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<p>Low carbon steel (LCS) samples in a hot-rolled condition were processed by Equal Channel Angular Pressing (ECAP). The first group of samples was processed using route A up to three passes, while the second group received one pass of route A and a second pass via route C, the channel angle was 120&#xa0;°C. The ECAP-induced microstructures were investigated using Field Emission Microscopy and X-Ray Diffraction. The hardness, compression, and wear resistance of the ECAPed samples were tested to assess the influence of ECAP on the mechanical properties. X-ray patterns showed broader reflections in the case of ECAPed samples, indicating the formation of nonequilibrium structures. Severe deformation via ECAP reduced ferrite grain size, gradually fragmented the pearlite, and increased its surface area %. The hardness of LCS increased from ~ 210 to 280&#xa0;HV after the samples received two passes of ECAP (A/C) and to 317&#xa0;HV after three passes A. Yield strength increased from ~ 800 to 1000&#xa0;MPa after three passes of ECAP (route A) or two passes route C. The wear resistance of the ECAPed samples decreased despite the increase in hardness due to ECAP-induced brittleness in the prepared samples. Using the results of Abbott Firestone analysis, a connection between surface texture and phase content in the ECAPed samples was established. Based on the results, route C represents the optimal deformation condition, as it enhances the strength while maintaining good resistance to wear.</p>

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Studying Pearlite Fragmentation and Mechanical Properties of ECAPed Low-Carbon Steel Using the Abbott Firestone Technique

  • 期刊论文

  • 发表日期：

    2025年8月11日

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  • Berrou Brahim,
  • Mebarek Abdelmalek,
  • Lemoui Abdennacer,
  • Ahmed I. Z. Farahat,
  • Shimaa EL-Hadad

摘要

Low carbon steel (LCS) samples in a hot-rolled condition were processed by Equal Channel Angular Pressing (ECAP). The first group of samples was processed using route A up to three passes, while the second group received one pass of route A and a second pass via route C, the channel angle was 120 °C. The ECAP-induced microstructures were investigated using Field Emission Microscopy and X-Ray Diffraction. The hardness, compression, and wear resistance of the ECAPed samples were tested to assess the influence of ECAP on the mechanical properties. X-ray patterns showed broader reflections in the case of ECAPed samples, indicating the formation of nonequilibrium structures. Severe deformation via ECAP reduced ferrite grain size, gradually fragmented the pearlite, and increased its surface area %. The hardness of LCS increased from ~ 210 to 280 HV after the samples received two passes of ECAP (A/C) and to 317 HV after three passes A. Yield strength increased from ~ 800 to 1000 MPa after three passes of ECAP (route A) or two passes route C. The wear resistance of the ECAPed samples decreased despite the increase in hardness due to ECAP-induced brittleness in the prepared samples. Using the results of Abbott Firestone analysis, a connection between surface texture and phase content in the ECAPed samples was established. Based on the results, route C represents the optimal deformation condition, as it enhances the strength while maintaining good resistance to wear.