Scholarlink

<p>Surface micro-textures have been known to improve the tribological properties through the reduction of contact area and encouragement of lubricants entrapment. This study investigates and compares homothetic (dimple and channel) and hybrid (dimple with channel) laser-induced micro-textures on SS316L surfaces with the aim of increasing frictional efficiency in dry running conditions. A custom-developed quadrant-based indexing scheme was developed to ensure accurate and repeatable texturing across the full circular disc. Taguchi’s robust design approach, with the addition of ANOVA and Grey Relational Analysis (GRA), was utilized for multi-response optimization of laser attributes, with optimal values of 27 W laser power, 60&#xa0;kHz frequency, and 1500&#xa0;mm/s scanning velocity determined. A Ti–sapphire nanosecond pulsed laser was utilized to generate the textures with high geometric fidelity. The homothetic and hybrid track carrying discs were tested using the pin-on-disc method with variable loads and speeds. Homothetic dimples performed better, realizing efficient wear and minimizing friction with effective holding of the lubricant and stable contact. Conversely, the 0°-oriented hybrid textures showed high friction and wear because of ploughing of the edge and fragmentation of the lubrication film. Results from SEM–EDS analysis confirmed uniform surface composition (Fe ~ 66%, Cr ~ 16%, Ni ~ 9%, Mo ~ 2%) and homogeneity of the texture, justifying the success of the optimized process. The collective integration of Taguchi’s experimental approach, followed by GRA-based optimization offers a sound framework with scalable, accurate laser surface texturing. The study demonstrates the convincing tribological efficacy of homothetic dimples in high-performance biomedical, aerospace, and automotive components.</p> Graphical Abstract <p></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

Investigation on laser parameter optimization for homothetic and hybrid micro-texturing on SS316L for tribological study

  • 期刊论文

  • 发表日期：

    2026年3月2日

查看全文
  • Avadhoot Rajurkar,
  • Rahul Waikar,
  • Ghanshyam Mugle,
  • Nishant Deore,
  • Nitesh Tandel,
  • Vivek Mhaske,
  • Apurva Nanekar,
  • Tushar Mane

摘要

Surface micro-textures have been known to improve the tribological properties through the reduction of contact area and encouragement of lubricants entrapment. This study investigates and compares homothetic (dimple and channel) and hybrid (dimple with channel) laser-induced micro-textures on SS316L surfaces with the aim of increasing frictional efficiency in dry running conditions. A custom-developed quadrant-based indexing scheme was developed to ensure accurate and repeatable texturing across the full circular disc. Taguchi’s robust design approach, with the addition of ANOVA and Grey Relational Analysis (GRA), was utilized for multi-response optimization of laser attributes, with optimal values of 27 W laser power, 60 kHz frequency, and 1500 mm/s scanning velocity determined. A Ti–sapphire nanosecond pulsed laser was utilized to generate the textures with high geometric fidelity. The homothetic and hybrid track carrying discs were tested using the pin-on-disc method with variable loads and speeds. Homothetic dimples performed better, realizing efficient wear and minimizing friction with effective holding of the lubricant and stable contact. Conversely, the 0°-oriented hybrid textures showed high friction and wear because of ploughing of the edge and fragmentation of the lubrication film. Results from SEM–EDS analysis confirmed uniform surface composition (Fe ~ 66%, Cr ~ 16%, Ni ~ 9%, Mo ~ 2%) and homogeneity of the texture, justifying the success of the optimized process. The collective integration of Taguchi’s experimental approach, followed by GRA-based optimization offers a sound framework with scalable, accurate laser surface texturing. The study demonstrates the convincing tribological efficacy of homothetic dimples in high-performance biomedical, aerospace, and automotive components.

Graphical Abstract