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<p>This study systematically investigates the influence of cold rolling on the damping properties of Fe-Mn-based alloys. Four alloys with different compositions were selected: 1# (Fe-19Mn), 2# (Fe-19Mn-8Cr), 3# (Fe-19Mn-8Cr-1Co) and 4# (Fe-19Mn-8Cr-1Co-0.2Si). After solution treatment at 1050&#xa0;°C for 30&#xa0;min, cold rolling was performed at reductions of 20%, 40%, and 60%. The microstructural evolution was analyzed using OM, SEM, EBSD, and XRD, and correlated with damping performance. The 1# alloy, with ~ 70% initial ε-martensite, exhibited severe dislocation entanglement after 40% cold rolling, leading to reduced damping. In contrast, the Cr-containing alloys (2#, 3#, 4#) showed improved damping after 40% cold rolling due to strain-induced ε-martensite transformation and increased lattice defects, with the 2# alloy showing the greatest improvement. For the 3# alloy, optimal damping was achieved at 20% reduction; further rolling diminished gains due to increased α′-martensite and structural interweaving. Critically, this work overcomes the traditional inhibitory effect of Cr on damping capacity through composition-process synergy. By optimizing the rolling process, the 3# alloy after 20% reduction achieved damping superior to that of the Cr-free 1# alloy in the solution-treated state, marking the first realization of synergistic improvement in corrosion resistance and damping performance in Cr-containing Fe-Mn-based alloys. This study establishes the “20% reduction rate” as an optimized process window for Cr-containing alloys, providing critical guidance for developing structural–functional integrated materials for high-end equipment vibration control.</p>

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Microstructure Evolution and Damping Performance Response of Cold-Rolled Fe-Mn-Based Alloys

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • Mingming Pan,
  • Bingdong Wang,
  • Chi Zhang,
  • Zifu Wang,
  • Lei Hou,
  • Xiaogao Dai

摘要

This study systematically investigates the influence of cold rolling on the damping properties of Fe-Mn-based alloys. Four alloys with different compositions were selected: 1# (Fe-19Mn), 2# (Fe-19Mn-8Cr), 3# (Fe-19Mn-8Cr-1Co) and 4# (Fe-19Mn-8Cr-1Co-0.2Si). After solution treatment at 1050 °C for 30 min, cold rolling was performed at reductions of 20%, 40%, and 60%. The microstructural evolution was analyzed using OM, SEM, EBSD, and XRD, and correlated with damping performance. The 1# alloy, with ~ 70% initial ε-martensite, exhibited severe dislocation entanglement after 40% cold rolling, leading to reduced damping. In contrast, the Cr-containing alloys (2#, 3#, 4#) showed improved damping after 40% cold rolling due to strain-induced ε-martensite transformation and increased lattice defects, with the 2# alloy showing the greatest improvement. For the 3# alloy, optimal damping was achieved at 20% reduction; further rolling diminished gains due to increased α′-martensite and structural interweaving. Critically, this work overcomes the traditional inhibitory effect of Cr on damping capacity through composition-process synergy. By optimizing the rolling process, the 3# alloy after 20% reduction achieved damping superior to that of the Cr-free 1# alloy in the solution-treated state, marking the first realization of synergistic improvement in corrosion resistance and damping performance in Cr-containing Fe-Mn-based alloys. This study establishes the “20% reduction rate” as an optimized process window for Cr-containing alloys, providing critical guidance for developing structural–functional integrated materials for high-end equipment vibration control.