Metal additive manufacturing laser process fundamentals

“这是一个机械工程的博士研究项目。该项目的目的是提高对金属增材制造（3D打印）粉末床熔融（PBF）过程中激光-粉末床相互作用的基本理解。这种改进的理解将有助于流程优化和效率（在质量和生产力方面）。该项目将建立在我们现有的形象和造型经验。它将探索以下领域：激光羽流对激光束吸收、散焦和指向稳定性的影响，以提高加工稳定性;替代性激光束轮廓（空间和时间），以减少热输入和飞溅;以及次大气压和高压大气，以探索新的加工制度。"

"This is a PhD research project in Mechanical Engineering. The aim of this project is toimprove the fundamental understanding of laser-powder bed interactions during the powder bed fusion(PBF) process for the additive manufacture (3D printing) of metals. This improved understanding will informprocess optimization and effectiveness (in terms of quality and productivity). The project will build on ourexisting image and modelling experience. It will explore areas such as: the influence of the laser plume onabsorption, defocus and pointing stability of the laser beam in order to increase process stability; alternativelaser beam profiles (spatial and temporal) to reduce heat input and spatter; and sub-atmospheric andhyperbaric atmospheres to explore new processing regimes."