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<p>The present study reports the deposition of modified martensitic stainless steel on AISI 4140 steel by laser surface cladding (LSC) to improve the tribological properties, especially sliding wear resistance at room and elevated temperatures (up to 400&#xa0;°C). Optimization of the LSC process parameters through locally designed experiments and response surface methodology leads to optimal values of output responses—hardness, compositional dilution levels, and clad thickness. Extensive microstructural, compositional, and phase aggregate analysis coupled with surface mechanical property evaluation allowed a detailed understanding of the structure-property correlation. The observed significant improvement in hardness (by ~ 100 pct) and sliding wear resistance (by ~ 100 and 50 pct at 25&#xa0;°C and 400&#xa0;°C, respectively) is attributed to the defect-free clad comprising precipitates of complex chromium-rich carbides embedded in the interdendritic spaces.</p> Graphical Abstract <p></p>

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High-Temperature Sliding Wear Behavior of Laser Clad Martensitic Stainless Steel on AISI 4140 Steel

  • 期刊论文

  • 发表日期：

    2025年8月25日

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  • Nikita Mohite,
  • Gayatri Paul,
  • Indranil Manna

摘要

The present study reports the deposition of modified martensitic stainless steel on AISI 4140 steel by laser surface cladding (LSC) to improve the tribological properties, especially sliding wear resistance at room and elevated temperatures (up to 400 °C). Optimization of the LSC process parameters through locally designed experiments and response surface methodology leads to optimal values of output responses—hardness, compositional dilution levels, and clad thickness. Extensive microstructural, compositional, and phase aggregate analysis coupled with surface mechanical property evaluation allowed a detailed understanding of the structure-property correlation. The observed significant improvement in hardness (by ~ 100 pct) and sliding wear resistance (by ~ 100 and 50 pct at 25 °C and 400 °C, respectively) is attributed to the defect-free clad comprising precipitates of complex chromium-rich carbides embedded in the interdendritic spaces.

Graphical Abstract