Friction Stir Welding of the Carbon-Doped Dual-Phase High Entropy Alloy

Dmitry Shaysultanov; Kazimzhon Raimov; Nikita Stepanov

doi:10.4028/www.scientific.net/SSP.316.364

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HomeSolid State PhenomenaSolid State Phenomena Vol. 316Friction Stir Welding of the Carbon-Doped...

Friction Stir Welding of the Carbon-Doped Dual-Phase High Entropy Alloy

Abstract:

Fe₄₉Mn₃₀Cr₁₀Co₁₀C₁ high entropy alloy (HEA) is produced by induction melting. The as-cast alloy is cold rolled and annealed at 900°C, to produce fine recrystallized structure before friction stir welding (FSW). The structure of the annealed alloy consists of a recrystallized face-centered cubic (fcc, γ) and hexagonal close-packed (hcp, ε) phases with volume fractions of 91% and 5%, respectively, as well as M₂₃C₆ carbides with the volume fraction of 4%. Sound weld without visible defects, such as porosity or cracks, are obtained. Friction stir welding results in a decrease in the average grain size from 7.0 to 1.9 μm in the stir zone. The volume fraction of the M₂₃C₆ carbides decreases to 1% after FSW. The alloy shows high yield strength and ultimate tensile strength of 475 MPa and 865 MPa, respectively, together with elongation of 70%.

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Periodical:

Solid State Phenomena (Volume 316)

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364-368

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https://doi.org/10.4028/www.scientific.net/SSP.316.364

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Online since:

April 2021

Authors:

Dmitry Shaysultanov*, Kazimzhon Raimov, Nikita Stepanov

Keywords:

Friction Stir Welding, High Entropy Alloy, Microstructure, TRIP Effect

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