Scholarlink

<p>This study investigates the influence of a novel hybrid surface treatment combining wire brush hammering and electropolishing (EP), compared to traditional mechanical polishing (MP) also combined with electropolishing, on the surface integrity and tribological performance of AISI 316L stainless steel manufactured by laser powder bed fusion (LPBF). Optimized wire brush hammering parameters (10 passes) achieved a superior balance between topographical refinement and intense mechanical strengthening, reducing Ra and Rt by 86% and 83%, respectively, while MP achieved similar roughness reduction but with significantly less subsurface impact. Results reveal that wire brush hammering induces a deep work-hardened layer (≈ 200&#xa0;μm) with a peak microhardness of 616&#xa0;HV (+ 224%) and high compressive residual stresses (− 744&#xa0;MPa). In contrast, MP resulted in a much shallower hardened layer (&lt; 30&#xa0;μm) and lower compressive stresses (≈ − 150&#xa0;MPa). Tribological tests demonstrate that wire brush hammering triggers a fundamental transition in wear mechanisms, triggering a transition in wear mechanisms from severe adhesive-oxidative wear to mild abrasive wear, resulting in a 68% reduction in wear volume, far outperforming the 21% reduction achieved by MP. Subsequent electropolishing achieved mirror-like surface smoothing while successfully preserving a substantial fraction of the subsurface mechanical benefits induced by wire brush hammering. This hybrid approach establishes wire brush hammering-based treatments as an effective, cost-efficient, and industrially scalable strategy for enhancing the durability of additively manufactured components.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Post-processing of Additive Manufactured AISI 316L: Surface Integrity and Performance Improvements

  • 期刊论文

  • 发表日期：

    2026年6月22日

查看全文
  • Mannena Sahraoui,
  • Houda Yahyaoui,
  • Naoufel Ben Moussa,
  • Mohamed Habibi,
  • Chedly Braham

摘要

This study investigates the influence of a novel hybrid surface treatment combining wire brush hammering and electropolishing (EP), compared to traditional mechanical polishing (MP) also combined with electropolishing, on the surface integrity and tribological performance of AISI 316L stainless steel manufactured by laser powder bed fusion (LPBF). Optimized wire brush hammering parameters (10 passes) achieved a superior balance between topographical refinement and intense mechanical strengthening, reducing Ra and Rt by 86% and 83%, respectively, while MP achieved similar roughness reduction but with significantly less subsurface impact. Results reveal that wire brush hammering induces a deep work-hardened layer (≈ 200 μm) with a peak microhardness of 616 HV (+ 224%) and high compressive residual stresses (− 744 MPa). In contrast, MP resulted in a much shallower hardened layer (< 30 μm) and lower compressive stresses (≈ − 150 MPa). Tribological tests demonstrate that wire brush hammering triggers a fundamental transition in wear mechanisms, triggering a transition in wear mechanisms from severe adhesive-oxidative wear to mild abrasive wear, resulting in a 68% reduction in wear volume, far outperforming the 21% reduction achieved by MP. Subsequent electropolishing achieved mirror-like surface smoothing while successfully preserving a substantial fraction of the subsurface mechanical benefits induced by wire brush hammering. This hybrid approach establishes wire brush hammering-based treatments as an effective, cost-efficient, and industrially scalable strategy for enhancing the durability of additively manufactured components.