University of Oulu

Wang, G.; Pan, D.; Shi, X.; Huttula, M.; Cao, W.; Huang, Y. Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High Temperatures. Metals 2018, 8, 457.

Tensile creep characterization and prediction of Zr-based metallic glass at high temperatures

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Author: Wang, Gang1,2; Pan, Daoyuan1; Shi, Xinying2;
Organizations: 1Anhui Key Laboratory of High-Performance Non-ferrous Metal Materials, Anhui Polytechnic University, Wuhu 241000, China
2Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FIN-90014 Oulu, Finland
3School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.3 MB)
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Language: English
Published: Multidisciplinary Digital Publishing Institute, 2018
Publish Date: 2018-06-27


The high temperature creep behaviors of a Zr-based bulk metallic glass (BMG) are studied by uniaxial tensile creep experiments under applied stresses of 50–180 MPa at temperatures of 660–700 K. The microstructural observations of the BMG samples after creep tests show that crystalline phases can be detected under high temperature or high applied stress. Constitutive models for predicting the high temperature creep behaviors of the studied Zr-based BMG are established based on the Ɵ projection method. The creep activation energy and stress exponent are also calculated to establish the creep model. The parameters of the established models are found to be closely associated with the applied stress and temperature. The results show an excellent agreement between the measured and predicted results, confirming the validity of the established model to accurately estimate the high temperature creep curves for the Zr-based BMG. Moreover, based on the classical diffusion creep theory, a schematic model is proposed to describe the creep behaviors of BMGs from the framework of free volume theory.

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Series: Metals
ISSN: 2075-4701
ISSN-E: 2075-4701
ISSN-L: 2075-4701
Volume: 8
Issue: 6
Article number: 457
DOI: 10.3390/met8060457
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: This work was funded by the National Natural Science Foundation of China [grant numbers 51704001 and 51671070], Key Research and Development Plan of Anhui Province [grant number 1704a0902056], Key Project of Natural Science of Education Department of Anhui Province [grant number KJ2018A0860], and Talent Project of Anhui Polytechnic University [grant number 2017yyzr08].
Copyright information: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (