Special Issue "Instrumented Indentation Test: An Aiding Tool for Materials Science and Industry"

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 30 October 2020.

Special Issue Editors

Prof. Giovanni Maizza
Website
Guest Editor
Politecnico di Torino, Turin, Italy
Interests: instrumented indentation testing; contact mechanics; micro–macro modeling of the multiphysical processing of materials; microstructure design of materials; microstructure–property–process parameter relationships
Prof. Dongil Kwon
Website
Co-Guest Editor
Seoul National University
Interests: instrumented indentation testing; residual stress measurement; reliability assessment

Special Issue Information

Dear Colleagues,

It is believed that the instrumented indentation test (IIT) will revolutionize the industry in the next two decades, while continuing to lead to new elucidations about the nature and behavior of materials. It shares the same mechanical fundamentals as a conventional indentation test (IT), but it also permits a multitude of indentation properties, other than hardness, to be extracted in a quick, easy, and nondestructive manner. As such, it can be used either in offline or online manufacturing processes to assess the final mechanical performances of a part or to optimize the most relevant process parameters. IIT is particularly suitable for additive manufactured products, welded joints, and microelectromechanical devices, which generally lack a standard structural assessment. Although IIT can virtually be performed over nano-, micro- and macrodimensional scales, over the last decade, research into IIT has been dominated by nano-IIT studies, which have had a great impact on the progress of materials science and the thin film and coating industry. However, even greater impacts may be expected in the industrial sectors if macro-IIT comes into play, provided that appropriate guidelines are available. Macro-indentation properties correlate more naturally with the familiar tensile-like properties than nano-IIT ones do; thus, the macro-instrumented indentation test will offer an unprecedent viable nondestructive means of measuring tensile-like elastoplastic properties at a local scale in a wide range of metals and engineering alloys. The primary goal of this Special Issue is to present the recent advances in IIT research, with particular attention to macro-IIT achievements. The secondary goal is to provide comprehensive fundamental knowledge on IIT methodologies along with useful guidelines that are not covered by any available national or international standard, to permit IIT techniques to be exploited in new research and engineering fields. 

Prof. Giovanni Maizza
Prof. Dongil Kwon
Guest Editors

Manuscript Submission Information

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Keywords

  • Instrumented indentation
  • Indentation theory and modeling
  • Residual stress measurement
  • Field-assisted indentation
  • Materials: conventional bulk as well as nanocrystalline and porous metals and alloys
  • similar and dissimilar welded joints
  • Materials behavior: elastoplatic, superplastic, superelastic, recrystallization, creep, anisotropic
  • New in situ and ex situ inspection methodologies aiding materials characterization during indentation

Published Papers (1 paper)

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Research

Open AccessArticle
Relationship of Stiffness-Based Indentation Properties Using Continuous-Stiffness-Measurement Method
Materials 2020, 13(1), 97; https://doi.org/10.3390/ma13010097 - 24 Dec 2019
Abstract
The determination of elastic modulus (E) and hardness (H) relies on the accuracy of the contact area under the indenter tip, but this parameter cannot be explicitly measured during the nanoindentation process. This work presents a new approach that [...] Read more.
The determination of elastic modulus (E) and hardness (H) relies on the accuracy of the contact area under the indenter tip, but this parameter cannot be explicitly measured during the nanoindentation process. This work presents a new approach that can derive the elastic modulus (E) and contact depth (hc) based on measured experiment stiffness using the continuous-stiffness-measurement (CSM) method. To achieve this, an inverse algorithm is proposed by incorporating a set of stiffness-based relationship functions that are derived from combining the dimensional analysis approach and computational simulation. This proposed solution considers both the sink-in and pile-up contact profiles; therefore, it provides a more accurate solution when compared to a conventional method that only considers the sink-in contact profile. While the proposed solution is sensitive to Poisson’s ratio (ν) and the equivalent indentation conical angle (θ), it is not affected by material plasticity, including yield strength (σy) and work hardening (n) for the investigated range of 0.001 < σy/E < 0.5. The proposed stiffness-based approach can be used to consistently derive elastic modulus and hardness by using stiffness and the load-and-unload curve measured by the continuous-stiffness-measurement (CSM) method. Full article
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