首页|Plasticity and rejuvenation of aged metallic glasses by ultrasonic vibrations
Plasticity and rejuvenation of aged metallic glasses by ultrasonic vibrations
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Metallic glasses(MGs)possess exceptional properties,but their properties consistently deteriorate over time,thereby resulting in increased complexity in processing.It thus poses a formidable challenge to the forming of long-term aged MGs.Here,we report ultrasonic vibration(UV)loading can lead to large plas-ticity and strong rejuvenation in significantly aged MGs within 1 s.A large UV-induced plasticity(UVIP)of 80％height reduction can be achieved in LaNiAl MG samples aged at 85％of its glass transition tem-perature(0.85Tg)for a duration of up to 1 month.The energy threshold required for UVIP monotonously increases with aging time.After the UV loading process,the aged samples show strong rejuvenation,with the relaxation enthalpy even surpassing that of as-cast samples.These findings suggest that UV loading is an effective technique for forming and rejuvenating aged MGs simultaneously,providing an alterna-tive avenue to explore the interplay between the property and microstructures as well as expanding the application prospects of MGs.
Guangdong Key Laboratory of Electromagnetic Control and Intelligent Robots,Shenzhen University,Shenzhen 518060,China
Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing,College of Mechatronics and Control Engineering Shenzhen University,Shenzhen 518060,China
Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China
School of Mechanical,Electrical and Information Engineering Shandong University,Weihai 264209,China
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Key Basic and Applied Research Program of Guangdong Province,China国家自然科学基金国家自然科学基金国家自然科学基金Science and Technology Innovation Commission ShenzhenScience and Technology Innovation Commission Shenzhen国家重点研发计划
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