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

Research output: Contribution to journalLetterResearchpeer-review

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.

Original languageEnglish
Pages (from-to)142-144
Number of pages3
JournalMaterials Letters
Volume205
DOIs
Publication statusPublished - 15 Oct 2017
Externally publishedYes

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friction stir welding
Friction stir welding
welding
Welding
Entropy
entropy
microstructure
Microstructure
heat affected zone
Grain refinement
Heat affected zone
Joining
hardness
grain size
Metals
Hardness
Acoustic waves
engineering
Defects
acoustics

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Zhu, Z. G., Sun, Y. F., Goh, M. H., Ng, F. L., Nguyen, Q. B., Fujii, H., ... Shek, C. H. (2017). Friction stir welding of a CoCrFeNiAl0.3 high entropy alloy. Materials Letters, 205, 142-144. https://doi.org/10.1016/j.matlet.2017.06.073
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. / Friction stir welding of a CoCrFeNiAl0.3 high entropy alloy. In: Materials Letters. 2017 ; Vol. 205. pp. 142-144.
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Zhu, ZG, Sun, YF, Goh, MH, Ng, FL, Nguyen, QB, Fujii, H, Nai, SML, Wei, J & Shek, CH 2017, 'Friction stir welding of a CoCrFeNiAl0.3 high entropy alloy', Materials Letters, vol. 205, pp. 142-144. https://doi.org/10.1016/j.matlet.2017.06.073

Friction stir welding of a CoCrFeNiAl0.3 high entropy alloy. / 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.

In: Materials Letters, Vol. 205, 15.10.2017, p. 142-144.

Research output: Contribution to journalLetterResearchpeer-review

TY - JOUR

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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