- Country: USA
- Summary: TECHNOLOGY/BUSINESS OPPORTUNITY Laser beam shaping for improved microstructure and defect control in laser-based metal additive manufacturing or welding processes
- UST Ref No: 125282860
- Deadline: 27 Sep 2025
- Financier: Self Financed
- Purchaser Ownership: Government
- Tender Value: Refer Document
- Notice Type: Tender
- Document Ref. No.: IL-13971
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- Description:
- Description
Opportunity:
Lawrence Livermore National Laboratory (LLNL), operated by the Lawrence Livermore National Security (LLNS), LLC under contract no. DE-AC52-07NA27344 (Contract 44) with the U.S. Department of Energy (DOE), is offering the opportunity to enter into a collaboration to further develop and commercialize its laser beam shaping for improved microstructure and defect control in laser-based metal additive manufacturing or welding processes.
Background:
Parts fabricated by additive manufacturing (AM) typically have mechanical properties that differ from parts produced by conventional manufacturing. There may be microstructural differences such as the presence of elongated grains or high concentrations of dislocations in an AM part. Of the different metal AM methods, laser powder bed fusion (LPBF) presents particular challenges due to the relatively small-sized powders (typically 10 - 50 um) used and the interactions of the metal with the tightly focused laser. Common defects, such as incomplete melting, gas porosity, and high residual stresses, are difficult to avoid and present significant challenges to printing reliability.
These challenges often result in small windows of acceptable processing parameters that can give the optimal properties. Optimizing one property will often deteriorate another property, i.e. optimizing density can decrease microstructure uniformity or residual stress. Conversely, improving microstructure uniformity can decrease density.
A large contributor to these issues is that the typical LPBF laser beam profile used have a Gaussian shape; these beams are non-optimal for the laser AM process because of laser-material interactions during printing that are undesired such as keyholing (laser-vapor interactions), spatter and porosity (melt pool instabilities) and anisotropic mechanical properties (large thermal gradients). In metal AM using directed energy deposition or in laser-welding processes, th... - Documents:
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CLICK HERE TO LOGINTECHNOLOGY/BUSINESS OPPORTUNITY Laser beam shaping for improved microstructure and defect control in laser-based metal additive manufacturing or welding processes - USA Tender
The ENERGY, DEPARTMENT OF, a Government sector organization in USA, has announced a new tender for TECHNOLOGY/BUSINESS OPPORTUNITY Laser beam shaping for improved microstructure and defect control in laser-based metal additive manufacturing or welding processes. This tender is published on USARFP under UST Ref No: 125282860 and is categorized as a Tender. Interested and eligible suppliers are invited to participate by reviewing the tender documents and submitting their bids before the deadline on 2025-09-27.
The estimated tender value is Refer Document, and full details, including technical specifications and submission requirements, are provided in the official tender documents. Ensure all submissions meet the criteria outlined to be considered for evaluation.
