Unusual gradient stress induced superior room-temperature plasticity in brittle ferromagnetic bulk metallic glass  

作　　者：Meng Wang Weiming Yang Si Lan Zongzhen Li Qianqian Wang Wenyu Li Jing Tao Jing Zhou Qiang Li Haishun Liu Akihisa Inoue 

机构地区：[1]School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China [2]School of Opto-electronic Engineering,Zaozhuang University,Zaozhuang 277160,China [3]Herbert Gleiter Institute of Nanoscience,Nanjing University of Science and Technology,Nanjing 210094,China [4]Jiangsu JITRI Advanced Energy Materials Research Institute Co.,Ltd.,Changzhou 213001,China [5]School of Materials Science and Engineering,Southeast University,Nanjing 211189,China [6]School of Mechanical Engineering,Sichuan University of Science and Engineering,Zigong 643000,China [7]School of Physics Science and Technology,Xinjiang University,Urumqi 830046,China [8]School of Materials Sciences and Physics,China University of Mining and Technology,Xuzhou 221116,China [9]International Institute of Green Materials,Josai International University,Togane,283-8555,Japan

出　　处：《Journal of Materials Science & Technology》2024年第11期70-79,共10页材料科学技术（英文版）

基　　金：National Natural Science Foundation of China(No.52171165)。

摘　　要：Ferromagnetic bulk metallic glasses(FBMGs)possess excellent soft magnetic properties,good corrosion resistance,and high strength.Unfortunately,their commercial utility is limited by their brittleness.In this work,we report the enhancement in the room-temperature plasticity during the compression(25%)and bending flexibility of Fe_(74)Mo_(6)P_(13)C_(7) FBMG by using water quenching.The high-energy synchrotron X-ray measurements,high-resolution transmission electron microscopy,three-dimensional X-ray microtomog-raphy,and finite element simulation were performed to reveal the origin.It was found that the M-shape profile of residual stress improves the mechanical properties of FBMGs,particularly their plasticity.The reversal of the heat-transfer coefficient and cooling rate from the'vapor blanket'to'nucleate boiling'transition during water quenching processing is the main cause of the unusual profile of residual stress in glassy cylinders.Encouraged by the progress in developing flexible silicate glasses,this work highlights a processing method to improve plasticity and surmount technical barriers for the commercialization of FBMGs.

关 键 词：Ferromagnetic bulk metallic glasses PLASTICITY Flexibility Residual stress 

分 类 号：TG139.8[一般工业技术—材料科学与工程]