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Structural Phenomena in Modern Metallic Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (28 February 2021) | Viewed by 3028

Special Issue Editor


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Guest Editor
Institut of Physics of Materials, Czech Academy of Sciences, Brno, Czech Republic
Interests: thermo-mechanical treatment; non-ferrous metals; structure and stress analyses; numerical methods
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Special Issue Information

Dear Colleagues and Researchers,

The ever-increasing requirements of industry and commerce on the performance and longevity of components produced from metallic materials have encouraged the research and development of innovative engineering materials based on iron/steel, and other nonferrous metals. The properties of modern materials and alloys ensue from their structures, which can primarily be affected by their chemical composition and the distribution of the individual elements/phases, as well as by applied preparation/production technologies.

A favourable way to effectively enhance the properties of metallic materials is grain refinement. However, other structural phenomena, such as substructure development, volumes and types of grains boundaries, texture formation, as well as the possible occurrence of residual stress and mutual diffusion of the individual phases non-negligibly affect the final mechanical and utility properties, too.

Nonconventional forming technologies, such as severe plastic deformation (SPD) processes, conventional forming processes in combination with thermomechanical treatments, and optimized heat treatments all represent advantageous means to modify the structures of metallic materials in order to significantly improve their performance. Especially, the application of optimized modern forming technologies on alloys and compounds featuring innovative chemical compositions can lead to exceptional structure characteristics providing the final material with superior performance.

It is my pleasure to invite you to submit your scientific manuscripts to the presented Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Lenka Kunčická

Guest Editor

Manuscript Submission Information

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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. Materials is an international peer-reviewed open access semimonthly 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

  • (sub)structure characterization
  • residual stress
  • texture
  • grains and boundaries
  • precipitation
  • dislocations
  • lattice parameters
  • structure phases
  • diffusion

Published Papers (1 paper)

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Research

15 pages, 3757 KiB  
Article
Texture and Differential Stress Development in W/Ni-Co Composite after Rotary Swaging
by Pavel Strunz, Radim Kocich, David Canelo-Yubero, Adéla Macháčková, Přemysl Beran and Ludmila Krátká
Materials 2020, 13(12), 2869; https://doi.org/10.3390/ma13122869 - 26 Jun 2020
Cited by 13 | Viewed by 2577
Abstract
Knowledge of texture and residual stresses in tungsten heavy pseudoalloys is substantial for the microstructure optimization. These characteristics were determined in cold and warm rotary swaged W/NiCo composite with help of neutron diffraction. The results were discussed in view of the observed microstructure [...] Read more.
Knowledge of texture and residual stresses in tungsten heavy pseudoalloys is substantial for the microstructure optimization. These characteristics were determined in cold and warm rotary swaged W/NiCo composite with help of neutron diffraction. The results were discussed in view of the observed microstructure and mechanical properties. The investigated bars consisted of tungsten agglomerates (bcc lattice) surrounded by NiCo-based matrix (fcc lattice). No preferential crystallographic orientation was found in the as-sintered bar. A strong texture was formed in both the tungsten agglomerates (<101> fiber texture parallel to the swaging axis) and in the NiCo-based matrix (<111> fiber texture) after rotary swaging. Although usually of double-fiber texture, the <001> fiber of the fcc structures was nearly missing in the matrix. Further, the cold-swaged bar exhibited substantially stronger texture for both phases which corresponds to the higher measured ultimate tensile strength. The residual stress differences were employed for characterization of the stress state of the bars. The largest residual stress difference (≈400 MPa) was found at the center of the bar deformed at room temperature. The hoop stresses were non-symmetrical with respect to the swaging axis, which was likely caused by the elliptical cross section of the as-sintered bar. Full article
(This article belongs to the Special Issue Structural Phenomena in Modern Metallic Materials)
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