114學年材料所-第二週 專題研討課程 演講公告 (114年9月18日)
2025.09.16
題目:
超音波銲接硬質金屬中的相變行為與界面強化策略
Phase Transformation Behavior and Interface Strengthening Strategies in Ultrasonic Welding of Hard Metals
演講者: 林哲宇(JHE-YU LIN)
現職: 國立臺北科技大學 機械工程系 副教授
時間: 114年 9月 18日(四) 3:20~4:00 pm
地點: 成功大學成功校區三系館 鋼構區(3F)共同教室A1302演講廳
演講摘要:
Ultrasonic welding (USW) is a low-energy joining technique that utilizes pressure and high-frequency vibration to induce interfacial frictional heating and plastic deformation, thereby achieving metallurgical bonding. While USW has been successfully applied to soft metals such as aluminum and high-thermal-conductivity metals like copper, as well as dissimilar systems such as Fe–Al, its applicability to high-melting-point hard metals remains underexplored. In this study, USW is applied to hard metals, including steels, high-entropy alloys, and commercially pure titanium. Subsequent mechanical testing and interfacial microstructural characterization are conducted to evaluate joint performance. Special attention is given to interfacial phenomena such as plastic flow, dynamic recrystallization, interfacial reaction, and phase transformations, to assess their roles in governing weld strength and developing effective interface strengthening strategies.
超音波銲接硬質金屬中的相變行為與界面強化策略
Phase Transformation Behavior and Interface Strengthening Strategies in Ultrasonic Welding of Hard Metals
演講者: 林哲宇(JHE-YU LIN)
現職: 國立臺北科技大學 機械工程系 副教授
時間: 114年 9月 18日(四) 3:20~4:00 pm
地點: 成功大學成功校區三系館 鋼構區(3F)共同教室A1302演講廳
演講摘要:
Ultrasonic welding (USW) is a low-energy joining technique that utilizes pressure and high-frequency vibration to induce interfacial frictional heating and plastic deformation, thereby achieving metallurgical bonding. While USW has been successfully applied to soft metals such as aluminum and high-thermal-conductivity metals like copper, as well as dissimilar systems such as Fe–Al, its applicability to high-melting-point hard metals remains underexplored. In this study, USW is applied to hard metals, including steels, high-entropy alloys, and commercially pure titanium. Subsequent mechanical testing and interfacial microstructural characterization are conducted to evaluate joint performance. Special attention is given to interfacial phenomena such as plastic flow, dynamic recrystallization, interfacial reaction, and phase transformations, to assess their roles in governing weld strength and developing effective interface strengthening strategies.