Optimization of the procedure for determining integral texture parameters of products from zirconium-based alloys using the orientation distribution function

Perlovich, Yuriy; Isaenkova, Margarita; Krymskaya, Olga; Fesenko, Vladimir; Babich, Ya. А.

doi:10.1088/1757-899x/130/1/012056

Cited by 10 publications

(4 citation statements)

References 4 publications

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“…The diffraction spectra were processed using a licensed software for the D8 Discover Bruker diffractometer (Bruker AXS GmbH, Karlsruhe, Germany) that enabled calculating the mass fraction of phases from the intensity of the recorded X-ray diffractions [ 24 ]. Analysis of the crystallographic texture was conducted by recording incomplete direct pole figures (DPFs) via the tilt method [ 25 , 26 ] with the use of reflections for the α-phase: (10.0), (10.2), (11.0), (20.2), (11.4). The complete DPFs (0001), {11.0} and {10.0} were restored using the LaboTex software Version 3.0 (LaboSoft s.c., Krakow, Poland) [ 27 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of the Texture of the Ultrafine-Grained Ti-6Al-4V Titanium Alloy on Impact Toughness

Modina¹,

D’yakonov²,

Stotskiy³

et al. 2023

Materials

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In this work, the strength properties and impact toughness of the ultrafine-grained (UFG) Ti-6Al-4V titanium alloy produced by severe plastic deformation (SPD) in combination with upsetting were studied, depending on the direction of crack propagation. In the billets processed by equal-channel angular pressing (ECAP), the presence of anisotropy of ultimate tensile strength (UTS) and ductility was observed, conditioned by the formation of a metallographic and crystallographic texture. At the same time, the ECAP-processed UFG alloy exhibited satisfactory values of impact toughness, ~0.42 MJ/m2. An additional upsetting of the ECAP-processed billet simulated the processes of shape forming/die forging and was accompanied by the development of recovery and recrystallization. This provided the “blurring” of texture and a reduction in the anisotropy of UTS and ductility, but a difference in impact toughness in several directions of fracture was still observed. It is shown that texture evolution during upsetting provided a significant increase in the crack propagation energy. The relationship between microstructure, texture and mechanical properties in different sections of the material under study is discussed.

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Section: Methodsmentioning

confidence: 99%

Effect of the Texture of the Ultrafine-Grained Ti-6Al-4V Titanium Alloy on Impact Toughness

Modina¹,

D’yakonov²,

Stotskiy³

et al. 2023

Materials

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“…A LaB 6 sample was used as a reference. For traditional X-ray texture analysis on a DRON-3 diffractometer with chrome radiation, a composite sample was prepared from narrow tube segments, the middle part of which was perpendicular to the radial (R) direction of the tube, as shown in [22][23][24]. Further, the investigated sections of tubes will be denoted according to orientation with the surface under study, for example, R-section is a section perpendicular to the R-direction of the tube.…”

Section: Methodsmentioning

confidence: 99%

Regularities of Changes in the Structure of Different Phases of Deformed Zirconium Alloys as a Result of Raising the Annealing Temperature According to Texture Analysis Data

Isaenkova,

Krymskaya,

Klyukova

et al. 2023

Metals

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Based on the data of synchrotron and electron microscopic studies of deformed and annealed Russian zirconium alloys, the possibility of analyzing the structural-phase state and crystallographic texture of individual phases has been demonstrated. A qualitative and quantitative phase analysis of deformed and annealed tubes made of Zr-Nb-(Sn-Fe-O) alloys was carried out using diffraction patterns obtained with synchrotron radiation. The main α-Zr phase and the following additional phases: β-Nb, β-Zr, and the Laves phase (intermetallic compound Zr(Nb,Fe)2), were found in the alloys. According to the results of texture analysis of all phases present in the alloy, the mechanisms of plastic deformation, recrystallization, and phase transformations of the main and additional phases were established. It is shown that during plastic deformation of the Zr-1%Nb alloy, a dynamic phase transformation β-Nb→α-Zr→β-Zr is observed. It is established that during recrystallization, larger grains of α-Zr are misoriented relative to the deformed matrix by rotating the prismatic axes around the basal axes by 30°, while fine grains are improved by polygonization and maintain the orientation of the deformed matrix. Processes for changing the orientation of grains of additional phases as a result of high-temperature annealing are also considered.

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“…The mass fraction of the phases was calculated from the intensity of the recorded X-ray patterns [21]. Analysis of the crystallographic texture was carried out by recording partial direct pole figures (DPF) applying the tilt method [22,23] using reflections for the α phase: (10.0), (10.2), (11.0), (20.2) and (11.4). Full DPFs (0001), {11.0} and {10.0} were reconstructed using the Labotex software v.3.0 (LaboSoft s.c., Krakow, Poland) [24].…”

Section: Methodsmentioning

confidence: 99%

Effect of Texture on the Ductile–Brittle Transition Range and Fracture Mechanisms of the Ultrafine-Grained Two-Phase Ti-6Al-4V Titanium Alloy

Modina,

Dyakonov,

Polyakov

et al. 2023

Metals

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In this work, the technique of equal-channel angular pressing (ECAP) that enables producing bulk billets was used to form a UFG structure in Ti-6Al-4V alloy. A subsequent warm upsetting simulates die forging and the production of a part. We studied the evolution of the UFG alloy’s crystallographic texture in the process of deformation during the production of a semi-product and/or a part, as well as its effect on the ductile–brittle transition region in the temperature range from −196 °C to 500 °C and the material’s fracture mechanisms. To test Charpy impact strength, standard samples of square cross-section with a V-shape notch were used (KCV). It was found that the impact toughness anisotropy is caused by textural effects and has a pronounced character at temperatures in the ductile–brittle transition range. Up to 100 °C the KCV values are close in the specimens processed by ECAP and ECAP+upsetting (along and perpendicularly to the upsetting axis—along the Z-axis and along the Y-axis, respectively), while a large difference is observed at test temperatures of 200 °C and higher. At a temperature of 500 °C, the impact toughness of the UFG Ti-6Al-4V alloy after ECAP reaches a level of that after ECAP+upsetting in the fracture direction along the Z-axis (1.60 and 1.77 MJ/m2, respectively). Additionally, an additional ECAP upsetting after ECAP decreases the ductile–brittle transition temperature of the UFG Ti-6Al-4V alloy, which increases the temperature margin of the toughness of the structural material and reduces the risk of the catastrophic failure of a product. The fractographic analysis of the fracture surface of the specimens after Charpy tests in a wide temperature range revealed the features of crack propagation depending on the type of the alloy’s microstructure and texture in the fracture direction.

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Optimization of the procedure for determining integral texture parameters of products from zirconium-based alloys using the orientation distribution function

Cited by 10 publications

References 4 publications

Effect of the Texture of the Ultrafine-Grained Ti-6Al-4V Titanium Alloy on Impact Toughness

Effect of the Texture of the Ultrafine-Grained Ti-6Al-4V Titanium Alloy on Impact Toughness

Regularities of Changes in the Structure of Different Phases of Deformed Zirconium Alloys as a Result of Raising the Annealing Temperature According to Texture Analysis Data

Effect of Texture on the Ductile–Brittle Transition Range and Fracture Mechanisms of the Ultrafine-Grained Two-Phase Ti-6Al-4V Titanium Alloy

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