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Microstructure and Properties of Cu-0.4 wt.% Al2O3 Composites Fabricated by Hot Extrusion and Cold Drawing

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Abstract

In the present study, Cu-0.4 wt.% Al2O3 composites were successfully prepared by internal oxidation and hot extrusion followed by cold drawing. Microstructure, texture, mechanical properties and electrical conductivity of the Cu-0.4 wt.% Al2O3 composites were systematically studied. Our results show that the cold drawn S2 sample contains a much finer grain (about 1 μm) than the extruded S1 sample (about 3 μm). The S1 and S2 samples have a typical double fiber texture, with <100> and <111> parallel to extrusion direction (ED) or drawing direction (DD). The ultimate tensile strength, tensile yield strength and electrical conductivity of S1 sample are 460 MPa, 375 MPa and 90% IACS, respectively. After cold drawing, the S2 sample possesses a higher ultimate tensile strength (560 MPa) and tensile yield strength (520 MPa) than S1 sample, but a slightly lower electrical conductivity (87.5% IACS) than S1 sample. After annealing at 900 °C, the S1 and S2 samples also have a high microhardness of about 125 HV, which indicates that the Cu-0.4 wt.% Al2O3 composites have an excellent thermal stability.

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Acknowledgments

This study is supported by Guangdong Major Project of Basic and Applied Basic Research (2020B0301030006) and Guangdong Academy of Science Fund (2020GDASYL-20200101001) and National Natural Science Foundation of China (51905111) and Open Fund of National Joint Engineering Research Center for abrasion control and molding of metal materials (HKDNM2019022) and Key Area Research and Development Program of Guangdong Province (2019B010940001).

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Authors and Affiliations

  1. National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials, Henan University of Science and Technology, Luoyang, 471003, China

    Xiaowei Feng & Bo Feng

  2. Guangdong Key Laboratory of Metal Toughening Technology and Application, Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou, 510650, China

    Xiaowei Feng, Dongping Zhang, Bo Feng, Yingfei Lin, Juan Wang & Kaihong Zheng

  3. Kunming University of Science and Technology, Kunming, 650093, China

    Dongping Zhang

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  1. Xiaowei Feng
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Correspondence to Bo Feng.

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Feng, X., Zhang, D., Feng, B. et al. Microstructure and Properties of Cu-0.4 wt.% Al2O3 Composites Fabricated by Hot Extrusion and Cold Drawing. J. of Materi Eng and Perform 31, 1241–1249 (2022). https://doi.org/10.1007/s11665-021-06247-5

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  • DOI: https://doi.org/10.1007/s11665-021-06247-5

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