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<p>Employing high-damping steels is advantageous for applications that require vibration and noise reduction. However, the intrinsic tradeoff between strength and damping limits their use in load-bearing applications. Previous studies established processing pathways to overcome this tradeoff, <i>e.g.</i>, through partial recrystallization, but these approaches are unsuitable to be scaled up for thick-section plates. To address this challenge, we employed the CALPHAD-based genomic design framework to develop a precipitation-strengthened, high-strength, high-damping steel compatible with thick-section manufacturing processes. Experimental findings on a fully homogenized and solution-treated Fe–Mn–Nb–C design prototype confirmed that the employed precipitation-strengthening strategy enhances the strength of the alloy by 60&#xa0;pct, while preserving its damping performance at low oscillation strain amplitudes (&lt;&#xa0;0.03 pct). Further, we applied the Richman-Bolling technique to conduct a thermomechanical assessment of a high-damping Fe–Mn prototype alloy, confirming the employed strengthening approach. The presented findings, beyond providing other insights, establish genomic design as a promising pathway for developing high-damping steels deployable for thick-section load-bearing applications.</p> Graphic abstract <p></p>

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A CALPHAD-Based Precipitation-Strengthened Alloy Design Study for Thick-Section High-Strength High-Damping Steels

  • 期刊论文

  • 发表日期：

    2026年5月25日

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  • J. Rackwitz,
  • C. C. Tasan,
  • G. B. Olson

摘要

Employing high-damping steels is advantageous for applications that require vibration and noise reduction. However, the intrinsic tradeoff between strength and damping limits their use in load-bearing applications. Previous studies established processing pathways to overcome this tradeoff, e.g., through partial recrystallization, but these approaches are unsuitable to be scaled up for thick-section plates. To address this challenge, we employed the CALPHAD-based genomic design framework to develop a precipitation-strengthened, high-strength, high-damping steel compatible with thick-section manufacturing processes. Experimental findings on a fully homogenized and solution-treated Fe–Mn–Nb–C design prototype confirmed that the employed precipitation-strengthening strategy enhances the strength of the alloy by 60 pct, while preserving its damping performance at low oscillation strain amplitudes (< 0.03 pct). Further, we applied the Richman-Bolling technique to conduct a thermomechanical assessment of a high-damping Fe–Mn prototype alloy, confirming the employed strengthening approach. The presented findings, beyond providing other insights, establish genomic design as a promising pathway for developing high-damping steels deployable for thick-section load-bearing applications.

Graphic abstract