Microstructural Engineering Enabled by NDE through SRAS integration with LPBF Additive Manufacturing

SRAS（空间分辨声光谱）是一种非破坏性的评估方法，它允许工程师通过评估SAW（表面声波）来获得晶体和多晶材料的晶体取向。目前，SRAS主要用于材料加工后微观结构的研究。该研究项目旨在进一步发展SRAS技术，以便在被称为L-PBF（激光粉末床融合）的增材制造生产过程中对材料进行主动研究。这将使在制造过程中通过非破坏性手段对组件的晶体结构进行主动评估。通过将这些信息反馈到3D打印系统中，该项目希望能够开发出具有特定晶体结构的3D打印合金。

SRAS (Spatially resolved acoustic spectroscopy) is a non destructive evaluation method that allows engineers to access the crystallographic orientation of crystalline and polycrystalline materials through the assessment of SAW (surface acoustic waves). Currently SRAS is used for the study of microstructures in materials post fabrication. The research project aims to further develop the SRAS technique to enable the active study of materials during fabrication throughout the additive manufacturing production process known as L-PBF(laser powder bed fusion). This will enable the active assessment of the crystallographic structure of components during fabrication through non destructive means. By feeding this information back into 3D printing systems, the project hopes to develop the capabilities in producing 3D printed alloys with specific crystallographic structures.