具有拉伸塑性和明显增强的β弛豫行为的高能态非晶丝  

Tensile plasticity with enhancedβ-relaxation in high-energy metallic glass wires

作　　者：解玖远 裴超群 周靖 丁大伟 冯涛 李涵 孙保安 Jiuyuan Xie;Chaoqun Pei;Jing Zhou;Dawei Ding;Tao Feng;Han Li;Baoan Sun(School of Physics and Materials Science,Guangzhou University,Guangzhou 510006,China;Songshan Lake Materials Laboratory,Dongguan 523808,China;Herbert Gleiter Institute of Nanoscience,School of Material Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]School of Physics and Materials Science,Guangzhou University,Guangzhou 510006,China [2]Songshan Lake Materials Laboratory,Dongguan 523808,China [3]Herbert Gleiter Institute of Nanoscience,School of Material Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China [4]Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Science China Materials》2023年第11期4233-4238,共6页中国科学（材料科学（英文版）

基　　金：supported by the Young Talent Program of Guangzhou University(RQ2020077);China Biosafety Research Special Program(20SWAQX40);Guangdong Major Project of Basic and Applied Basic Research,China(2020B1515120092)。

摘　　要：本文通过Taylor-Uitovsky方法成功制备了高质量Fe基、Ni基、Co基非晶丝.与相同成分的传统非晶合金相比,该非晶丝表现出普遍的β弛豫增强和更高的能量状态,可以认为是高回春态的非晶丝.值得注意的是,这种非晶丝的能量增强率达到了216.38%,是目前各种增强非晶合金能量状态方法中的最高值.研究发现,β弛豫的增强归因于结构异质性引起的高能量状态,从而使得非晶丝具有优良的力学性能,跟相同成分的非晶条带相比,其断裂强度提高至3240 MPa,拉伸塑性应提高至1.7%.本研究从β弛豫的角度实现了高能态的非晶合金的制备,为打破强度和拉伸塑性之间的权衡提供了一个新见解.Herein,uniform high-quality Fe-,Ni-,and Co-based metallic glass wires(MGWs)were successfully synthe-sized by the Taylor-Uitovsky method.The MGWs exhibited universal and enhancedβ-relaxation and a higher-energy state compared with conventional MGs with the same composition,which can be regarded as highly rejuvenated MGs.Notably,the enhancement of the energy tuning rate of MGWs was 216.38%,which is the highest value obtained from various methods.It was found that the enhancedβ-relaxation was related to the high energy induced by structural hetero-geneities,which resulted in excellent mechanical properties such as improved fracture strength of 3240 MPa and large tensile plastic strain of 1.7%.This work offers new insights into overcoming the tradeoff between strength and tensile plasticity in the MG family through the preparation of high-energy MGs viaβ-relaxation.

关 键 词：metallic glass wire high energy β-relaxation beha-vior tensile plasticity 

分 类 号：TG139.8[一般工业技术—材料科学与工程]