Estimation of creep constitutive equation by creep indentation test using cylindrical indenter

The creep exponent, n, and creep coefficient, k, in Norton’s law characterizes the creep deformation of a high-temperature material. For identifying the creep constants, the uniaxial creep test is generally conducted. However, it is required to prepare many round-type cylindrical specimens. As an al...

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Autores principales:	Tomomichi DOI, Masayuki ARAI, Kiyohiro ITO
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	creep indentation cylinder indenter creep constitutive equation pure aluminum Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/48005669b7614bfb9b2366078bfc1a0a
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spelling	oai:doaj.org-article:48005669b7614bfb9b2366078bfc1a0a2021-11-29T05:59:26ZEstimation of creep constitutive equation by creep indentation test using cylindrical indenter2187-974510.1299/mej.20-00232https://doaj.org/article/48005669b7614bfb9b2366078bfc1a0a2020-07-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/4/7_20-00232/_pdf/-char/enhttps://doaj.org/toc/2187-9745The creep exponent, n, and creep coefficient, k, in Norton’s law characterizes the creep deformation of a high-temperature material. For identifying the creep constants, the uniaxial creep test is generally conducted. However, it is required to prepare many round-type cylindrical specimens. As an alternative to the uniaxial creep test, we proposed the indentation creep test using a spherical ball. However, this creep test has to be interrupted to evaluate the progression of impression size with dwelling time. To prevent the need for such complicated procedure, a simple estimation method based on the indentation creep test using a cylindrical indenter was developed in this study. This method allows us to directly estimate the creep constants from the relationship between impression pressure and penetration rate, which can be continuously measured during testing. A fundamental formula was derived in this study based on a cavity model introduced by Johnson, and it was subsequently corrected using finite element analysis. To check verification of this method, the creep indentation test was conducted on pure aluminum A1050 plates using a cylindrical alumina indenter. It was confirmed that the creep constants estimated from the developed method perfectly coincide with those estimated by conventional methods such as the uniaxial creep and ball indentation tests. Furthermore, it was inferred that the testing procedure of the developed method is simpler than those of the other methods, which is an advantage of usage of this method.Tomomichi DOIMasayuki ARAIKiyohiro ITOThe Japan Society of Mechanical Engineersarticlecreep indentationcylinder indentercreep constitutive equationpure aluminumMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 4, Pp 20-00232-20-00232 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	creep indentation cylinder indenter creep constitutive equation pure aluminum Mechanical engineering and machinery TJ1-1570
spellingShingle	creep indentation cylinder indenter creep constitutive equation pure aluminum Mechanical engineering and machinery TJ1-1570 Tomomichi DOI Masayuki ARAI Kiyohiro ITO Estimation of creep constitutive equation by creep indentation test using cylindrical indenter
description	The creep exponent, n, and creep coefficient, k, in Norton’s law characterizes the creep deformation of a high-temperature material. For identifying the creep constants, the uniaxial creep test is generally conducted. However, it is required to prepare many round-type cylindrical specimens. As an alternative to the uniaxial creep test, we proposed the indentation creep test using a spherical ball. However, this creep test has to be interrupted to evaluate the progression of impression size with dwelling time. To prevent the need for such complicated procedure, a simple estimation method based on the indentation creep test using a cylindrical indenter was developed in this study. This method allows us to directly estimate the creep constants from the relationship between impression pressure and penetration rate, which can be continuously measured during testing. A fundamental formula was derived in this study based on a cavity model introduced by Johnson, and it was subsequently corrected using finite element analysis. To check verification of this method, the creep indentation test was conducted on pure aluminum A1050 plates using a cylindrical alumina indenter. It was confirmed that the creep constants estimated from the developed method perfectly coincide with those estimated by conventional methods such as the uniaxial creep and ball indentation tests. Furthermore, it was inferred that the testing procedure of the developed method is simpler than those of the other methods, which is an advantage of usage of this method.
format	article
author	Tomomichi DOI Masayuki ARAI Kiyohiro ITO
author_facet	Tomomichi DOI Masayuki ARAI Kiyohiro ITO
author_sort	Tomomichi DOI
title	Estimation of creep constitutive equation by creep indentation test using cylindrical indenter
title_short	Estimation of creep constitutive equation by creep indentation test using cylindrical indenter
title_full	Estimation of creep constitutive equation by creep indentation test using cylindrical indenter
title_fullStr	Estimation of creep constitutive equation by creep indentation test using cylindrical indenter
title_full_unstemmed	Estimation of creep constitutive equation by creep indentation test using cylindrical indenter
title_sort	estimation of creep constitutive equation by creep indentation test using cylindrical indenter
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/48005669b7614bfb9b2366078bfc1a0a
work_keys_str_mv	AT tomomichidoi estimationofcreepconstitutiveequationbycreepindentationtestusingcylindricalindenter AT masayukiarai estimationofcreepconstitutiveequationbycreepindentationtestusingcylindricalindenter AT kiyohiroito estimationofcreepconstitutiveequationbycreepindentationtestusingcylindricalindenter
_version_	1718407582135091200

Estimation of creep constitutive equation by creep indentation test using cylindrical indenter

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