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Advances and Locks in the Field of Residual Stresses in Metallic Material

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Dr. Guillaume Geandier

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Microstructures and Stresses Group, Science and Engineering of Materials and Metallurgy Department of the Jean Lamour Institute, CMRS UMR 7198, Université de Lorraine, Campus Artem, 2 allée André Guinier, BP 50840, CEDEX, 54011 Nancy, France
Interests: residual stresses; internal stresses; phase transformation; synchrotron X-ray diffraction
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Dr. Benoît Malard

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Institut National Polytechnique de Toulouse, Mechanics, Microstruture, Oxidation, Corrosion Team at the CIRIMAT laboratory, Université de Toulouse, CNRS, INP, ENSIACET - 4 allée Emile Monso BP44362, CEDEX 4, 31030 Toulouse, France
Interests: mechanical behavior of materials; shape memory alloys; additive manufacturing; austenitic stainless steels; aluminum alloys; cast iron; synchrotron X-ray and neutrons diffraction

Special Issue Information

Dear Colleagues,

During the manufacture of metallic components, residual stress is inevitably generated, which has a major influence on the structural integrity and service performance of products. Whether using traditional welding/assembly/forming processes or recently developed additive manufacturing processes, residual stress has always been a key factor that affects the reliability of mechanical structures.

The objective of this Special Issue is to review recent contributions to the technical and scientific advancements and challenges in residual stress analysis methods. Topics of interest include, but are not limited to, experimental, theoretical and simulation analyses of residual stress.

Authors are invited to publish the results of their research on all of these topics, which involve advancements that will broaden the field of stress analysis. Papers could concern the microstructures and/or atypical geometries characterized or in the development of specific and adaptive methodologies for residual stress analysis in metallic materials.

Dr. Guillaume Geandier
Dr. Benoît Malard
Guest Editors

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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

residual stresses
strain
internal stresses
metals
metallic alloys
metallic materials
microstructure

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Research

16 pages, 4418 KiB

Open AccessArticle

A Simple Calibration Method to Consider Plastic Deformation Influence on X-ray Elastic Constant Based on Peak Width Variation

by Ewann Gautier, Pierre Faucheux, Bruno Levieil, Laurent Barrallier, Sylvain Calloch and Cédric Doudard

Metals 2024, 14(1), 62; https://doi.org/10.3390/met14010062 - 04 Jan 2024

Viewed by 802

Abstract

The

\sin ² ψ

method is the general method for analyzing X-ray diffraction stress measurements. This method relies on the estimation of a parameter known as

\frac{1}{2} S_{2}^{h k l}

, which is generally considered as a material constant. [...] Read more.

The

\sin ² ψ

method is the general method for analyzing X-ray diffraction stress measurements. This method relies on the estimation of a parameter known as

\frac{1}{2} S_{2}^{h k l}

, which is generally considered as a material constant. However, various studies have shown that this parameter can be affected by plastic deformation leading to proportional uncertainties in the estimation of stresses. In this paper, in situ X-ray diffraction measurements are performed during a tensile test with unloads on a low-carbon high-strength steel. The calibrated

\frac{1}{2} S_{2}^{h k l}

parameter varies from

3.5 \times 10^{- 6}

MPa⁻¹ to

5.5 {\times 10}^{- 6}

Mpa⁻¹, depending on the surface condition and on the plastic strain state, leading to a maximum error on the stress level of 40% compared to reference handbook values. The results also show that plastic strain is responsible for 6 to 14% of the variation, depending on the initial surface sample condition. A method is then proposed to correct this variation based on the fit of the

\frac{1}{2} S_{2}^{h k l}

evolution with respect to the peak diffraction width, the latter being an indication of the plasticity state. It is shown that the proposed methodology improves the applied stress increment prediction, although the absolute stress value still depends on pseudo-macrostresses that also vary with plastic strain. Full article

(This article belongs to the Special Issue Advances and Locks in the Field of Residual Stresses in Metallic Material)

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21 pages, 1159 KiB

Open AccessArticle

Micromechanical Modeling for Predicting Residual Stress–Strain State around Nodules in Ductile Cast Irons

by Andrew Ruggiero and Ehsan Khademi

Metals 2023, 13(11), 1874; https://doi.org/10.3390/met13111874 - 10 Nov 2023

Viewed by 750

Abstract

In this paper, a micromechanical model was developed to predict the residual stress–strain state that is generated around nodules of a ferritic ductile cast iron during solidification. A finite element analysis was performed on a reference volume element of the material to analyze the local strain development, having modeled both matrix and nodule as deformable bodies in contact. The behavior of the nodule was assumed linear–elastic because of the low stresses to which it is subjected during cooling. On the other hand, elasto-plastic viscous behavior was considered for the matrix, considering both the primary and secondary creep regimes. To make up for the lack of information on the physical–thermomechanical properties of the constituents, the available literature data were integrated with the results obtained from the CALPHAD methodology applied to both cast iron and the steel that constitutes its matrix. The micromechanical model was validated by comparing the resulting residual strains with experimental data available in the literature for a ferritic ductile cast iron. Then, it was used for analyzing the correlation between the solidification history and the mechanical response of cast iron in terms of the uniaxial stress–strain curve. Full article

(This article belongs to the Special Issue Advances and Locks in the Field of Residual Stresses in Metallic Material)

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