Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High Temperatures

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 crysta...

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Main Authors:	Gang Wang, Daoyuan Pan, Xinying Shi, Marko Huttula, Wei Cao, Yongjiang Huang
Format:	Article
Language:	English
Published:	MDPI AG 2018-06-01
Series:	Metals
Subjects:	metallic glasses creep modeling activation energy
Online Access:	http://www.mdpi.com/2075-4701/8/6/457

id	doaj-6e60d4d3d06348f98dc2229ae2cbef88
record_format	Article
spelling	doaj-6e60d4d3d06348f98dc2229ae2cbef882020-11-24T21:15:18ZengMDPI AGMetals2075-47012018-06-018645710.3390/met8060457met8060457Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High TemperaturesGang Wang0Daoyuan Pan1Xinying Shi2Marko Huttula3Wei Cao4Yongjiang Huang5Anhui Key Laboratory of High-Performance Non-ferrous Metal Materials, Anhui Polytechnic University, Wuhu 241000, ChinaAnhui Key Laboratory of High-Performance Non-ferrous Metal Materials, Anhui Polytechnic University, Wuhu 241000, ChinaNano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FIN-90014 Oulu, FinlandNano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FIN-90014 Oulu, FinlandNano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FIN-90014 Oulu, FinlandSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaThe 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 θ 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.http://www.mdpi.com/2075-4701/8/6/457metallic glassescreepmodelingactivation energy
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Gang Wang Daoyuan Pan Xinying Shi Marko Huttula Wei Cao Yongjiang Huang
spellingShingle	Gang Wang Daoyuan Pan Xinying Shi Marko Huttula Wei Cao Yongjiang Huang Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High Temperatures Metals metallic glasses creep modeling activation energy
author_facet	Gang Wang Daoyuan Pan Xinying Shi Marko Huttula Wei Cao Yongjiang Huang
author_sort	Gang Wang
title	Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High Temperatures
title_short	Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High Temperatures
title_full	Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High Temperatures
title_fullStr	Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High Temperatures
title_full_unstemmed	Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High Temperatures
title_sort	tensile creep characterization and prediction of zr-based metallic glass at high temperatures
publisher	MDPI AG
series	Metals
issn	2075-4701
publishDate	2018-06-01
description	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 θ 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.
topic	metallic glasses creep modeling activation energy
url	http://www.mdpi.com/2075-4701/8/6/457
work_keys_str_mv	AT gangwang tensilecreepcharacterizationandpredictionofzrbasedmetallicglassathightemperatures AT daoyuanpan tensilecreepcharacterizationandpredictionofzrbasedmetallicglassathightemperatures AT xinyingshi tensilecreepcharacterizationandpredictionofzrbasedmetallicglassathightemperatures AT markohuttula tensilecreepcharacterizationandpredictionofzrbasedmetallicglassathightemperatures AT weicao tensilecreepcharacterizationandpredictionofzrbasedmetallicglassathightemperatures AT yongjianghuang tensilecreepcharacterizationandpredictionofzrbasedmetallicglassathightemperatures
_version_	1716745739081613312

Tensile Creep Characterization and Prediction of Zr-Based Metallic Glass at High Temperatures

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