摘要
近期研究表明,金属玻璃可通过热激励或机械激励的方法回春到更加亚稳的高能量状态,同时伴随着原子堆垛的松散化。回春过程可有效提高金属玻璃的宏观塑性。从金属玻璃弛豫与回春概念入手,简要介绍金属玻璃的回春手段,总结不同方法的优缺点。重点介绍深冷循环热处理(一种对样品形态无破坏性且适用性较高的回春方法)的效果、热处理参数对回春程度的影响以及回春后金属玻璃力学和磁性能的演化规律。最后,就金属玻璃回春行为进行分析,并对未来重要研究方向提出展望。
Recent researches have shown that metallic glasses(MGs)can be rejuvenated to a more metastable energy state by thermal or mechanical approaches,which causes a looser atomic packing.This process can effectively improve the overall plasticity of MGs.The present work started with the concept of ageing and rejuvenation of MGs,briefly introducing the probable methods to rejuvenate the MGs,then the advantages and disadvantages of various methods were summarized,and the effects of deep cryogenic cycling method(a non-destructive method to sample morphology and feasible to conduct)were investigated in detail.The effects of treating parameters on the degree of rejuvenation and the effects of rejuvenation on the mechanical and magnetic properties of MGs were also summarized.Finally,some conclusions in this field are drawn and some important questions that deserve further study are put forward.
作者
王明梓
郭威
吕书林
吴树森
Ming-zi WANG;Wei GUO;Shu-lin LÜ;Shu-sen WU(State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,China;Research Institute of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518057,China)
基金
supported by the National Natural Science Foundation of China(No.52101138)
the Natural Science Foundation of Hubei Province,China(No.2020CFB259)
State Key Lab of Advanced Metals and Materials,China(No.2020-Z01)
State Key Laboratory for Mechanical Behavior of Materials,China(No.20202205)
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,China(No.32015001)
Guangdong Basic and Applied Basic Research Foundation,China(No.2020A1515110531)。
关键词
金属玻璃
回春
深冷循环
弛豫焓
塑性
metallic glass
rejuvenation
deep cryogenic cycling
relaxation enthalpy
plasticity
