Research on Microstructure and Mechanical Properties in Stainless Steel

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Structural Integrity of Metals".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 8139

Special Issue Editor


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Guest Editor
Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, 19 Armii Krajowej Av. 42-200 Czestochowa, Poland
Interests: material science; metallic materials; bimetallic/multilayer materials; foundries; coatings; microstructure; duplex steel and cast steel; manufacturing technology; wear; cracks

Special Issue Information

Dear Colleagues,

Stainless steels have their historical origin and development in the early 20th century. Therefore, as a group of engineering materials it can be said that they are mature. However, there is still much room for development in the applications of this material. In the field of metallurgical technology, one of the factors indicating the level of development is the level of stainless steel production. At present this is a very large group of materials which, for more than 50 years, regardless of prosperity or crisis periods, have constantly seen an annual increase in production of about 5%.

The basic application areas of stainless steels and cast steels are in constructions and elements exposed to aggressive environments. They are widely used in the fields of medicine, energy, nuclear, petrochemical plants, oil and gas offshore applications, chemical plants, pulp and paper industries, and the food industry.

The aim of this Special Issue is to collect high-quality research papers, short communications, and review articles concerning stainless and cast steels’ mechanical and functional properties, as well as their microstructural changes and evolution. We look forward to receiving your submissions.

Prof. Dr. Grzegorz Stradomski
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. 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

  • mechanical properties
  • microstructure changes and evolution
  • manufacturing technology
  • exploitation problems
  • crack and destruction

Published Papers (3 papers)

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Research

22 pages, 12917 KiB  
Article
Welding of Large Thickness Super Duplex Stainless Steel: Microstructure and Properties
by Maria Asuncion Valiente Bermejo, Daniel Eyzop, Kjell Hurtig and Leif Karlsson
Metals 2021, 11(8), 1184; https://0-doi-org.brum.beds.ac.uk/10.3390/met11081184 - 25 Jul 2021
Cited by 10 | Viewed by 3158
Abstract
In this study, Submerged Arc Welding (SAW) and Gas Metal Arc Welding (GMAW) processes were used in multi-pass welding of 33 mm thickness super duplex stainless steel plates. Recommended and higher than recommended arc energy and interpass temperatures were used. Both GMAW and [...] Read more.
In this study, Submerged Arc Welding (SAW) and Gas Metal Arc Welding (GMAW) processes were used in multi-pass welding of 33 mm thickness super duplex stainless steel plates. Recommended and higher than recommended arc energy and interpass temperatures were used. Both GMAW and SAW processes were able to produce large thickness weldments meeting the microstructural, mechanical, and corrosion resistance requirements, and also when using higher than recommended arc energy and interpass temperature. It was possible to reduce the number of welding passes by half when using higher than recommended arc energy and interpass temperature. The SAW process needed only half of the welding time required for the GMAW process to produce a weldment with nearly the same number of weld passes, when using recommended arc energy and interpass temperature. Based on the results of this investigation, the practical recommendations for welding large thicknesses should be revised and updated. Full article
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21 pages, 8064 KiB  
Article
Numerical Simulation of Some Steel Structural Elements with Uncertain Initial Porosity
by Marcin Kamiński and Michał Strąkowski
Metals 2021, 11(5), 689; https://0-doi-org.brum.beds.ac.uk/10.3390/met11050689 - 23 Apr 2021
Cited by 2 | Viewed by 1529
Abstract
The main research purpose of this work was to study the elasto-plastic responses of some fundamental steel structural elements exhibiting stochastic volumetric microvoids. The constitutive model of the steel material was consistent with the deterministic Gurson–Tvergaard–Needleman (GTN) porous plasticity model, where some of [...] Read more.
The main research purpose of this work was to study the elasto-plastic responses of some fundamental steel structural elements exhibiting stochastic volumetric microvoids. The constitutive model of the steel material was consistent with the deterministic Gurson–Tvergaard–Needleman (GTN) porous plasticity model, where some of the microvoids parameters have additionally been defined as Gaussian random variables. The iterative stochastic finite element method implemented based on the-tenth order stochastic perturbation technique was utilized in numerical experiments. An interoperability of the computer algebra system MAPLE 2019 and the finite element method system ABAQUS was employed to study the influence of the initial microvoids f0 with uncertainty in the structural steel on the statistical scattering of the resulting stresses and deformations. The basic probabilistic characteristics of the structural response were computed and contrasted with statistical estimators inherent in the Monte–Carlo simulation and also with the results obtained from the semi-analytical probabilistic method. Reliability indices according to the first-order reliability method (FORM) were also calculated. Two numerical illustrations included the (i) tension test of the round cylindrical steel rebar and the (ii) bending test of the steel I-beam restrained at both its ends. Expectations and coefficients of variation of the structural responses confirmed here the importance of the microvoids for the stochastic elasto-plastic behavior of some basic engineering structures, where tensile stress plays an important role in designing procedures. Full article
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18 pages, 24216 KiB  
Article
Microstructural Changes and Strengthening of Austenitic Stainless Steels during Rolling at 473 K
by Marina Odnobokova, Andrey Belyakov, Nariman Enikeev, Rustam Kaibyshev and Ruslan Z. Valiev
Metals 2020, 10(12), 1614; https://0-doi-org.brum.beds.ac.uk/10.3390/met10121614 - 30 Nov 2020
Cited by 21 | Viewed by 2735
Abstract
The microstructural changes in 304L and 316L austenitic stainless steels during plate rolling with 95% rolling reduction at a temperature of 473 K and their effect on strengthening were studied. The microstructure evolution was associated with deformation twinning and microshear banding. The latter [...] Read more.
The microstructural changes in 304L and 316L austenitic stainless steels during plate rolling with 95% rolling reduction at a temperature of 473 K and their effect on strengthening were studied. The microstructure evolution was associated with deformation twinning and microshear banding. The latter ones involved ultrafine crystallites, which rapidly evolved in strain-induced ultrafine austenite grains as a result of fast increase in misorientations between them. Besides the ultrafine austenite crystallite evolution, the microshear bands assisted local appearance of deformation martensite, which attained about 25 vol.% and 3 vol.% at total strain of 3 in 304L and 316L steels, respectively. Both the microshear banding and the martensitic transformation promoted the formation of ultrafine grains with a size of less than 1 µm. The strain dependence of the ultrafine grain fraction obeyed a modified Johnson-Mehl-Avrami-Kolmogorov function. The deformation grain size and dislocation density that develop during rolling could also be expressed by exponential functions of true strain. Incorporating the revealed relationships between the strain and the microstructural parameters into modified Hall–Petch-type equation, unique expression for the yield strength of processed steels was obtained. The dislocation strengthening was the largest contributor to the strength, especially at small to medium strains, although grain size strengthening increased during rolling approaching that from dislocations at large strains. Full article
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