Direct drive friction welding of a multi-phase Al13Cr23.5Fe20Co20Ni23.5 high-entropy alloy

Lei Zuo; Kai Zhang; Tao Zhang

doi:10.1080/13621718.2021.1957631

Direct drive friction welding of a multi-phase Al₁₃Cr_23.5Fe₂₀Co₂₀Ni_23.5 high-entropy alloy

Lei Zuo, Kai Zhang, Tao Zhang^*

^*Corresponding author for this work

School of Aerospace Engineering

Beihang University

Research output: Contribution to journal › Article › peer-review

Abstract

Al₁₃Cr_23.5Fe₂₀Co₂₀Ni_23.5 high-entropy alloy with three phases (face-centered cubic [FCC], A2 and B2) was joined successfully by direct drive friction welding. The microhardness of the welded samples gradually increases as approaching the weld interface, which was related to the microstructural evolution across the weld interface. The weld joint can be divided into four regions: dynamic recrystallisation zone, thermal-mechanically affected zone, heat affected zone and base metal. It is found that the volume fraction ratio of FCC to body-centered cubic (BCC) (A2+B2) phases slightly decreases as approaching the weld interface. The hardening of the joint is attributed to the refined structure, large deformation and the increased volume fraction of the hard BCC phases in the weld joint.

Original language	English
Pages (from-to)	513-520
Number of pages	8
Journal	Science and Technology of Welding and Joining
Volume	26
Issue number	7
DOIs	https://doi.org/10.1080/13621718.2021.1957631
Publication status	Published - 2021

Keywords

High-entropy alloys
direct-drive friction welding
mechanical properties
microstructure

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10.1080/13621718.2021.1957631

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title = "Direct drive friction welding of a multi-phase Al13Cr23.5Fe20Co20Ni23.5 high-entropy alloy",

abstract = "Al13Cr23.5Fe20Co20Ni23.5 high-entropy alloy with three phases (face-centered cubic [FCC], A2 and B2) was joined successfully by direct drive friction welding. The microhardness of the welded samples gradually increases as approaching the weld interface, which was related to the microstructural evolution across the weld interface. The weld joint can be divided into four regions: dynamic recrystallisation zone, thermal-mechanically affected zone, heat affected zone and base metal. It is found that the volume fraction ratio of FCC to body-centered cubic (BCC) (A2+B2) phases slightly decreases as approaching the weld interface. The hardening of the joint is attributed to the refined structure, large deformation and the increased volume fraction of the hard BCC phases in the weld joint.",

keywords = "High-entropy alloys, direct-drive friction welding, mechanical properties, microstructure",

author = "Lei Zuo and Kai Zhang and Tao Zhang",

note = "Publisher Copyright: {\textcopyright} 2021 Institute of Materials, Minerals and Mining. Published by Taylor & Francis on behalf of the Institute.",

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doi = "10.1080/13621718.2021.1957631",

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T1 - Direct drive friction welding of a multi-phase Al13Cr23.5Fe20Co20Ni23.5 high-entropy alloy

AU - Zuo, Lei

AU - Zhang, Kai

AU - Zhang, Tao

PY - 2021

Y1 - 2021

N2 - Al13Cr23.5Fe20Co20Ni23.5 high-entropy alloy with three phases (face-centered cubic [FCC], A2 and B2) was joined successfully by direct drive friction welding. The microhardness of the welded samples gradually increases as approaching the weld interface, which was related to the microstructural evolution across the weld interface. The weld joint can be divided into four regions: dynamic recrystallisation zone, thermal-mechanically affected zone, heat affected zone and base metal. It is found that the volume fraction ratio of FCC to body-centered cubic (BCC) (A2+B2) phases slightly decreases as approaching the weld interface. The hardening of the joint is attributed to the refined structure, large deformation and the increased volume fraction of the hard BCC phases in the weld joint.

AB - Al13Cr23.5Fe20Co20Ni23.5 high-entropy alloy with three phases (face-centered cubic [FCC], A2 and B2) was joined successfully by direct drive friction welding. The microhardness of the welded samples gradually increases as approaching the weld interface, which was related to the microstructural evolution across the weld interface. The weld joint can be divided into four regions: dynamic recrystallisation zone, thermal-mechanically affected zone, heat affected zone and base metal. It is found that the volume fraction ratio of FCC to body-centered cubic (BCC) (A2+B2) phases slightly decreases as approaching the weld interface. The hardening of the joint is attributed to the refined structure, large deformation and the increased volume fraction of the hard BCC phases in the weld joint.

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KW - mechanical properties

KW - microstructure

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Direct drive friction welding of a multi-phase Al₁₃Cr_23.5Fe₂₀Co₂₀Ni_23.5 high-entropy alloy

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