Scholarlink

<p>This study investigates the influence of laser power, scan speed, and hatch spacing on the mechanical and tribological behavior of Direct Metal Laser Sintering (DMLS)-fabricated SS316L using a Taguchi L27 experimental design combined with Grey Relational Analysis (GRA). The results show that increasing laser power and reducing hatch spacing significantly improved densification, achieving a relative density above 99% with reduced porosity. Microhardness increased from 167 to approximately 274&#xa0;HV, while ultimate tensile strength increased from 405 to 645&#xa0;MPa. Tribological tests under dry sliding conditions showed friction coefficients within the range of 0.45-0.60, along with noticeable differences in wear behavior related to surface integrity and microstructural refinement. SEM and EDS analyses revealed refined cellular microstructures and strong metallurgical bonding between layers. Taguchi–Grey relational analysis identified laser power as the dominant parameter, contributing approximately 55% to the overall performance variation. The optimal parameter combination of 350&#xa0;W laser power, 1300&#xa0;mm/s scan speed, and 0.10&#xa0;mm hatch spacing produced the most favorable mechanical and tribological response. These findings provide useful insights for optimizing DMLS processing conditions for SS316L 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

Influence of Process Parameters on Mechanical and Tribological Behavior of Direct Metal Laser Sintering-Fabricated SS316L Using Taguchi–Grey Relational Approach

  • 期刊论文

  • 发表日期：

    2026年5月3日

查看全文
  • Muddada Venkatesh,
  • Gurabvaiah Punugupati,
  • Hymavathi Madivada,
  • Sreeramulu Dowluru,
  • Phani K. Mallisetty,
  • C. S. P. Rao

摘要

This study investigates the influence of laser power, scan speed, and hatch spacing on the mechanical and tribological behavior of Direct Metal Laser Sintering (DMLS)-fabricated SS316L using a Taguchi L27 experimental design combined with Grey Relational Analysis (GRA). The results show that increasing laser power and reducing hatch spacing significantly improved densification, achieving a relative density above 99% with reduced porosity. Microhardness increased from 167 to approximately 274 HV, while ultimate tensile strength increased from 405 to 645 MPa. Tribological tests under dry sliding conditions showed friction coefficients within the range of 0.45-0.60, along with noticeable differences in wear behavior related to surface integrity and microstructural refinement. SEM and EDS analyses revealed refined cellular microstructures and strong metallurgical bonding between layers. Taguchi–Grey relational analysis identified laser power as the dominant parameter, contributing approximately 55% to the overall performance variation. The optimal parameter combination of 350 W laser power, 1300 mm/s scan speed, and 0.10 mm hatch spacing produced the most favorable mechanical and tribological response. These findings provide useful insights for optimizing DMLS processing conditions for SS316L components.

Graphical Abstract