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）粉末床融合（PBF）过程中激光-粉末床相互作用的基本理解。这种改进的理解将为流程优化和有效性（在质量和生产力方面）提供信息。该项目将以我们现有的形象和建模经验为基础。探讨了激光羽流对激光束吸收、散焦和指向稳定性的影响，以提高工艺稳定性；可选择的激光光束轮廓（空间和时间），以减少热输入和飞溅；以及亚大气和高压大气，以探索新的处理机制。”

"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."