Capability Assessment of X-Ray Computed Tomography for the Inspection of Metal Additive Manufactured Products

总部位于温尼伯的Precision ADM(PADM)Inc.使用Additive Manufacturing(AM)技术 为医疗、航空航天、能源和工业部门制造高价值部件。帕德姆是 马尼托巴省地区第一家私营金属AM公司，并在当地和全球建立了 出现在战场上。金属AM工艺相当复杂，因此，用 这项技术可能存在一些与工艺相关的缺陷。缺陷，如孔洞、裂缝和结构 通常在成品AM部件中发现失真，从而损害这些部件的功能完整性 组件。关键部件，如用于航空航天和医疗应用的部件，通常需要 仔细检查，以满足严格的安全要求。Padm采用了其他检查 包括金相和显微镜在内的技术，用于分析AM产品，并已发送样品 在数百英里之外进行二维X射线和其他分析。一台新的X射线计算机的收购 红河学院(RRC)的断层扫描(X-Ray CT)能力为PADM提供了一个独特的机会 对这项技术进行评估，用于零件检测。X射线CT系统将有助于全面分析 具有复杂几何形状的零件的内腔、气孔和尺寸。要获得高质量的X射线CT扫描 这是高缺陷可检测性和准确的维度分析、能力评估和 需要为金属AM产品建立系统的最佳实践指南。 PADM正在与RRC的航空航天和制造技术接入中心(TACAM)合作 评估X光CT，发展能力，制定AM检查和资格认证指南 零件。这将涉及确定不同部件的最小可检测缺陷尺寸和尺寸精度 AM材料、厚度和几何图形变化。常用金属调幅标准试件 材料将由PADM使用其定向金属激光烧结(DMLS)AM系统生产，该系统

Precision ADM (PADM) Inc., based in Winnipeg, uses Additive Manufacturing (AM) technology to manufacture high-value components for the medical, aerospace, energy, and industrial sectors. PADM is the first private sector metals AM Company in the Manitoba region and has an established local and global presence in the field. Metal AM processes are considerably complex, and as such, components produced with this technology can suffer from some process-related defects. Defects such as porosity, cracks, and structural distortion are routinely found in the finished AM parts, thereby compromising the functional integrity of such components. Critical components, such as those used for aerospace and medical applications, usually require careful inspection in order to meet stringent safety requirements. PADM has adopted other inspection techniques including metallography and microscopy, for analyzing the AM products, and has sent samples hundreds of miles away for 2D X-Ray and other analysis. The acquisition of a new X-Ray Computed Tomography (X-Ray CT) Capability at Red River College (RRC) presents a unique opportunity for PADM to evaluate this technology for parts inspection. The X-Ray CT system will help in the comprehensive analysis of internal cavities, porosities, and dimension of parts with complex geometries. To obtain quality X-Ray CT scan that is required for high defect detectability and accurate dimensional analysis, capability assessment and best-practice guidelines for the system need to be established for metal AM products. PADM is collaborating with RRC's Technology Access Centre for Aerospace and Manufacturing (TACAM) to evaluate X-Ray CT, develop capability and establish guidelines for the inspection and qualification of AM parts. This will involve determining the minimum detectable defect size and dimensional accuracy for different AM materials, thicknesses, and geometry variations. Standard specimens of commonly used metallic AM materials will be produced by PADM, using their directed metal laser sintering (DMLS) AM systems, which