Mechanical Characterization of Nanocrystalline Materials via a Finite Element Nanoindentation Model

The difficulty of producing sufficient quantities of nanocrystalline materials for test specimens has led to an effort to explore alternative means for the mechanical characterization of small material volumes. In the present work, a numerical model simulating a nanoindentation test was developed us...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Konstantinos Tserpes, Panagiotis Bazios, Spiros G. Pantelakis, Maria Pappa, Nikolaos Michailidis
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	nanocrystalline materials finite element analysis inverse algorithm Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/272c3902dea24e678df584bfb239985e
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:272c3902dea24e678df584bfb239985e
record_format	dspace
spelling	oai:doaj.org-article:272c3902dea24e678df584bfb239985e2021-11-25T18:22:14ZMechanical Characterization of Nanocrystalline Materials via a Finite Element Nanoindentation Model10.3390/met111118272075-4701https://doaj.org/article/272c3902dea24e678df584bfb239985e2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1827https://doaj.org/toc/2075-4701The difficulty of producing sufficient quantities of nanocrystalline materials for test specimens has led to an effort to explore alternative means for the mechanical characterization of small material volumes. In the present work, a numerical model simulating a nanoindentation test was developed using Abaqus software. In order to implement the model, the principal material properties were used. The numerical nanoindentation results were converted to stress–strain curves through an inverse algorithm in order to obtain the macroscopic mechanical properties. For the validation of the developed model, nanoindentation tests were carried out in accordance with the ISO 14577. The composition of 75% wt. tungsten and 25% wt. copper was investigated by producing two batches of specimens with a coarse-grain microstructure with an average grain size of 150 nm and a nanocrystalline microstructure with a grain diameter of 100 nm, respectively. The porosity of both batches was derived to range between 9% and 10% based on X-ray diffraction analyses. The experimental nanoidentation results in terms of load–displacement curves show a good agreement with the numerical nanoindentation results. The proposed numerical technique combined with the inverse algorithm predicts the material properties of a fully dense, nanocrystalline material with very good accuracy, but it shows an appreciable deviation with the corresponding compression results, leading to the finding that the porosity effect is a crucial parameter which needs to be taken into account in the multiscale numerical methodology.Konstantinos TserpesPanagiotis BaziosSpiros G. PantelakisMaria PappaNikolaos MichailidisMDPI AGarticlenanocrystalline materialsfinite element analysisinverse algorithmMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1827, p 1827 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nanocrystalline materials finite element analysis inverse algorithm Mining engineering. Metallurgy TN1-997
spellingShingle	nanocrystalline materials finite element analysis inverse algorithm Mining engineering. Metallurgy TN1-997 Konstantinos Tserpes Panagiotis Bazios Spiros G. Pantelakis Maria Pappa Nikolaos Michailidis Mechanical Characterization of Nanocrystalline Materials via a Finite Element Nanoindentation Model
description	The difficulty of producing sufficient quantities of nanocrystalline materials for test specimens has led to an effort to explore alternative means for the mechanical characterization of small material volumes. In the present work, a numerical model simulating a nanoindentation test was developed using Abaqus software. In order to implement the model, the principal material properties were used. The numerical nanoindentation results were converted to stress–strain curves through an inverse algorithm in order to obtain the macroscopic mechanical properties. For the validation of the developed model, nanoindentation tests were carried out in accordance with the ISO 14577. The composition of 75% wt. tungsten and 25% wt. copper was investigated by producing two batches of specimens with a coarse-grain microstructure with an average grain size of 150 nm and a nanocrystalline microstructure with a grain diameter of 100 nm, respectively. The porosity of both batches was derived to range between 9% and 10% based on X-ray diffraction analyses. The experimental nanoidentation results in terms of load–displacement curves show a good agreement with the numerical nanoindentation results. The proposed numerical technique combined with the inverse algorithm predicts the material properties of a fully dense, nanocrystalline material with very good accuracy, but it shows an appreciable deviation with the corresponding compression results, leading to the finding that the porosity effect is a crucial parameter which needs to be taken into account in the multiscale numerical methodology.
format	article
author	Konstantinos Tserpes Panagiotis Bazios Spiros G. Pantelakis Maria Pappa Nikolaos Michailidis
author_facet	Konstantinos Tserpes Panagiotis Bazios Spiros G. Pantelakis Maria Pappa Nikolaos Michailidis
author_sort	Konstantinos Tserpes
title	Mechanical Characterization of Nanocrystalline Materials via a Finite Element Nanoindentation Model
title_short	Mechanical Characterization of Nanocrystalline Materials via a Finite Element Nanoindentation Model
title_full	Mechanical Characterization of Nanocrystalline Materials via a Finite Element Nanoindentation Model
title_fullStr	Mechanical Characterization of Nanocrystalline Materials via a Finite Element Nanoindentation Model
title_full_unstemmed	Mechanical Characterization of Nanocrystalline Materials via a Finite Element Nanoindentation Model
title_sort	mechanical characterization of nanocrystalline materials via a finite element nanoindentation model
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/272c3902dea24e678df584bfb239985e
work_keys_str_mv	AT konstantinostserpes mechanicalcharacterizationofnanocrystallinematerialsviaafiniteelementnanoindentationmodel AT panagiotisbazios mechanicalcharacterizationofnanocrystallinematerialsviaafiniteelementnanoindentationmodel AT spirosgpantelakis mechanicalcharacterizationofnanocrystallinematerialsviaafiniteelementnanoindentationmodel AT mariapappa mechanicalcharacterizationofnanocrystallinematerialsviaafiniteelementnanoindentationmodel AT nikolaosmichailidis mechanicalcharacterizationofnanocrystallinematerialsviaafiniteelementnanoindentationmodel
_version_	1718411245641531392

Mechanical Characterization of Nanocrystalline Materials via a Finite Element Nanoindentation Model

Ejemplares similares