| Scope |
Large-scale metal additive manufacturing (AM) is a potentially disruptive manufacturing process for creating large-scale metal parts. The manufacturing envelope can be huge (e.g., parts up to 8 feet are regularly printed) and can take days or even weeks to print. For this technology to be adopted for manufacturing of critical structural components, tight control of part properties and performance is required for various large-scale AM processes (e.g., arc, laser, electron beam, etc.). The major challenges are thermally induced part distortion and residual stress management. Under dynamic printing conditions and complex part geometries, part deformation is primarily associated with varying thermal cycles influencing phase transformation and internal stress buildup. This can reduce the local part strength causing cracking or catastrophic failure of a structural component. Although there are extensive advances in welding and powder-based AM community, challenges in large-scale AM still hinder the wide adoption of this technology to aerospace or automotive or other industries. The goal of this symposium is to highlight advanced research activities in large-scale AM. Proposed topic areas include but not limited to:
• In-situ process monitoring and defect quantification (e.g., residual stress, distortion, cracking, etc.) in large-scale AM
• Process parameter optimization: thermal and property control method to manage metallurgical transformation, mechanical properties, and part deformation
• Innovative system design to improve part quality (e.g., rolling, multi-heat sources, etc.)
• Efficient modeling & simulations and machine learning aided design to understand correlation between process-microstructure-property
• Developing new alloys or dissimilar parts fabricated by large-scale AM
• Effect of part building strategy and post-heat treatment to obtain desired part properties |