Special Issue "Rolling of Metals"

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

Deadline for manuscript submissions: 30 April 2020.

Special Issue Editor

Prof. Reza Riahi
E-Mail Website
Guest Editor
Department of Mechanical, Automotive, and Materials Engineering, University of Windsor, Windsor, Ontario, Canada
Interests: Corrosion & coatings; Tribology and metal forming; Composites; Machining

Special Issue Information

Dear Colleagues,

Metal rolling remains a relevant deformation process employed for the high volume production of wrought metal sheets, plates, bars, pipes and rods that are used in subsequent metalworking processes. As rolled metal products continue to comprise a substantial portion of manufactured metal products, the rolling of metals has attained a position of major importance in the metalworking industry. The complexity of metal rolling includes the refinement of the metal microstructure and texture, which has a distinct influence on establishing the final mechanical properties of the metal and has led to extensive research in this field. High near-surface shear stress, along with the temperature have a distinct influence on the formation of oxides and surface layers of the rolled products. Therefore, the study of the complex interactions occurring at the work roll and rolled metal surface have yielded several research publications. These interactions have been noted to be influenced by the thermo-physical and mechanical properties as well as the surface conditions of the work roll and work piece; the lubrication conditions; and the rolling parameters engaged. The interactions at the work roll/work piece interface have also been observed to generate roll coating on the work roll surface, which has been thought to be beneficial to the rolling process and has been the subject of recent research in aluminum and titanium alloys. The back transfer of this adhesion of the work roll surface have been noted to result in surface defects on the rolled metal surface, which has also been a topic of interest in many articles. Nevertheless, research on metal rolling continues to yield many fruitful results.

For this Special Issue of Metals, we welcome reviews and articles in the areas of principle, computer-aided modeling, microstructural evolution, near-surface microstructure development and characterization, roll coating, lubrication (coolant), and the tribology of rolling.

Prof. Reza Riahi
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 1600 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

  • rolling
  • metalworking
  • roll coating
  • lubrication
  • microstructure
  • surface quality
  • hot rolling
  • cold rolling
  • work roll

Published Papers (4 papers)

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Research

Open AccessArticle
Enhancing the Mechanical Properties of AZ80 Alloy by Combining Extrusion and Three Pass Calibre Rolling
Metals 2020, 10(2), 249; https://doi.org/10.3390/met10020249 - 13 Feb 2020
Abstract
An AZ80 alloy with ultra-high strength and good ductility has been successfully prepared by a novel processing route of combining extrusion and caliber rolling. The caliber rolled (CRed) AZ80 alloy has a necklace grain structure with ultrafine dynamic recrystallized (DRXed) grains formed around [...] Read more.
An AZ80 alloy with ultra-high strength and good ductility has been successfully prepared by a novel processing route of combining extrusion and caliber rolling. The caliber rolled (CRed) AZ80 alloy has a necklace grain structure with ultrafine dynamic recrystallized (DRXed) grains formed around the micro-scale deformed grains, which is remarkably different from the uniform microstructure of as-extruded sample free from caliber rolling. In addition, both the deformed region and the DRXed part in CRed AZ80 alloy exhibit more random basal texture than that of the as-extruded sample. Furthermore, the CRed AZ80 alloy demonstrates an excellent comprehensive mechanical property with the ultimate tensile strength of 446MPa and elongation of 13%, respectively. These good mechanical properties of CRed AZ80 alloy can be attributed to the synthetic effects of necklace bimodal microstructure containing ultra-fine grains, profuse Mg17Al12 precipitates, and the modified texture. Full article
(This article belongs to the Special Issue Rolling of Metals)
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Open AccessArticle
Effect of Crown Shape of Rolls on the Distribution of Stress and Elastic Deformation for Rolling Processes
Metals 2019, 9(11), 1222; https://doi.org/10.3390/met9111222 - 14 Nov 2019
Abstract
The present work analyzes the influence of crown shape on the distribution of stresses and deformation for rolling processes. This study consists of a Finite Element Analysis considering combinations of crown shape for Back Up Roll and Work Roll, rolling forces, properties of [...] Read more.
The present work analyzes the influence of crown shape on the distribution of stresses and deformation for rolling processes. This study consists of a Finite Element Analysis considering combinations of crown shape for Back Up Roll and Work Roll, rolling forces, properties of materials and dimensions of rolls and strip. An analysis of the rolls based on a double cantilever model with the fulcrum of the beams in a centerline mill was carried out. The results show that maximum stress concentrations for all combinations of crown shape analyzed appear on both sides 787.4 mm from the mill centerline, exactly on the sides of the strip. In this area, the maximum stress for the best combination of crown shape is larger than in the centerline mill, increasing from 34.2 MPa to 163.0 MPa. This is proportional according to Hooke’s law for which strain of rolls increases from 3.4067 × 10−4 to 4.8368 × 10−4. The worst combinations of crown shapes were obtained when the shapes of the barrel are the same for the BUR and WR; for example: Combination 1 (BUR Positive–WR Positive), Combination 5 (BUR Flat–WR Flat), and Combination 9 (BUR Negative–WR Negative). Full article
(This article belongs to the Special Issue Rolling of Metals)
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Open AccessArticle
Root Cause Analysis of Surface Cracks in Heavy Steel Plates during the Hot Rolling Process
Metals 2019, 9(7), 801; https://doi.org/10.3390/met9070801 - 20 Jul 2019
Cited by 1
Abstract
This paper investigates the root cause of the formation of surface cracks on hot-rolled C–Mn constructional steel heavy plates. Cracks are rather evenly distributed over the surface in the form of colonies of cracks. Samples were cut from the heavy plate. The microstructure [...] Read more.
This paper investigates the root cause of the formation of surface cracks on hot-rolled C–Mn constructional steel heavy plates. Cracks are rather evenly distributed over the surface in the form of colonies of cracks. Samples were cut from the heavy plate. The microstructure of samples in the as-cast and hot-rolled states were studied using optical and electron microscopes as well as energy dispersive X-ray spectroscopy (EDS). Results show that cracks are heavily oxidized. De-carburized areas are also seen alongside cracks. The crack tip is in the form of a deer-horn, indicating that crack branching has taken place during deformation. The crack initiation sites are V-shaped grooves on the surface of as-cast slabs. Correlations between microstructures, processing parameters, and crack formation are discussed. Full article
(This article belongs to the Special Issue Rolling of Metals)
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Open AccessArticle
The Annealing Twins of Fe-20Mn-4Al-0.3C Austenitic Steels during Symmetric and Asymmetric Hot Rolling
Metals 2018, 8(11), 882; https://doi.org/10.3390/met8110882 - 29 Oct 2018
Cited by 2
Abstract
The present work investigates the annealing twins of Fe-20Mn-4Al-0.3C austenitic steels in symmetric hot rolling (SHR) and asymmetric hot rolling (ASHR). The average grain size is 26 (±9.6) μm and 11 (±7.0) μm for the tested steel in SHR and ASHR processes. The [...] Read more.
The present work investigates the annealing twins of Fe-20Mn-4Al-0.3C austenitic steels in symmetric hot rolling (SHR) and asymmetric hot rolling (ASHR). The average grain size is 26 (±9.6) μm and 11 (±7.0) μm for the tested steel in SHR and ASHR processes. The density of high angle grain boundary (HAGB) and annealing twin boundary increase with the decrease of grain size. The annealing twin is obviously higher in ASHR than in SHR. The linear relation model between the logarithm of twin boundary density and the logarithm of the grain size is established. The grain boundary migration is continuously generated during recrystallization in SHR process. The coincident site lattice (CSL) boundary proportion increases with local grain boundary continuing bugling and the migration direction of bugling grain boundary constantly changes. The tensile property of the tested steel is improved due to the effective grain refinement and high density of annealing twins caused by the severe strain in the ASHR process. The purpose of high density HAGB for austenitic steels is helpful to an improvement in mechanical properties. Full article
(This article belongs to the Special Issue Rolling of Metals)
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