Combination of ECAP Process and Heat Treatment to Achieve Refining Structure of Selected Magnesium Alloys

Rusz, Stanislav; Čížek, L.; Hadasik, E.; Donic, Tibor; Tylšar, Stanislav; Salajka, Michal; Kedroň, Jan; Klos, Marcel; Bobek, Petr

doi:10.1002/9781118792148.ch404

Cited by 4 publications

(6 citation statements)

References 22 publications

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“…After further passages, the increase in hardness is slower. It is also evident from the graph that the increase in hardness of the surface layer with the increasing number of passages is greater than in the cross section, which is in accordance with the analysis of the deformation in the material volume based on the computer simulation [12].…”

Section: Hardness and Mechanical Propertiessupporting

confidence: 85%

“…Research areas of the SPD processes as ECAP and the DRECE method are intensively developed [8,9]. The effectiveness of this method is evaluated by the use of different simulations [10][11][12]. Appropriate adjustments of the forming tool have been designed to achieve a higher intensity of deformation.…”

Section: Introductionmentioning

confidence: 99%

“…It allows obtaining the UFG structure. With the use of the simulation [12] the SPD is predicted to increase the intensity of deformation after 5 -6 passes to a value  max = 3.5, which is a region of medium deformation levels. The investigation of a new shear deformation method for the production of nanostructures in low-carbon steel was analysed by Raab et al [13].…”

Section: Introductionmentioning

confidence: 99%

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Effect of severe plastic deformation on mechanical and fatigue behaviour of medium-c sheet steel

Rusz

Hilšer

Ochodek

et al. 2020

J min metall B Metall

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The DRECE method belongs to the severe plastic deformation (SPD) processes used for the refinement of sheet metal elements. A forming device used in this method is currently being installed in the workplace in the Centre of Advanced Innovation Technologies, VSB Technical University of Ostrava. In the present work the structural characteristics and fracture morphology of Ck55 carbon steel after the application of the DRECE method with a forming tool angle of 118? are presented. The microstructure results are linked to selected mechanical properties. The tensile, hardness, and fatigue tests are performed. The methodology of non-destructive residual stresses measurement in the carbon steel after the extrusion and application of tensile tests on small samples are important for their use in technical practice. The paper presents the original results of selected properties after the application of the DRECE method on Ck55 steel, which will be used in the future to assess the application of the DRECE method and to determine other directions of the processing of ferrous alloys and steels.

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Section: Hardness and Mechanical Propertiessupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of severe plastic deformation on mechanical and fatigue behaviour of medium-c sheet steel

Rusz

Hilšer

Ochodek

et al. 2020

J min metall B Metall

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“…ECAP, KoBo extrusion [14][15][16][17]. However, application of SPD methods to process magnesium alloys with the increased aluminum content in the as-cast state is impossible, therefore heat treatment before processing of those is recommended.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Selected Magnesium-Aluminum Alloys Prepared for SPD Processing Technology

Čížek

Rusz

Hilšer

et al. 2017

Archives of Metallurgy and Materials

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A growing interest in wrought magnesium alloys has been noticed recently, mainly due to development of various SPD (severe plastic deformation) methods that enable significant refinement of the microstructure and -as a result -improvement of various functional properties of products. However, forming as-cast magnesium alloys with the increased aluminum content at room temperature is almost impossible. Therefore, application of heat treatment before forming or forming at elevated temperature is recommended for these alloys. The paper presents the influence of selected heat treatment conditions on the microstructure and the mechanical properties of the as-cast AZ91 alloy. Deformation behaviour of the as-cast AZ61 alloy at elevated temperatures was analysed as well. The microstructure analysis was performed by means of both light microscopy and SEM. The latter one was used also for fracture analysis. Moreover, the effect of chemical composition modification by lithium addition on the microstructure of the AZ31-based alloy is presented. The test results can be helpful in preparation of the magnesium-aluminum alloys for further processing by means of SPD methods.

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“…Plastic worked magnesium alloys would be used sporadically, which resulted from technological difficulties connected with plastic working as well as high production costs. Low formability of magnesium alloys at temperatures up to 200°C resulted from a limited number of slip systems in the hexagonal lattice [8][9][10][11]. Consequently, the number of alloys processed by plastic working is considerably smaller than that of casting alloys.…”

mentioning

confidence: 99%

Fatigue Characteristics of Selected Light Metal Alloys

Cieśla¹,

Junak²,

Marek³

2016

Archives of Metallurgy and Materials

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The paper addresses results of fatigue testing of light metal alloys used in the automotive as well as aerospace and aviation industries, among others. The material subject to testing comprised hot-worked rods made of the AZ31 alloy, the Ti-6Al-4V two-phase titanium alloy and the 2017A (T451) aluminium alloy. Both low- and high-cycle fatigue tests were conducted at room temperature on the cycle asymmetry ratio of R=-1. The low-cycle fatigue tests were performed using the MTS-810 machine on two levels of total strain, i.e.Δεc= 1.0% and 1.2%. The high-cycle fatigue tests, on the other hand, were performed using a machine from VEB Werkstoffprufmaschinen-Leipzig under conditions of rotary bending. Based on the results thus obtained, one could develop fatigue life characteristics of the materials examined (expressed as the number of cycles until failure of sample Nf) as well as characteristics of cyclic material strain σa=f(N) under the conditions of low-cycle fatigue testing. The Ti-6Al-4V titanium alloy was found to be characterised by the highest value of fatigue life Nf, both in lowand high-cycle tests. The lowest fatigue life, on the other hand, was established for the aluminium alloys examined. Under the high-cycle fatigue tests, the life of the 2017A aluminium and the AZ31 magnesium alloy studied was determined by the value of stress amplitude σa. With the stress exceeding 150 MPa, it was the aluminium alloy which displayed higher fatigue life, whereas the magnesium alloy proved better on lower stress.

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Combination of ECAP Process and Heat Treatment to Achieve Refining Structure of Selected Magnesium Alloys

Cited by 4 publications

References 22 publications

Effect of severe plastic deformation on mechanical and fatigue behaviour of medium-c sheet steel

Effect of severe plastic deformation on mechanical and fatigue behaviour of medium-c sheet steel

Microstructure and Properties of Selected Magnesium-Aluminum Alloys Prepared for SPD Processing Technology

Fatigue Characteristics of Selected Light Metal Alloys

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