• • Ultrasonic welding of Zr55Cu30Ni5Al10 metallic glass achieves joint efficiencies exceeding 80% with interfacial temperatures maintained below the glass transition temperature (Tg), preventing crystallization and preserving amorphous structure—critical for medical implants and precision micro-gears where devitrification degrades corrosion resistance and magnetic performance.
• • Fe78Si9B13 metallic glass foils joined to aluminum via ultrasonic-assisted soldering exhibit shear strengths up to 45 MPa, enabling lightweight dissimilar joints for aerospace and automotive applications where traditional fusion welding causes embrittlement and loss of soft magnetic properties.
• • Ultrasonic-assisted rapid cold welding of bulk metallic glasses (BMGs) at room temperature achieves joining within seconds (processing times <5 s) with minimal thermal impact, reducing energy consumption by >90% compared to conventional welding—directly addressing the dimensional limitations of BMGs by enabling component assembly without bulk heating.
• • Fe-based metallic glass cores reduce energy loss by more than 70% compared to traditional crystalline Fe-Si alloys (silicon steel sheets) due to superior soft magnetic properties and low coercivity, making UW-assembled MG cores economically viable for power electronics and transformers where efficiency gains translate to significant operational cost savings.