Overcoming high-temperature strength-ductility trade-off by combination deformation twinning of C11b and D022 superlattices in a Ni-Cr-W/Mo-based superalloy

Xiaolin Li; Yi He; Linxi Liu; Xiangyu Gao; Ke Hua; Haifeng Wang

doi:10.1016/j.scriptamat.2022.114931

Overcoming high-temperature strength-ductility trade-off by combination deformation twinning of C11_b and D0₂₂ superlattices in a Ni-Cr-W/Mo-based superalloy

Xiaolin Li, Yi He, Linxi Liu, Xiangyu Gao, Ke Hua, Haifeng Wang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

8 Scopus citations

Abstract

A Ni-7.9Cr-5.9W-22.2Mo-1.4Ti (wt.%) superalloy was designed and prepared to have simultaneously high densities of nanoscale C11_b and D0₂₂ superlattices within the disordered Ni-based austenite matrix. As a result, both strength and ductility were enhanced significantly at the elevated temperature as compared to the Ni-8Cr-6W-22.5Mo superalloy with only the nanoscale C11_b superlattice. This is ascribed to not only co-existent precipitation strengthening of nanoscale C11_b and D0₂₂ superlattices but also their combination deformation twinning induced strength and plasticity. Such a novel mechanism to overcome high-temperature strength-ductility trade-off would shed some light on designing advanced Ni-based superalloys.

Original language	English
Article number	114931
Journal	Scripta Materialia
Volume	220
DOIs	https://doi.org/10.1016/j.scriptamat.2022.114931
State	Published - Nov 2022

Keywords

C11 superlattice
D0 superlattice
High-temperature deformation twinning
Ni-based superalloys
Partial dislocation slip

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10.1016/j.scriptamat.2022.114931

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title = "Overcoming high-temperature strength-ductility trade-off by combination deformation twinning of C11b and D022 superlattices in a Ni-Cr-W/Mo-based superalloy",

abstract = "A Ni-7.9Cr-5.9W-22.2Mo-1.4Ti (wt.%) superalloy was designed and prepared to have simultaneously high densities of nanoscale C11b and D022 superlattices within the disordered Ni-based austenite matrix. As a result, both strength and ductility were enhanced significantly at the elevated temperature as compared to the Ni-8Cr-6W-22.5Mo superalloy with only the nanoscale C11b superlattice. This is ascribed to not only co-existent precipitation strengthening of nanoscale C11b and D022 superlattices but also their combination deformation twinning induced strength and plasticity. Such a novel mechanism to overcome high-temperature strength-ductility trade-off would shed some light on designing advanced Ni-based superalloys.",

keywords = "C11 superlattice, D0 superlattice, High-temperature deformation twinning, Ni-based superalloys, Partial dislocation slip",

author = "Xiaolin Li and Yi He and Linxi Liu and Xiangyu Gao and Ke Hua and Haifeng Wang",

note = "Publisher Copyright: {\textcopyright} 2022",

year = "2022",

month = nov,

doi = "10.1016/j.scriptamat.2022.114931",

language = "英语",

volume = "220",

journal = "Scripta Materialia",

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TY - JOUR

T1 - Overcoming high-temperature strength-ductility trade-off by combination deformation twinning of C11b and D022 superlattices in a Ni-Cr-W/Mo-based superalloy

AU - Li, Xiaolin

AU - He, Yi

AU - Liu, Linxi

AU - Gao, Xiangyu

AU - Hua, Ke

AU - Wang, Haifeng

PY - 2022/11

Y1 - 2022/11

N2 - A Ni-7.9Cr-5.9W-22.2Mo-1.4Ti (wt.%) superalloy was designed and prepared to have simultaneously high densities of nanoscale C11b and D022 superlattices within the disordered Ni-based austenite matrix. As a result, both strength and ductility were enhanced significantly at the elevated temperature as compared to the Ni-8Cr-6W-22.5Mo superalloy with only the nanoscale C11b superlattice. This is ascribed to not only co-existent precipitation strengthening of nanoscale C11b and D022 superlattices but also their combination deformation twinning induced strength and plasticity. Such a novel mechanism to overcome high-temperature strength-ductility trade-off would shed some light on designing advanced Ni-based superalloys.

AB - A Ni-7.9Cr-5.9W-22.2Mo-1.4Ti (wt.%) superalloy was designed and prepared to have simultaneously high densities of nanoscale C11b and D022 superlattices within the disordered Ni-based austenite matrix. As a result, both strength and ductility were enhanced significantly at the elevated temperature as compared to the Ni-8Cr-6W-22.5Mo superalloy with only the nanoscale C11b superlattice. This is ascribed to not only co-existent precipitation strengthening of nanoscale C11b and D022 superlattices but also their combination deformation twinning induced strength and plasticity. Such a novel mechanism to overcome high-temperature strength-ductility trade-off would shed some light on designing advanced Ni-based superalloys.

KW - C11 superlattice

KW - D0 superlattice

KW - High-temperature deformation twinning

KW - Ni-based superalloys

KW - Partial dislocation slip

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U2 - 10.1016/j.scriptamat.2022.114931

DO - 10.1016/j.scriptamat.2022.114931

M3 - 文章

AN - SCOPUS:85134185727

SN - 1359-6462

VL - 220

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 114931

ER -

Overcoming high-temperature strength-ductility trade-off by combination deformation twinning of C11_b and D0₂₂ superlattices in a Ni-Cr-W/Mo-based superalloy

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Keywords

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