Simultaneously enhancing strength, ductility, and electrical conductivity in Cu-1Cr-0.1Zr alloy by heterogeneous microstructure

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2024-10-28 DOI:10.1016/j.msea.2024.147473

Zhu Qi Chu , Zhen Fan , Wei Wei , Kun Xia Wei , Igor V. Alexandrov , Xu Long An , Dan Dan Wang , Xiang Kui Liu

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引用次数: 0

Abstract

A novel layered heterogeneous microstructure, exhibiting a multiscale distribution of grain sizes and structural features, including nanocrystalline (NC), nanotwins (NT), nanoscale precipitates (NP), submicron crystalline (SC) and microcrystalline (MC), was successfully fabricated within the Cu-1Cr-0.1Zr alloy via solid solution (SS) treatment, aging treatment (AT), cold rolling (CR), and annealing treatment. The heterogeneous microstructure of the Cu-1Cr-0.1Zr alloy exhibits excellent strength, ductility, and electrical conductivity, mainly due to the synergistic effects between multi-scale grains formed during deformation, leading to significant hetero-deformation induced (HDI) stress and the Bauschinger effect, which simultaneously improves strength and ductility. Interestingly, annealing treatment to form recrystallized grain, SC and MC can improve electrical conductivity. This study provides an effective way to achieve synergistic effects between significant strength, good ductility, and remarkable electrical conductivity in copper alloys.

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通过异质微观结构同时提高 Cu-1Cr-0.1Zr 合金的强度、延展性和导电性

通过固溶（SS）处理、时效处理（AT）、冷轧（CR）和退火处理，成功地在 Cu-1Cr-0.1Zr 合金中制造出了一种新型的分层异质微观结构，它呈现出晶粒大小和结构特征的多尺度分布，包括纳米晶（NC）、纳米孪晶（NT）、纳米级沉淀（NP）、亚微米晶（SC）和微晶（MC）。Cu-1Cr-0.1Zr 合金的异质微观结构具有优异的强度、延展性和导电性，这主要是由于在变形过程中形成的多尺度晶粒之间的协同效应，导致显著的异质变形诱导应力（HDI）和鲍辛格效应，从而同时提高了强度和延展性。有趣的是，通过退火处理形成再结晶晶粒、SC 和 MC 可以提高导电性。这项研究为在铜合金中实现显著的强度、良好的延展性和出色的导电性之间的协同效应提供了有效途径。

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.