Application of Nanoindentation in the Characterization of a Porous Material with a Clastic Texture
In materials science and engineering, a significant amount of research has been carried out using indentation techniques in order to characterize the mechanical properties and microstructure of a broad range of natural and engineered materials. However, there are many unresearched or partly research...
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doaj-c48d56e583e643789a71a31ae11bc53f2021-08-26T14:01:05ZengMDPI AGMaterials1996-19442021-08-01144579457910.3390/ma14164579Application of Nanoindentation in the Characterization of a Porous Material with a Clastic TextureSathwik S. Kasyap0Kostas Senetakis1Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong, ChinaDepartment of Architecture and Civil Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong, ChinaIn materials science and engineering, a significant amount of research has been carried out using indentation techniques in order to characterize the mechanical properties and microstructure of a broad range of natural and engineered materials. However, there are many unresearched or partly researched areas, such as, for example, the investigation of the shape of the indentation load–displacement curve, the associated mechanism in porous materials with clastic texture, and the influence of the texture on the constitutive behavior of the materials. In the present study, nanoindentation is employed in the analysis of the mechanical behavior of a benchmark material composed of plaster of Paris, which represents a brand of highly porous-clastic materials with a complex structure; such materials may find many applications in medicine, production industry, and energy sectors. The focus of the study is directed at the examination of the influence of the porous structure on the load–displacement response in loading and unloading phases based on nanoindentation experiments, as well as the variation with repeating the indentation in already indented locations. Events such as pop-in in the loading phase and bowing out and elbowing in the unloading phase of a given nanoindentation test are studied. Modulus, hardness, and the elastic stiffness values were additionally examined. The repeated indentation tests provided validations of various mechanisms in the loading and unloading phases of the indentation tests. The results from this study provide some fundamental insights into the interpretation of the nanoindentation behavior and the viscoelastic nature of porous-clastic materials. Some insights on the influence of indentation spacing to depth ratio were also obtained, providing scope for further studies.https://www.mdpi.com/1996-1944/14/16/4579nanoindentationhardnessmodulusporous structurepop-inelbowing |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sathwik S. Kasyap Kostas Senetakis |
spellingShingle |
Sathwik S. Kasyap Kostas Senetakis Application of Nanoindentation in the Characterization of a Porous Material with a Clastic Texture Materials nanoindentation hardness modulus porous structure pop-in elbowing |
author_facet |
Sathwik S. Kasyap Kostas Senetakis |
author_sort |
Sathwik S. Kasyap |
title |
Application of Nanoindentation in the Characterization of a Porous Material with a Clastic Texture |
title_short |
Application of Nanoindentation in the Characterization of a Porous Material with a Clastic Texture |
title_full |
Application of Nanoindentation in the Characterization of a Porous Material with a Clastic Texture |
title_fullStr |
Application of Nanoindentation in the Characterization of a Porous Material with a Clastic Texture |
title_full_unstemmed |
Application of Nanoindentation in the Characterization of a Porous Material with a Clastic Texture |
title_sort |
application of nanoindentation in the characterization of a porous material with a clastic texture |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2021-08-01 |
description |
In materials science and engineering, a significant amount of research has been carried out using indentation techniques in order to characterize the mechanical properties and microstructure of a broad range of natural and engineered materials. However, there are many unresearched or partly researched areas, such as, for example, the investigation of the shape of the indentation load–displacement curve, the associated mechanism in porous materials with clastic texture, and the influence of the texture on the constitutive behavior of the materials. In the present study, nanoindentation is employed in the analysis of the mechanical behavior of a benchmark material composed of plaster of Paris, which represents a brand of highly porous-clastic materials with a complex structure; such materials may find many applications in medicine, production industry, and energy sectors. The focus of the study is directed at the examination of the influence of the porous structure on the load–displacement response in loading and unloading phases based on nanoindentation experiments, as well as the variation with repeating the indentation in already indented locations. Events such as pop-in in the loading phase and bowing out and elbowing in the unloading phase of a given nanoindentation test are studied. Modulus, hardness, and the elastic stiffness values were additionally examined. The repeated indentation tests provided validations of various mechanisms in the loading and unloading phases of the indentation tests. The results from this study provide some fundamental insights into the interpretation of the nanoindentation behavior and the viscoelastic nature of porous-clastic materials. Some insights on the influence of indentation spacing to depth ratio were also obtained, providing scope for further studies. |
topic |
nanoindentation hardness modulus porous structure pop-in elbowing |
url |
https://www.mdpi.com/1996-1944/14/16/4579 |
work_keys_str_mv |
AT sathwikskasyap applicationofnanoindentationinthecharacterizationofaporousmaterialwithaclastictexture AT kostassenetakis applicationofnanoindentationinthecharacterizationofaporousmaterialwithaclastictexture |
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