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Abstract <p>This study investigates the impact of Equal Channel Angular Pressing (ECAP) on Cu–TiB<sub>2</sub> composites, focusing on microstructural and mechanical properties. ECAP was performed at room temperature, 200, and 500&#xa0;°C on Cu-based composites with varying TiB<sub>2</sub> contents of 2.5, 5, 7.5, and 10%. Pure Cu and TiB<sub>2</sub> powders were mixed by high-energy ball milling and processed via ECAP. Microstructural analysis through optical microscopy, field emission gun–scanning electron microscope (FEG-SEM), and electron backscatter diffraction (EBSD) showed uniform TiB<sub>2</sub> particle distribution in the Cu matrix with minimal deformation. X-ray diffraction (XRD) and crystallographic texture were linked with microstructural changes to work-hardening behavior. ECAP significantly reduced Cu grain size and improved composite hardness, with greater TiB<sub>2</sub> content and higher processing temperatures enhancing microhardness. Adding TiB<sub>2</sub> to Cu enhances mechanical properties, especially at elevated temperatures. ECAP processing of Cu–TiB<sub>2</sub> composites at varying temperatures results in uniform TiB<sub>2</sub> distribution. Higher consolidation temperatures also led to increased ductility and shear deformation. The findings suggest ECAP is effective for creating ultrafine-grained Cu–TiB<sub>2</sub> composites with superior mechanical properties. The Cu–TiB<sub>2</sub> composites with different percentages of reinforcements (TiB<sub>2</sub>) and processing temperatures were compared in terms of their hardness, strength, wear resistance and microstructures. The changes in crystallographic texture improvised by the temperature and size of TiB<sub>2</sub> particles have also been studied.</p> Graphical Abstract <p></p>

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Influence of Reinforcement and Processing Temperature on the Microstructure and Texture Evolution of Cu–TiB2 Composite Processed by Equal Channel Angular Pressing

  • 期刊论文

  • 发表日期：

    2025年4月19日

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  • Uttam Kumar Murmu,
  • Prerona Saha,
  • Abhishek Ghosh,
  • Srijan Yadav,
  • B. Ravisankar,
  • Asiful H. Seikh,
  • Ibrahim A. Alnaser,
  • Manojit Ghosh

摘要

Abstract

This study investigates the impact of Equal Channel Angular Pressing (ECAP) on Cu–TiB2 composites, focusing on microstructural and mechanical properties. ECAP was performed at room temperature, 200, and 500 °C on Cu-based composites with varying TiB2 contents of 2.5, 5, 7.5, and 10%. Pure Cu and TiB2 powders were mixed by high-energy ball milling and processed via ECAP. Microstructural analysis through optical microscopy, field emission gun–scanning electron microscope (FEG-SEM), and electron backscatter diffraction (EBSD) showed uniform TiB2 particle distribution in the Cu matrix with minimal deformation. X-ray diffraction (XRD) and crystallographic texture were linked with microstructural changes to work-hardening behavior. ECAP significantly reduced Cu grain size and improved composite hardness, with greater TiB2 content and higher processing temperatures enhancing microhardness. Adding TiB2 to Cu enhances mechanical properties, especially at elevated temperatures. ECAP processing of Cu–TiB2 composites at varying temperatures results in uniform TiB2 distribution. Higher consolidation temperatures also led to increased ductility and shear deformation. The findings suggest ECAP is effective for creating ultrafine-grained Cu–TiB2 composites with superior mechanical properties. The Cu–TiB2 composites with different percentages of reinforcements (TiB2) and processing temperatures were compared in terms of their hardness, strength, wear resistance and microstructures. The changes in crystallographic texture improvised by the temperature and size of TiB2 particles have also been studied.

Graphical Abstract