Friction stir welding of a CoCrFeNiAl0.3 high entropy alloy

Z. G. Zhu; Y. F. Sun; M. H. Goh; F. L. Ng; Q. B. Nguyen; H. Fujii; S. M.L. Nai; J. Wei; C. H. Shek

doi:10.1016/j.matlet.2017.06.073

Friction stir welding of a CoCrFeNiAl_0.3 high entropy alloy

Z. G. Zhu, Y. F. Sun, M. H. Goh, F. L. Ng, Q. B. Nguyen, H. Fujii, S. M.L. Nai, J. Wei, C. H. Shek

Research output: Contribution to journal › Letter

Abstract

A typical face-centered cubic CoCrFeNiAl_0.3 high entropy alloy was welded by friction stir welding. Sound joints without welding defects were obtained. Four typical regions, the stir zone, thermomechanically affected zone, heat affected zone and base metal could be detected. The stir zone showed a refined equiaxed microstructure due to recrystallization and it exhibited the highest hardness with grain refinement. The grain size decreased slightly with increasing the welding speed. The thermomechanically affected zone exhibited a mixed microstructure comprising coarse and fine grains due to partial recryatllization. The present result shows a potential capability for joining high entropy alloys through friction stir welding and may enhance their engineering applications.

Original language	English
Pages (from-to)	142-144
Number of pages	3
Journal	Materials Letters
Volume	205
DOIs	https://doi.org/10.1016/j.matlet.2017.06.073
Publication status	Published - 15 Oct 2017
Externally published	Yes

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Zhu, Z. G., Sun, Y. F., Goh, M. H., Ng, F. L., Nguyen, Q. B., Fujii, H., Nai, S. M. L., Wei, J., & Shek, C. H. (2017). Friction stir welding of a CoCrFeNiAl_0.3 high entropy alloy. Materials Letters, 205, 142-144. https://doi.org/10.1016/j.matlet.2017.06.073

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title = "Friction stir welding of a CoCrFeNiAl0.3 high entropy alloy",

abstract = "A typical face-centered cubic CoCrFeNiAl0.3 high entropy alloy was welded by friction stir welding. Sound joints without welding defects were obtained. Four typical regions, the stir zone, thermomechanically affected zone, heat affected zone and base metal could be detected. The stir zone showed a refined equiaxed microstructure due to recrystallization and it exhibited the highest hardness with grain refinement. The grain size decreased slightly with increasing the welding speed. The thermomechanically affected zone exhibited a mixed microstructure comprising coarse and fine grains due to partial recryatllization. The present result shows a potential capability for joining high entropy alloys through friction stir welding and may enhance their engineering applications.",

keywords = "Friction stir welding, Hardness, High entropy alloys, Microstructure",

author = "Zhu, {Z. G.} and Sun, {Y. F.} and Goh, {M. H.} and Ng, {F. L.} and Nguyen, {Q. B.} and H. Fujii and Nai, {S. M.L.} and J. Wei and Shek, {C. H.}",

year = "2017",

month = oct

day = "15",

doi = "10.1016/j.matlet.2017.06.073",

language = "English",

volume = "205",

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journal = "Materials Letters",

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T1 - Friction stir welding of a CoCrFeNiAl0.3 high entropy alloy

AU - Zhu, Z. G.

AU - Sun, Y. F.

AU - Goh, M. H.

AU - Ng, F. L.

AU - Nguyen, Q. B.

AU - Fujii, H.

AU - Nai, S. M.L.

AU - Wei, J.

AU - Shek, C. H.

PY - 2017/10/15

Y1 - 2017/10/15

N2 - A typical face-centered cubic CoCrFeNiAl0.3 high entropy alloy was welded by friction stir welding. Sound joints without welding defects were obtained. Four typical regions, the stir zone, thermomechanically affected zone, heat affected zone and base metal could be detected. The stir zone showed a refined equiaxed microstructure due to recrystallization and it exhibited the highest hardness with grain refinement. The grain size decreased slightly with increasing the welding speed. The thermomechanically affected zone exhibited a mixed microstructure comprising coarse and fine grains due to partial recryatllization. The present result shows a potential capability for joining high entropy alloys through friction stir welding and may enhance their engineering applications.

AB - A typical face-centered cubic CoCrFeNiAl0.3 high entropy alloy was welded by friction stir welding. Sound joints without welding defects were obtained. Four typical regions, the stir zone, thermomechanically affected zone, heat affected zone and base metal could be detected. The stir zone showed a refined equiaxed microstructure due to recrystallization and it exhibited the highest hardness with grain refinement. The grain size decreased slightly with increasing the welding speed. The thermomechanically affected zone exhibited a mixed microstructure comprising coarse and fine grains due to partial recryatllization. The present result shows a potential capability for joining high entropy alloys through friction stir welding and may enhance their engineering applications.

KW - Friction stir welding

KW - Hardness

KW - High entropy alloys

KW - Microstructure

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U2 - 10.1016/j.matlet.2017.06.073

DO - 10.1016/j.matlet.2017.06.073

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EP - 144

JO - Materials Letters

JF - Materials Letters

SN - 0167-577X

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