29Zr32Ti15Al5Ni19 was investigated by nanoindentation in detail with load-controlled, continuous stiffness measurement (CSM) and cyclic loading mode, respectively. Pop-in occurs in this alloy during nanoindentation. Applied load have more influences on the pop-in events than loading rate does. When the applied load is larger than 40mN, obvious pop-in events can be observed in the loading curves even at high up to 5mN/s loading rate. Indentation size effect exists in this alloy, confirmed by the hardness decreasing with the increasing indentation load and a Meyer’s index n less than 2. The fraction of energy dissipated during indentation (Ed) changes within the range of 54%-60%. Cyclic loading tests reveal obvious hardening effect."/>

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Indentation size effects and strain hardening of glassy Cu29Zr32Ti15Al5Ni19 during nanoindentation
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Affiliation:

School of Materials Engineering,Nanjing Institute of Technology

Clc Number:

TG 14

Fund Project:

National Natural Science Foundation of China；Innovation Training Program for College Students in Jiangsu Province

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    Abstract:

    A high entropy bulk metallic glass (HE-BMG) Cu29Zr32Ti15Al5Ni19 was investigated by nanoindentation in detail with load-controlled, continuous stiffness measurement (CSM) and cyclic loading mode, respectively. Pop-in occurs in this alloy during nanoindentation. Applied load have more influences on the pop-in events than loading rate does. When the applied load is larger than 40mN, obvious pop-in events can be observed in the loading curves even at high up to 5mN/s loading rate. Indentation size effect exists in this alloy, confirmed by the hardness decreasing with the increasing indentation load and a Meyer’s index n less than 2. The fraction of energy dissipated during indentation (Ed) changes within the range of 54%-60%. Cyclic loading tests reveal obvious hardening effect.

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[Jin-Hong Pi, Ya-Nan Yan, Rong-Xiang Wang, Ji-Li Wu. Indentation size effects and strain hardening of glassy Cu29Zr32Ti15Al5Ni19 during nanoindentation[J]. Rare Metal Materials and Engineering,2019,48(3):744~750.]
DOI：10.12442/j. issn.1002-185X.20170914

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History
  • Received:October 11,2017
  • Revised:February 20,2019
  • Adopted:December 13,2017
  • Online: April 10,2019
  • Published: