Ductilization of 2.6-GPa alloys via short-range ordered interfaces and supranano precipitates

Yong-Qiang Yan; Wen-Hao Cha; Sida Liu; Yan Ma; Jun-Hua Luan; Ziyuan Rao; Chang Liu; Zhi-Wei Shan; Jian Lu; Ge Wu

doi:10.1126/science.adr4917

Ductilization of 2.6-GPa alloys via short-range ordered interfaces and supranano precipitates

Yong-Qiang Yan, Wen-Hao Cha, Sida Liu, Yan Ma, Jun-Hua Luan, Ziyuan Rao, Chang Liu, Zhi-Wei Shan, Jian Lu^*, Ge Wu

^*Corresponding author for this work

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

55 Citations (Scopus)

Abstract

Higher strength and higher ductility are desirable for structural materials. However, ultrastrong alloys inevitably show decreased strain-hardening capacity, limiting their uniform elongation. We present a supranano (<10 nanometers) and short-range ordering design for grain interiors and grain boundary regions, respectively, in fine-grained alloys based on vanadium, cobalt, and nickel, with additions of tungsten, copper, aluminum, and boron. The pronounced grain boundary–related strengthening and ductilization mechanism is realized through segregation of the short-range ordering near the grain boundary. Furthermore, the supranano ordering with a larger size has an enhanced pinning effect for dislocations and stacking faults, multiplied and accumulated in grain interiors during plastic deformation. These mechanisms promote continuously increased flow stress until fracture of the alloy at 10% strain with 2.6-gigapascal tensile stress.

© 2025 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.

Original language	English
Pages (from-to)	401-406
Number of pages	6
Journal	Science
Volume	387
Issue number	6732
Online published	23 Jan 2025
DOIs	https://doi.org/10.1126/science.adr4917
Publication status	Published - 24 Jan 2025

Funding

We acknowledge supports from National Natural Science Foundation of China (52361165617, 52371162, 52271114, and 52401216) and National Natural Science Foundation of China/Hong Kong Research Grants Council Joint Research Scheme (project no. N_CityU151/23). G.W. and C.L. acknowledge supports from National Natural Science Fund for Excellent Young Scientists Fund Program (Overseas). We acknowledge supports from CityU (grant 9360161) for APT research at the Inter-University 3D APT Unit of City University of Hong Kong (CityU). We acknowledge DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities. Parts of this research were carried out at PETRA III beamline P02.1. Beamtime was allocated for proposal I-20230050.

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NSFC: Bulk Complex Concentrated Alloys Based on Grain Boundary Complexion Engineering and Study of Their Toughening Mechanisms
LU, J. (Principal Investigator / Project Coordinator) & WU, G. (Co-Investigator)
1/01/24 → …
Project: Research
ResFac: Inter-University 3D Atom Probe Tomography Unit
KAI, J.-J. (Principal Investigator / Project Coordinator)
7/06/17 → …
Project: Research

Supranano engineering enhances strength and ductility of structural materials at CityUHK
LU, J. & LUAN, J.
24/01/25
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Cite this

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title = "Ductilization of 2.6-GPa alloys via short-range ordered interfaces and supranano precipitates",

abstract = "Higher strength and higher ductility are desirable for structural materials. However, ultrastrong alloys inevitably show decreased strain-hardening capacity, limiting their uniform elongation. We present a supranano (<10 nanometers) and short-range ordering design for grain interiors and grain boundary regions, respectively, in fine-grained alloys based on vanadium, cobalt, and nickel, with additions of tungsten, copper, aluminum, and boron. The pronounced grain boundary–related strengthening and ductilization mechanism is realized through segregation of the short-range ordering near the grain boundary. Furthermore, the supranano ordering with a larger size has an enhanced pinning effect for dislocations and stacking faults, multiplied and accumulated in grain interiors during plastic deformation. These mechanisms promote continuously increased flow stress until fracture of the alloy at 10% strain with 2.6-gigapascal tensile stress.{\textcopyright} 2025 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.",

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T1 - Ductilization of 2.6-GPa alloys via short-range ordered interfaces and supranano precipitates

AU - Yan, Yong-Qiang

AU - Cha, Wen-Hao

AU - Liu, Sida

AU - Ma, Yan

AU - Luan, Jun-Hua

AU - Rao, Ziyuan

AU - Liu, Chang

AU - Shan, Zhi-Wei

AU - Lu, Jian

AU - Wu, Ge

PY - 2025/1/24

Y1 - 2025/1/24

N2 - Higher strength and higher ductility are desirable for structural materials. However, ultrastrong alloys inevitably show decreased strain-hardening capacity, limiting their uniform elongation. We present a supranano (<10 nanometers) and short-range ordering design for grain interiors and grain boundary regions, respectively, in fine-grained alloys based on vanadium, cobalt, and nickel, with additions of tungsten, copper, aluminum, and boron. The pronounced grain boundary–related strengthening and ductilization mechanism is realized through segregation of the short-range ordering near the grain boundary. Furthermore, the supranano ordering with a larger size has an enhanced pinning effect for dislocations and stacking faults, multiplied and accumulated in grain interiors during plastic deformation. These mechanisms promote continuously increased flow stress until fracture of the alloy at 10% strain with 2.6-gigapascal tensile stress.© 2025 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.

AB - Higher strength and higher ductility are desirable for structural materials. However, ultrastrong alloys inevitably show decreased strain-hardening capacity, limiting their uniform elongation. We present a supranano (<10 nanometers) and short-range ordering design for grain interiors and grain boundary regions, respectively, in fine-grained alloys based on vanadium, cobalt, and nickel, with additions of tungsten, copper, aluminum, and boron. The pronounced grain boundary–related strengthening and ductilization mechanism is realized through segregation of the short-range ordering near the grain boundary. Furthermore, the supranano ordering with a larger size has an enhanced pinning effect for dislocations and stacking faults, multiplied and accumulated in grain interiors during plastic deformation. These mechanisms promote continuously increased flow stress until fracture of the alloy at 10% strain with 2.6-gigapascal tensile stress.© 2025 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.

U2 - 10.1126/science.adr4917

DO - 10.1126/science.adr4917

M3 - RGC 21 - Publication in refereed journal

SN - 0036-8075

VL - 387

SP - 401

EP - 406

JO - Science

JF - Science

IS - 6732

ER -

Ductilization of 2.6-GPa alloys via short-range ordered interfaces and supranano precipitates

Abstract

Funding

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Projects

NSFC: Bulk Complex Concentrated Alloys Based on Grain Boundary Complexion Engineering and Study of Their Toughening Mechanisms

ResFac: Inter-University 3D Atom Probe Tomography Unit

Press/Media

Supranano engineering enhances strength and ductility of structural materials at CityUHK

Cite this