Achieving novel copper-steel joints with a combination of high strength and ductility reinforced by in-situ Fe-rich particles

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外文摘要：Strength and ductility are typically mutually exclusive in traditional copper-steel joints.This work pro-poses a strategy to overcome the inherent trade-off between strength and ductility through high speed electron beam welding with a preferred deflection to facilitate the in-situ formation of Fe-rich particles in the Cu matrix.The Fe-rich particles with an average diameter of 178.5 nm feature a 3D spatial network distribution across practically the entire joint.The obtained joint reinforced with such Fe-rich particles achieves ultimate high tensile strength(413 MPa)while maintaining excellent ductility(22％).The im-proved strength of the copper-steel joint is derived from the combined effects of dislocation strengthen-ing and grain refinement strengthening,while the increase in room-temperature ductility is mainly due to the high Schmid factor up to 0.454,which promotes the primary slip system to initiate easily during tensile deformation.This work provides a novel perspective on creating copper-steel joints in terms of achieving microstructural refinement and outstanding strength-ductility synergy.

外文关键词：

Copper-steel jointsIn-situ Fe-rich particles3D spatial network-microstructureElectron beam welding

作者：

Wu-Qingliang Peng、Qiang Li、Yu-Ping Xu、Hai-Shan Zhou、Guang-Nan Luo

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作者单位：

Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China

University of Science and Technology of China,Hefei 230026,China

基金：

National MCF Energy Research and Development Program of China国家自然科学基金Youth Innovation Promotion Association CAS

项目编号：

2022YFE031400031219228315117008038

出版年：

2024

DOI：

10.1016/j.jmst.2023.09.036

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCD

影响因子：0.657

ISSN：1005-0302

年,卷(期)：2024.182(15)

参考文献量76