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Metals
Special Issues
Small-Scale Properties of Materials
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Small-Scale Properties of Materials

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 May 2020) | Viewed by 8229

Special Issue Editor

Prof. Meysam Haghshenas

E-Mail Website
Guest Editor
Department of Mechanical Engineering, College of Engineering and Mine, University of North Dakota, Grand Forks, North Dakota, USA
Interests: length-scale mechanical properties (i.e., nanoindentation); metal additive manufacturing; fatigue

Special Issue Information

Dear Colleagues,

The characterization of mechanical properties, on micro- and nano-scales, is crucial for a fundamental understanding of materials behavior to assess other characteristics of materials in the actual service (i.e. elastic–plastic deformation, residual stresses, time-dependent creep and relaxation properties, fracture toughness, fatigue and yield strength). This special issue focuses on properties of materials at small-length scales from both theoretical/modeling and experimental viewpoints. The scope includes, but not limited to, the following areas:

  • Materials characterization through micro/nanoindentation testing
  • In-situ nanomechanical measurements in application environments (thermal, electrical, electrochemical, and biological stimuli)
  • Small scale testing of interfaces
  • Mechanical properties of thin films and coatings
  • Small scale quasistatic tests (tension, compression, bending, and torsional tests)
  • Small scale fatigue, creep and impact tests
  • Nano-scale measurements of strain and stress

Prof. Meysam Haghshenas
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Small-scale properties
  • Length-scale phenomena
  • Microindentation
  • Nanoindentation
  • Nanohardness
  • Small scale testing
  • Nanomechanical properties
  • Nanomechanics.

Published Papers (2 papers)

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Research

71 pages, 34294 KiB  
Article
Nanomechanical Characterization for Cold Spray: From Feedstock to Consolidated Material Properties
by Bryer C. Sousa, Matthew A. Gleason, Baillie Haddad, Victor K. Champagne, Jr., Aaron T. Nardi and Danielle L. Cote
Metals 2020, 10(9), 1195; https://doi.org/10.3390/met10091195 - 7 Sep 2020
Cited by 21 | Viewed by 5043
Abstract
Cold gas-dynamic spray is a solid-state materials consolidation technology that has experienced successful adoption within the coatings, remanufacturing and repair sectors of the advanced manufacturing community. As of late, cold spray has also emerged as a high deposition rate metal additive manufacturing method [...] Read more.
Cold gas-dynamic spray is a solid-state materials consolidation technology that has experienced successful adoption within the coatings, remanufacturing and repair sectors of the advanced manufacturing community. As of late, cold spray has also emerged as a high deposition rate metal additive manufacturing method for structural and nonstructural applications. As cold spray enjoys wider recognition and adoption, the demand for versatile, high-throughput and significant methods of particulate feedstock as well consolidated materials characterization has also become more notable. In order to address the interest for such an instrument, nanoindentation is presented herein as a viable means of achieving the desired mechanical characterization abilities. In this work, conventionally static nanoindentation testing using both Berkovich and spherical indenter tips, as well as nanoindentation using the continuous stiffness measurement mode of testing, will be applied to a range of powder-based feedstocks and cold sprayed materials. Full article
(This article belongs to the Special Issue Small-Scale Properties of Materials)
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11 pages, 5132 KiB  
Article
Heterogeneous Distribution of Microstrain Evolved During Tensile Deformation of Polycrystalline Plain Low Carbon Steel
by Hai Qiu, Rintaro Ueji, Yuuji Kimura and Tadanobu Inoue
Metals 2020, 10(6), 774; https://doi.org/10.3390/met10060774 - 10 Jun 2020
Cited by 7 | Viewed by 2647
Abstract
On a macroscale, the stress–strain curve of polycrystalline steel exhibits perfectly linear behavior in the elastic tension region. We observed that the strain distribution within grains is inhomogeneous in the range of the elastic deformation region. Microstrain concentrates at some local sites which [...] Read more.
On a macroscale, the stress–strain curve of polycrystalline steel exhibits perfectly linear behavior in the elastic tension region. We observed that the strain distribution within grains is inhomogeneous in the range of the elastic deformation region. Microstrain concentrates at some local sites which are at and near the grain boundaries or in the interior of the grains. The microstrain is pseudo-periodic, and its period increases with applied stress, tending to approach the grain size. In addition to the tension-strain concentration, the compression-strain concentration is even present in the elastic region. The pseudo-periodic and inhomogeneous microstrain is attributed to the orientation heterogeneity of grains in polycrystalline steel. Full article
(This article belongs to the Special Issue Small-Scale Properties of Materials)
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