Developing strong-yet-ductile light-weight medium-entropy alloy via the unusual oxide doping effect

Xia Li; Shaofei Liu; Junhua Luan; Jiang Ju; Bo Xiao; Haibo Ke; Weihuai Wang; Tao Yang

doi:10.1016/j.scriptamat.2024.116141

Developing strong-yet-ductile light-weight medium-entropy alloy via the unusual oxide doping effect

Xia Li
, Shaofei Liu
, Junhua Luan
, Jiang Ju
, Bo Xiao
, Haibo Ke^*
, Weihuai Wang
, Tao Yang^*

^*Corresponding author for this work

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

9 Citations (Scopus)

Abstract

High or medium entropy alloys (M/HEAs) possess outstanding mechanical and thermal properties, but their high mass density severely restricts their practical applications. In this study, we designed a novel light-weight MEA based on the TiAlCrNb-x(ZrO₂) system. These ZrO₂ particles doped can completely dissolve in the β-phase structure of the TiAlCrNb MEA, which contrasts with conventional ceramic strengthening introduced through powder metallurgy. Consequently, it promotes the formation of Ti₃Al nanoparticles and simultaneously substantially reduces grain size, thereby achieving a remarkable strength-ductility combination with a high specific yield strength of 225/250 MPa/(g·cm⁻³) while maintaining an excellent tensile ductility of 19.5/10.1% in the newly designed TiAlCrNb-(1.2/1.5)(ZrO₂) MEAs. This performance outperforms most other light-weight M/HEAs. Strengthened mechanisms analysis indicates that the strength increment is attributed to grain-refinement-induced Hall-Petch strengthening and solid-solution strengthening from the dissolved oxygen. The results offer insight into the innovative design of ultrastrong and ductile light-weight MEAs for advanced structural applications.

© 2024 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved

Original language	English
Article number	116141
Journal	Scripta Materialia
Volume	248
Online published	20 Apr 2024
DOIs	https://doi.org/10.1016/j.scriptamat.2024.116141
Publication status	Published - 15 Jul 2024

Funding

The City University of Hong Kong authors greatly acknowledge the financial support from the Research Grants Council of the Hong Kong Special Administrative Region, China (Grant No. C1020-21G). We also thank the financial support from the Guangdong Major Project of Basic and Applied Basic Research, China (Grant No. 2019B030302010) and the National Natural Science Foundation of China (Grant Nos. 52071222).

Research Keywords

Good ductility
High strength
Light-weight medium entropy alloy
Nano-precipitates
Strengthening mechanism

RGC Funding Information

RGC-funded

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10.1016/j.scriptamat.2024.116141

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title = "Developing strong-yet-ductile light-weight medium-entropy alloy via the unusual oxide doping effect",

abstract = "High or medium entropy alloys (M/HEAs) possess outstanding mechanical and thermal properties, but their high mass density severely restricts their practical applications. In this study, we designed a novel light-weight MEA based on the TiAlCrNb-x(ZrO2) system. These ZrO2 particles doped can completely dissolve in the β-phase structure of the TiAlCrNb MEA, which contrasts with conventional ceramic strengthening introduced through powder metallurgy. Consequently, it promotes the formation of Ti3Al nanoparticles and simultaneously substantially reduces grain size, thereby achieving a remarkable strength-ductility combination with a high specific yield strength of 225/250 MPa/(g·cm−3) while maintaining an excellent tensile ductility of 19.5/10.1\% in the newly designed TiAlCrNb-(1.2/1.5)(ZrO2) MEAs. This performance outperforms most other light-weight M/HEAs. Strengthened mechanisms analysis indicates that the strength increment is attributed to grain-refinement-induced Hall-Petch strengthening and solid-solution strengthening from the dissolved oxygen. The results offer insight into the innovative design of ultrastrong and ductile light-weight MEAs for advanced structural applications. {\textcopyright} 2024 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved",

keywords = "Good ductility, High strength, Light-weight medium entropy alloy, Nano-precipitates, Strengthening mechanism",

author = "Xia Li and Shaofei Liu and Junhua Luan and Jiang Ju and Bo Xiao and Haibo Ke and Weihuai Wang and Tao Yang",

year = "2024",

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doi = "10.1016/j.scriptamat.2024.116141",

language = "English",

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journal = "Scripta Materialia",

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TY - JOUR

T1 - Developing strong-yet-ductile light-weight medium-entropy alloy via the unusual oxide doping effect

AU - Li, Xia

AU - Liu, Shaofei

AU - Luan, Junhua

AU - Ju, Jiang

AU - Xiao, Bo

AU - Ke, Haibo

AU - Wang, Weihuai

AU - Yang, Tao

PY - 2024/7/15

Y1 - 2024/7/15

N2 - High or medium entropy alloys (M/HEAs) possess outstanding mechanical and thermal properties, but their high mass density severely restricts their practical applications. In this study, we designed a novel light-weight MEA based on the TiAlCrNb-x(ZrO2) system. These ZrO2 particles doped can completely dissolve in the β-phase structure of the TiAlCrNb MEA, which contrasts with conventional ceramic strengthening introduced through powder metallurgy. Consequently, it promotes the formation of Ti3Al nanoparticles and simultaneously substantially reduces grain size, thereby achieving a remarkable strength-ductility combination with a high specific yield strength of 225/250 MPa/(g·cm−3) while maintaining an excellent tensile ductility of 19.5/10.1% in the newly designed TiAlCrNb-(1.2/1.5)(ZrO2) MEAs. This performance outperforms most other light-weight M/HEAs. Strengthened mechanisms analysis indicates that the strength increment is attributed to grain-refinement-induced Hall-Petch strengthening and solid-solution strengthening from the dissolved oxygen. The results offer insight into the innovative design of ultrastrong and ductile light-weight MEAs for advanced structural applications. © 2024 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved

AB - High or medium entropy alloys (M/HEAs) possess outstanding mechanical and thermal properties, but their high mass density severely restricts their practical applications. In this study, we designed a novel light-weight MEA based on the TiAlCrNb-x(ZrO2) system. These ZrO2 particles doped can completely dissolve in the β-phase structure of the TiAlCrNb MEA, which contrasts with conventional ceramic strengthening introduced through powder metallurgy. Consequently, it promotes the formation of Ti3Al nanoparticles and simultaneously substantially reduces grain size, thereby achieving a remarkable strength-ductility combination with a high specific yield strength of 225/250 MPa/(g·cm−3) while maintaining an excellent tensile ductility of 19.5/10.1% in the newly designed TiAlCrNb-(1.2/1.5)(ZrO2) MEAs. This performance outperforms most other light-weight M/HEAs. Strengthened mechanisms analysis indicates that the strength increment is attributed to grain-refinement-induced Hall-Petch strengthening and solid-solution strengthening from the dissolved oxygen. The results offer insight into the innovative design of ultrastrong and ductile light-weight MEAs for advanced structural applications. © 2024 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved

KW - Good ductility

KW - High strength

KW - Light-weight medium entropy alloy

KW - Nano-precipitates

KW - Strengthening mechanism

UR - https://www.scopus.com/pages/publications/85190725978

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85190725978&origin=recordpage

U2 - 10.1016/j.scriptamat.2024.116141

DO - 10.1016/j.scriptamat.2024.116141

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 248

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 116141

ER -

Developing strong-yet-ductile light-weight medium-entropy alloy via the unusual oxide doping effect

Abstract

Funding

Research Keywords

RGC Funding Information

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CRF: Competing Deformation Mechanisms of Complex Alloys at Thermomechanical Extremes

Design and Application of Light-weight Titanium-Based Alloys

Cite this

Developing strong-yet-ductile light-weight medium-entropy alloy via the unusual oxide doping effect

Abstract

Funding

Research Keywords

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

CRF: Competing Deformation Mechanisms of Complex Alloys at Thermomechanical Extremes

Student theses

Design and Application of Light-weight Titanium-Based Alloys

Cite this