1:45 PM - 2:00 PM
▲ [17p-A404-3] Interface of Polyethylene Terephthalate (PET) Directly Laser Joined with Stainless Steel (SUS304)
Keywords:laser welding mechanism, surface/interface, joining dissimilar materials
Design engineers are increasingly faced with the need to join dissimilar materials, as they are seeking creative new structures or parts with tailor-engineered properties. Sometimes, a part needs high-temperature resistance in one area, good corrosion resistance in another. Structures may need toughness or wear resistance in one area combined with high strength in another location. Improving the ability to join dissimilar materials with engineered properties are enabling new approaches to light-weight automotive structures, improving methods for energy production, creating next generation medical products and consumer devices, and many other manufacturing and industrial uses.
Joining dissimilar materials is often more difficult than joining the same material or alloys with minor differences in composition; however, many dissimilar materials can be joined successfully with the appropriate joining process and specialized procedure. Here, we report results of our experimental and theoretical studies on the interface formed by the direct laser joining of engineering plastic, e.g., poly(ethylene terepthalate) (PET), with SUS304 austenitic stainless steel~\cite{1}. To study the interface, we used transmission electron microscopy (TEM), in conjunction with energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR) spectroscopy in combination with the attenuated total reflectance (ATR) technique, and density functional theory (DFT)-based total energy calculations. Our preliminary results suggest that the plastic-metal joint interface could be produced by bonding between PET-derived oxygen (O) and metal-oxide-film-based chromium (Cr). We found that the interface between the SUS304 and PET shows a significant increase in the amount of chromium (Cr) and oxygen (O) species as compared to that of the pure SUS304 and PET layers, respectively. Further details will be discussed at the meeting.
Joining dissimilar materials is often more difficult than joining the same material or alloys with minor differences in composition; however, many dissimilar materials can be joined successfully with the appropriate joining process and specialized procedure. Here, we report results of our experimental and theoretical studies on the interface formed by the direct laser joining of engineering plastic, e.g., poly(ethylene terepthalate) (PET), with SUS304 austenitic stainless steel~\cite{1}. To study the interface, we used transmission electron microscopy (TEM), in conjunction with energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR) spectroscopy in combination with the attenuated total reflectance (ATR) technique, and density functional theory (DFT)-based total energy calculations. Our preliminary results suggest that the plastic-metal joint interface could be produced by bonding between PET-derived oxygen (O) and metal-oxide-film-based chromium (Cr). We found that the interface between the SUS304 and PET shows a significant increase in the amount of chromium (Cr) and oxygen (O) species as compared to that of the pure SUS304 and PET layers, respectively. Further details will be discussed at the meeting.