Effect of cryogenic cycling on mechanical properties of ZrTiCuNiBe bulk metallic glass  

作　　者：Zhen Peng Yumei Chen Geng Yin Pan Gong Zahra Jamili-Shirvan Ning Li Xinyun Wang Kefu Yao 

机构地区：[1]School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China [2]State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,No.1037 Luoyu Road,Wuhan 430074,China [3]Research Institue of Huazhong University of Science and Technology in Shenzhen,Shenzhen 518057,China [4]Esfarayen University of Technology,Esfarayen,North Khorasan,Iran [5]School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Fundamental Research》2022年第5期764-775,共12页自然科学基础研究（英文版）

基　　金：financially supported by the National Science Foundation for Distinguished Young Scholars of China(Grant No.51725504);the open funding via State Key Laboratory of Materials Processing and Die&Mould Technology(Grant No.P2019-011);the Guangdong Provincial Natural Science Foundation of China(Grant No.2020A1515011524);the Fundamental Research Funds for the Central Universities,HUST(Grant No.2018KFYRCPT001).

摘　　要：The effect of deep cryogenic cycle treatment(DCT)on Zr_(41.2)Ti_(13.8)Cu_(12.5)Ni_(10)Be_(22.5)(Vit-1)bulk metallic glass(BMG)prepared from high-purity raw materials was investigated.After DCT,no obvious rejuvenation of the samples was detected.With an increasing number of cryogenic cycles,the hardness of the samples first decreased and then increased,the room-temperature compression plasticity first increased and then generally remained unchanged,and the impact toughness underwent almost no obvious change.The absence of rejuvenation was attributed to the high fragility index(47-50)and high glass forming ability(GFA)of the material.As lower purity of the raw materials is expected in practical applications,DCT of Vit-1 BMG prepared from low-purity raw materials was also performed.After DCT,the samples prepared with the lower-purity raw materials were clearly rejuvenated,and the room-temperature mechanical properties improved significantly.Both the compression plasticity and impact toughness reached peak values after 5 cryogenic cycles.The initial impurities(including Y and O)had a complex and comprehensive effect on the deformation mechanism of the BMG during DCT.Our findings indicate that the structural heterogeneity,fragility index,and GFA of the BMG alter the effect of DCT.

关 键 词：Bulk metallic glass Deep cryogenic cycle treatment IMPURITY REJUVENATION Mechanical properties 

分 类 号：O643.6[理学—物理化学]