Abnormally high work hardening ability and excellent comprehensive properties of copper alloys due to multiple twins and precipitates

Yijie Ban; Meng Zhou; Yi Zhang; Yanlin Jia; Yong Pang; Yunzhang Li; Shunlong Tang; Xu Li; Alex A. Volinsky; Ekaterina S. Marchenko

Materials & Design (Apr 2023)

Abnormally high work hardening ability and excellent comprehensive properties of copper alloys due to multiple twins and precipitates

Yijie Ban,
Meng Zhou,
Yi Zhang,
Yanlin Jia,
Yong Pang,
Yunzhang Li,
Shunlong Tang,
Xu Li,
Alex A. Volinsky,
Ekaterina S. Marchenko

Affiliations

Yijie Ban: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China
Meng Zhou: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China; Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang 471023, PR China; Henan Key Laboratory of Nonferrous Materials Science and Processing Technology, Luoyang 471023, PR China
Yi Zhang: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China; Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang 471023, PR China; Henan Key Laboratory of Nonferrous Materials Science and Processing Technology, Luoyang 471023, PR China; Corresponding authors at: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China (Y. Zhang).
Yanlin Jia: School of Materials Science and Engineering, Central South University, Changsha 410083, PR China
Yong Pang: School of Materials Science and Engineering, Central South University, Changsha 410083, PR China; Corresponding authors at: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China (Y. Zhang).
Yunzhang Li: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China
Shunlong Tang: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, PR China
Xu Li: Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, PR China
Alex A. Volinsky: Department of Mechanical Engineering, University of South Florida, 4202 E. Fowler Ave. ENG030, Tampa 33620, USA; Laboratory of Superelastic Biointerfaces, National Research Tomsk State University, 36 Lenin Ave., Tomsk 634050, Russia
Ekaterina S. Marchenko: Laboratory of Superelastic Biointerfaces, National Research Tomsk State University, 36 Lenin Ave., Tomsk 634050, Russia

Journal volume & issue: Vol. 228
p. 111819

Abstract

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In the present work, the Cu-1.35Ni-1Co-0.55Si alloy with multiple twins and ultra-low interfacial mismatch precipitates was obtained by liquid nitrogen dynamic plastic deformation (DPD) and aging treatment. It has abnormally high work hardening ability, which is more than twice that of the previous DPD treatment without aging. In addition, it has excellent comprehensive properties, and its strength, electrical conductivity, and elongation are 816.4 MPa, 40.2% IACS and 11.3% respectively. The fine multiple twins do not coarsen significantly during peak aging, and the dispersed nano precipitates (∼3 nm) further enhance the strength of the Cu-Ni-Co-Si alloy. In addition, the low interfacial mismatch strain between the precipitates and the matrix also ensures adequate elongation. The Cu-Ni-Co-Si alloy has high strength, electrical conductivity, and ductility under the simultaneous action of various mechanisms (grain boundary strengthening, precipitation strengthening, dislocation strengthening and stacking faults). This strategy paves a new avenue for developing precipitation-strengthened alloys with excellent comprehensive properties.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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