By Dirk Havermann, William N. Macpherson, Robert R. J. Maier and Duncan P. Hand

Laser Additive Manufacturing provides novel and exciting possibilities when constructing 3-dimensional free form components in polymers and metals.  The process of building 3D components from the inside-out opens up the possibility of embedding sensors into the heart of a component.  Fiber Bragg gratings are an ideal sensor for smart composite materials and are already used for delivering in-situ measurements of polymer components. Recently developed high temperature compatible fiber Bragg gratings, suitable for continuous use at temperatures of up to 1000 °C, provide the opportunity of extending sensing capabilities to metallic components. In this cross-disciplinary project, fiber optic sensing and laser additive manufacturing are merged to encapsulate fiber optic sensors into stainless steel components.  Continue reading →