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^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

88 Citations (Scopus)

Abstract

A typical face-centered cubic CoCrFeNiAl_0.3high 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 refine- ment. 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 recryatl- lization. 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
Journal	Materials Letters
Volume	205
Online published	16 Jun 2017
DOIs	https://doi.org/10.1016/j.matlet.2017.06.073
Publication status	Published - 15 Oct 2017

Research Keywords

Friction stir welding
Hardness
High entropy alloys
Microstructure

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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 refine- ment. 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 recryatl- lization. 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",

pages = "142--144",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

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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 refine- ment. 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 recryatl- lization. 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 refine- ment. 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 recryatl- lization. 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

UR - http://www.scopus.com/inward/record.url?scp=85021084064&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85021084064&origin=recordpage

U2 - 10.1016/j.matlet.2017.06.073

DO - 10.1016/j.matlet.2017.06.073

M3 - RGC 21 - Publication in refereed journal

SN - 0167-577X

VL - 205

SP - 142

EP - 144

JO - Materials Letters

JF - Materials Letters

ER -

Friction stir welding of a CoCrFeNiAl_0.3 high entropy alloy

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GRF: The Effects of Thermo-mechanical Treatment and Large Current Pulses on the Microstructure and Mechanical Properties of CoCrFeNiX High-entropy Alloys

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Friction stir welding of a CoCrFeNiAl0.3 high entropy alloy

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GRF: The Effects of Thermo-mechanical Treatment and Large Current Pulses on the Microstructure and Mechanical Properties of CoCrFeNiX High-entropy Alloys

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Friction stir welding of a CoCrFeNiAl_0.3 high entropy alloy