Scholarlink

Laser-based directed energy deposition of AlSi10Mg was carried out on SS 304L to investigate the role of input laser fluence on deposition characteristics and dilution of Fe from SS 304L substrate. The study helps to understand the feasibility of laser coating of AlSi10Mg on steel for bimetallic components fabrication to improve thermal dissipation. A set of five single-track depositions was carried out with decreasing input laser fluence conditions from 6.7 to 2.857 kJ/cm2 through a gradual increase in scanning speed from 600 to 1200 mm/min, keeping laser power constant at 800 W. Online thermal signature monitoring was also carried out using an infrared pyrometer. Microstructural analysis showed the presence of Fe- and Cr-rich needle- and fern-shaped structures along with evidence of fine cracks formation within the deposits. Elemental analysis depicted an increase in the extent of dilution from the underlying SS 304L substrate with the decrease in laser fluence due to an increase in scan speed. Phase analysis showed the presence of brittle intermetallic compounds like iron aluminide and magnesium silicide phases responsible for crack formation in the deposited tracks.

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

Role of Laser Fluence on the Characteristics of AlSi10Mg Track Deposited Through DED-L-Based Additive Manufacturing Technique

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Saurav Misra,
  • Ipsita Mohanty,
  • Mohit Raj,
  • Rajib Chakraborty,
  • Partha Saha

摘要

Laser-based directed energy deposition of AlSi10Mg was carried out on SS 304L to investigate the role of input laser fluence on deposition characteristics and dilution of Fe from SS 304L substrate. The study helps to understand the feasibility of laser coating of AlSi10Mg on steel for bimetallic components fabrication to improve thermal dissipation. A set of five single-track depositions was carried out with decreasing input laser fluence conditions from 6.7 to 2.857 kJ/cm2 through a gradual increase in scanning speed from 600 to 1200 mm/min, keeping laser power constant at 800 W. Online thermal signature monitoring was also carried out using an infrared pyrometer. Microstructural analysis showed the presence of Fe- and Cr-rich needle- and fern-shaped structures along with evidence of fine cracks formation within the deposits. Elemental analysis depicted an increase in the extent of dilution from the underlying SS 304L substrate with the decrease in laser fluence due to an increase in scan speed. Phase analysis showed the presence of brittle intermetallic compounds like iron aluminide and magnesium silicide phases responsible for crack formation in the deposited tracks.