of Dissimilar Ni-Based Superalloys via Field-Assisted Sintering Technology for Turbine Applications

Lin

Yamamoto

King

et al. 2021

Metall Mater Trans A

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Friction welding or electron/laser beam welding of nickel superalloys compromises the microstructure with localized melting and heat-affected zones (HAZ). In this work, Field-Assisted Sintering Technology (FAST) is studied as an alternative method for solid-state diffusion bonding of superalloys CM247LC and Inconel 718. Bonding microstructures and room-temperature tensile strengths are evaluated. Preliminary results suggest that FAST bonding leads to an interface with a compositional gradient without producing a HAZ and without losing tensile strength.

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Microstructure and mechanical property variations within inertia friction-welded joints of stainless steel to steel

Switzner¹,

Yu²,

Eff

et al. 2018

Int J Adv Manuf Technol

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Effect of Preheating on the Inertia Friction Welding of the Dissimilar Superalloys Mar-M247 and LSHR

Cited by 10 publications

References 18 publications

Change of microstructure and properties of dual titanium alloy join interface in hot working history

Change of microstructure and properties of dual titanium alloy join interface in hot working history

Solid-State Joining of Dissimilar Ni-Based Superalloys via Field-Assisted Sintering Technology for Turbine Applications

Microstructure and mechanical property variations within inertia friction-welded joints of stainless steel to steel

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