Innovative Method of Embedding Optical Fiber inside Titanium Alloy Utilizing Friction Stir Forming

Abstract:

The development of FBG (Fiber Bragg Grating) sensors is essential for intelligent parts of airplanes to achieve ultra-lightweight structures and intelligent aviation control. Awaiting solution is embedding technology of optical fiber sensors into the base material of the parts; however, it has been challenging to embed fibers into high melting temperature point alloys like titanium-based materials without having any defects. Present research fulfills the mentioned demands effectively by utilizing Friction Stir Forming (FSF). Precisely, optical fiber has been placed into a guide slit inside the titanium sheet. Then, FSF was applied to the surface of the titanium. As a result, titanium plasticizes and flows into the guide slit. This mechanically interlocks the optical fiber inside the titanium alloy. This solid-state stirring process can bury sensors inside the titanium to protect the sensor from harsh environments. Embedded sensors will detect the strain and temperature of the host titanium in real-time. Moreover, this research can have further considerable effects on the areas like aerospace and artificial intelligence systems that demand real-time condition monitoring systems.

• Periodical: Key Engineering Materials (Volume 934)
• Pages: 67-73
• DOI: https://doi.org/10.4028/p-683ks0
• Online since: November 2022
• Authors: Hamed Mofidi Tabatabaei*, Takahiro Ohashi, Tadashi Nishihara
• Keywords: Friction Stir Forming, Friction Stir Welding, Functional Materials, Mechanical Joining, Optical Fiber Sensor, Titanium

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