Revealing the Precipitation Sequence with Aging Temperature in a Non-equiatomic AlCoCrFeNi High Entropy Alloy

Vickey Nandal; Bushra Harun; R. Sarvesha; Sudhanshu S. Singh; E. Wen Huang; Yao Jen Chang; An Chou Yeh; Jayant Jain; Suresh Neelakantan

doi:10.1007/s11661-021-06528-7

Revealing the Precipitation Sequence with Aging Temperature in a Non-equiatomic AlCoCrFeNi High Entropy Alloy

Vickey Nandal, Bushra Harun, R. Sarvesha, Sudhanshu S. Singh, E. Wen Huang, Yao Jen Chang, An Chou Yeh, Jayant Jain^*, Suresh Neelakantan^*

^*Corresponding author for this work

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

12 Scopus citations

Abstract

Sequential transformation in precipitate structure from L1₂ → B2-NiAl precipitate has been observed for Al_0.5Co_1.5CrFeNi_1.5 alloy with the increase in aging temperature. At 650 °C, the FCC matrix contained L1₂ precipitates (γ′), which were transformed into ordered B2 structure precipitate at 750 °C. A coarser and more stable B2-NiAl rich precipitate has been observed for higher aging temperature (850 °C). This transformation is attributed to the higher thermodynamic stability of B2-NiAl precipitates overcoming the nucleation barrier at higher temperatures.

Original language	English
Pages (from-to)	314-321
Number of pages	8
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	53
Issue number	1
DOIs	https://doi.org/10.1007/s11661-021-06528-7
State	Published - Jan 2022

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Nandal, V., Harun, B., Sarvesha, R., Singh, S. S., Huang, E. W., Chang, Y. J., Yeh, A. C., Jain, J., & Neelakantan, S. (2022). Revealing the Precipitation Sequence with Aging Temperature in a Non-equiatomic AlCoCrFeNi High Entropy Alloy. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 53(1), 314-321. https://doi.org/10.1007/s11661-021-06528-7

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title = "Revealing the Precipitation Sequence with Aging Temperature in a Non-equiatomic AlCoCrFeNi High Entropy Alloy",

abstract = "Sequential transformation in precipitate structure from L12 → B2-NiAl precipitate has been observed for Al0.5Co1.5CrFeNi1.5 alloy with the increase in aging temperature. At 650 °C, the FCC matrix contained L12 precipitates (γ′), which were transformed into ordered B2 structure precipitate at 750 °C. A coarser and more stable B2-NiAl rich precipitate has been observed for higher aging temperature (850 °C). This transformation is attributed to the higher thermodynamic stability of B2-NiAl precipitates overcoming the nucleation barrier at higher temperatures.",

author = "Vickey Nandal and Bushra Harun and R. Sarvesha and Singh, {Sudhanshu S.} and Huang, {E. Wen} and Chang, {Yao Jen} and Yeh, {An Chou} and Jayant Jain and Suresh Neelakantan",

note = "Publisher Copyright: {\textcopyright} 2021, The Minerals, Metals & Materials Society and ASM International.",

year = "2022",

month = jan,

doi = "10.1007/s11661-021-06528-7",

language = "English",

volume = "53",

pages = "314--321",

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Nandal, V, Harun, B, Sarvesha, R, Singh, SS, Huang, EW, Chang, YJ, Yeh, AC, Jain, J & Neelakantan, S 2022, 'Revealing the Precipitation Sequence with Aging Temperature in a Non-equiatomic AlCoCrFeNi High Entropy Alloy', Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, vol. 53, no. 1, pp. 314-321. https://doi.org/10.1007/s11661-021-06528-7

TY - JOUR

T1 - Revealing the Precipitation Sequence with Aging Temperature in a Non-equiatomic AlCoCrFeNi High Entropy Alloy

AU - Nandal, Vickey

AU - Harun, Bushra

AU - Sarvesha, R.

AU - Singh, Sudhanshu S.

AU - Huang, E. Wen

AU - Chang, Yao Jen

AU - Yeh, An Chou

AU - Jain, Jayant

AU - Neelakantan, Suresh

PY - 2022/1

Y1 - 2022/1

N2 - Sequential transformation in precipitate structure from L12 → B2-NiAl precipitate has been observed for Al0.5Co1.5CrFeNi1.5 alloy with the increase in aging temperature. At 650 °C, the FCC matrix contained L12 precipitates (γ′), which were transformed into ordered B2 structure precipitate at 750 °C. A coarser and more stable B2-NiAl rich precipitate has been observed for higher aging temperature (850 °C). This transformation is attributed to the higher thermodynamic stability of B2-NiAl precipitates overcoming the nucleation barrier at higher temperatures.

AB - Sequential transformation in precipitate structure from L12 → B2-NiAl precipitate has been observed for Al0.5Co1.5CrFeNi1.5 alloy with the increase in aging temperature. At 650 °C, the FCC matrix contained L12 precipitates (γ′), which were transformed into ordered B2 structure precipitate at 750 °C. A coarser and more stable B2-NiAl rich precipitate has been observed for higher aging temperature (850 °C). This transformation is attributed to the higher thermodynamic stability of B2-NiAl precipitates overcoming the nucleation barrier at higher temperatures.

UR - http://www.scopus.com/inward/record.url?scp=85119044466&partnerID=8YFLogxK

U2 - 10.1007/s11661-021-06528-7

DO - 10.1007/s11661-021-06528-7

M3 - Article

AN - SCOPUS:85119044466

SN - 1073-5623

VL - 53

SP - 314

EP - 321

JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

IS - 1

ER -

Revealing the Precipitation Sequence with Aging Temperature in a Non-equiatomic AlCoCrFeNi High Entropy Alloy

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