Enhancement of strength-ductility synergy in ultrafine-grained Cu-Zn alloy prepared by ECAP and subsequent annealing

Jianqing Chen; Yehan Su; Qiyu Zhang; Jiapeng Sun; Donghui Yang; Jinghua Jiang; Dan Song; Aibin Ma

Journal of Materials Research and Technology (Mar 2022)

Enhancement of strength-ductility synergy in ultrafine-grained Cu-Zn alloy prepared by ECAP and subsequent annealing

Jianqing Chen,
Yehan Su,
Qiyu Zhang,
Jiapeng Sun,
Donghui Yang,
Jinghua Jiang,
Dan Song,
Aibin Ma

Affiliations

Jianqing Chen: College of Mechanics and Materials, Hohai University, Nanjing 211100, China; Corresponding author.
Yehan Su: College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Qiyu Zhang: College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Jiapeng Sun: College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Donghui Yang: College of Mechanics and Materials, Hohai University, Nanjing 211100, China; Suqian Research Institute, Hohai University, Suqian 223800, China
Jinghua Jiang: College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Dan Song: College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Aibin Ma: College of Mechanics and Materials, Hohai University, Nanjing 211100, China; Suqian Research Institute, Hohai University, Suqian 223800, China; Corresponding author.

Journal volume & issue: Vol. 17
pp. 433 – 440

Abstract

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A homogeneously ultrafine-grained (UFG) Cu-38 Zn alloy with an average grain size of 0.64 μm is successfully fabricated by equal channel angular processing (ECAP), which exhibits a significantly enhanced strength-ductility synergy. The strength enhancement can be attributed to grain refinement and dislocation strengthening. After annealing the ECAP processed alloy at 300 °C for 30 min, a further enhanced strength with almost unchanged ductility was achieved. This unusual annealing strengthens is associated with the solute/impurity segregation and precipitations inside the grains.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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