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李春燕,朱福平,丁娟强,尹金锋,王铮,赵燕春,寇生中.Zr基块体金属玻璃蠕变行为的纳米压痕研究[J].稀有金属材料与工程(英文),2020,49(10):3353~3360.[Li Chunyan,Zhu Fuping,Ding Juanqiang,Yin Jinfeng,Wang Zheng,Zhao Yanchun and Kou Shengzhong.Nanoindentation Investigation on Creep Behavior of Zr-Based Bulk Metallic Glass[J].Rare Metal Materials and Engineering,2020,49(10):3353~3360.]
Nanoindentation Investigation on Creep Behavior of Zr-Based Bulk Metallic Glass
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Received:September 02, 2019  Revised:December 29, 2019
DOI:
Key words: Nanoindentation  Hardness  Loading rate  Stress exponent  Holding time
Foundation item:NSFC(No.51661016, No.51861021, No.51571105, No.51661017), Wenzhou Public Welfare Science and Technology Project (G20170019)
Author NameAffiliation
Li Chunyan,Zhu Fuping,Ding Juanqiang,Yin Jinfeng,Wang Zheng,Zhao Yanchun and Kou Shengzhong  
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Abstract:
      In the present work, the effect of loading rate and holding time on the creep deformation behavior of (Zr0.6336Cu0.1452Ni0.1012Al0.12)97.4Er2.6 bulk metallic glass (BMG) was investigated by using nanoindentation technique. Experimental results demonstrate that the creep displacement of specimen increases with the increase of loading rate or holding time. On the other hand, the hardness (H) of specimen falls with the rise of loading rate or holding time. The H drops with the growth of indentation depth during the nanoindentation process, which indicates that specimen has a size effect. Specimen has a serrated flow phenomenon which has rate dependence. Specifically, as the loading rate declines, the serrated flow phenomenon becomes more obvious. The creep stress exponent of specimen goes down with the increases of loading rate or holding time.