Coherent precipitation and stability of cuboidal nanoparticles in body-centered-cubic Al0.4Nb0.5Ta0.5TiZr0.8 refractory high entropy alloy

Qing Wang; Jincan Han; Yufeng Liu; Zhongwei Zhang; Chuang Dong; Peter K. Liaw

doi:10.1016/j.scriptamat.2020.08.029

Coherent precipitation and stability of cuboidal nanoparticles in body-centered-cubic Al_0.4Nb_0.5Ta_0.5TiZr_0.8 refractory high entropy alloy

Qing Wang^*, Jincan Han, Yufeng Liu, Zhongwei Zhang, Chuang Dong, Peter K. Liaw

^*Corresponding author for this work

Institute of Advanced Structure Technology

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

64 Citations (Scopus)

Abstract

The present work developed a new body-centered-cubic (BCC)-based Al_0.4Nb_0.5Ta_0.5TiZr_0.8 refractory high entropy alloy with coherent precipitation. The formation of cuboidal nanoprecipitates with a size of 25~50 nm in an 873 K-aged alloy is ascribed to a moderate lattice misfit. A Zr₅Al₃ phase also coexists with B2 in a same particle shape due to similar chemical compositions, in which Ti is enriched in B2 but not in Zr₅Al₃. The BCC/B2 coherency would be deteriorated with increasing the aging temperature, leaving coarse Zr₅Al₃ alone. Besides, there exist two kinds of BCC phases due to the segregations of Nb/Ta and Ti/Zr.

Original language	English
Pages (from-to)	40-45
Number of pages	6
Journal	Scripta Materialia
Volume	190
DOIs	https://doi.org/10.1016/j.scriptamat.2020.08.029
Publication status	Published - 1 Jan 2021

Keywords

Aging
High entropy alloy
Microstructure
Phase transformation
Precipitation

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10.1016/j.scriptamat.2020.08.029

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title = "Coherent precipitation and stability of cuboidal nanoparticles in body-centered-cubic Al0.4Nb0.5Ta0.5TiZr0.8 refractory high entropy alloy",

abstract = "The present work developed a new body-centered-cubic (BCC)-based Al0.4Nb0.5Ta0.5TiZr0.8 refractory high entropy alloy with coherent precipitation. The formation of cuboidal nanoprecipitates with a size of 25~50 nm in an 873 K-aged alloy is ascribed to a moderate lattice misfit. A Zr5Al3 phase also coexists with B2 in a same particle shape due to similar chemical compositions, in which Ti is enriched in B2 but not in Zr5Al3. The BCC/B2 coherency would be deteriorated with increasing the aging temperature, leaving coarse Zr5Al3 alone. Besides, there exist two kinds of BCC phases due to the segregations of Nb/Ta and Ti/Zr.",

keywords = "Aging, High entropy alloy, Microstructure, Phase transformation, Precipitation",

author = "Qing Wang and Jincan Han and Yufeng Liu and Zhongwei Zhang and Chuang Dong and Liaw, {Peter K.}",

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doi = "10.1016/j.scriptamat.2020.08.029",

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T1 - Coherent precipitation and stability of cuboidal nanoparticles in body-centered-cubic Al0.4Nb0.5Ta0.5TiZr0.8 refractory high entropy alloy

AU - Wang, Qing

AU - Han, Jincan

AU - Liu, Yufeng

AU - Zhang, Zhongwei

AU - Dong, Chuang

AU - Liaw, Peter K.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - The present work developed a new body-centered-cubic (BCC)-based Al0.4Nb0.5Ta0.5TiZr0.8 refractory high entropy alloy with coherent precipitation. The formation of cuboidal nanoprecipitates with a size of 25~50 nm in an 873 K-aged alloy is ascribed to a moderate lattice misfit. A Zr5Al3 phase also coexists with B2 in a same particle shape due to similar chemical compositions, in which Ti is enriched in B2 but not in Zr5Al3. The BCC/B2 coherency would be deteriorated with increasing the aging temperature, leaving coarse Zr5Al3 alone. Besides, there exist two kinds of BCC phases due to the segregations of Nb/Ta and Ti/Zr.

AB - The present work developed a new body-centered-cubic (BCC)-based Al0.4Nb0.5Ta0.5TiZr0.8 refractory high entropy alloy with coherent precipitation. The formation of cuboidal nanoprecipitates with a size of 25~50 nm in an 873 K-aged alloy is ascribed to a moderate lattice misfit. A Zr5Al3 phase also coexists with B2 in a same particle shape due to similar chemical compositions, in which Ti is enriched in B2 but not in Zr5Al3. The BCC/B2 coherency would be deteriorated with increasing the aging temperature, leaving coarse Zr5Al3 alone. Besides, there exist two kinds of BCC phases due to the segregations of Nb/Ta and Ti/Zr.

KW - Aging

KW - High entropy alloy

KW - Microstructure

KW - Phase transformation

KW - Precipitation

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DO - 10.1016/j.scriptamat.2020.08.029

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SN - 1359-6462

VL - 190

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JO - Scripta Materialia

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ER -

Coherent precipitation and stability of cuboidal nanoparticles in body-centered-cubic Al_0.4Nb_0.5Ta_0.5TiZr_0.8 refractory high entropy alloy

Abstract

Keywords

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