Methodological aspects of the quantitative texture analysis of HCP Alloy (Ti, Zr) sheet semiproducts

Dzunovich, D.A.; Betsofen, S. Ya.; Pаnin, P.V.

doi:10.1134/s0036029517100056

Cited by 4 publications

(7 citation statements)

References 11 publications

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“…To quantify the texture of hexagonal materials, Kearns texture parameters are often used [5][6][7][8]. These coefficients, (the index j means the corresponding direction in the sample ND, RD, or TD), show the degree of coincidence of the c-axes of the crystalline hexagonal cell of grains with a given geometric direction in a polycrystalline material.…”

Section: Resultsmentioning

confidence: 99%

“…Correlations of the anisotropy of the damage parameter and mechanical characteristics with the total value of the pole density exceeding unity at the IPF of the ND have been found. The Kearns texture parameters more objectively describe the texture of materials with a hexagonal structure [5][6][7]. In addition, the Kearns texture parameters make it possible to estimate the value of the physical and mechanical properties (for example, elastic) of a polycrystalline material with a hexagonal structure from the known characteristics of the corresponding single crystal [8].…”

Section: Introductionmentioning

confidence: 99%

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Kearns texture parameters, mechanical properties and damageability of titanium sheet after alternating bending

Usov

Shkatulyak

Savchuk

et al. 2021

Phys. Chem. Solid St.

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This work aims to determine the Kearns texture parameters and evaluate on their basis the elastic moduli, mechanical properties (ultimate tensile strength, conditional yield stress), as well as damageability parameters of the sheets commercial titanium (CT-grade 1: 0.04% Fe; 0.015% C; 0.05% N 0.05% c; 0.009% H) as delivered after rolling and annealing at 840°C (original sheet) and further alternating bending (AB) in the amount of 0.5; 1, 3 and 5 cycles. Damageability parameters characterizing damage accumulation were determined from the elastic modulus change after the above-mentioned number of AB cycles relative to the values of the elastic modulus in different directions of the original sheet of the studied titanium. The elastic constants of the single crystal and the Kearns texture parameters were used to estimate the elastic modulus in the rolling direction (RD) and transverse direction (TD) of the original sheet, and sheets after an above number of AB cycles. The deviation of the calculated and experimental values of the elastic modulus did not exceed 5%. The deviation of the calculated and experimental values of the ultimate tensile strength and yield stress in the RD and TD both in the initial state and after the corresponding number cycles of the AB did not exceed 10%.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kearns texture parameters, mechanical properties and damageability of titanium sheet after alternating bending

Usov

Shkatulyak

Savchuk

et al. 2021

Phys. Chem. Solid St.

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“…The description of the texture of a polycrystalline sample with a hexagonal structure using the Kearns parameters [6][7][8] in principle makes it possible to determine the physical and mechanical properties of the metal if the corresponding characteristics of a single crystal are known [9,10].…”

Section: Introductionmentioning

confidence: 99%

Single crystal characteristics of the Mg - 5% Li alloy, found from the polycrystalline experimental data and the Kearns texture parameters

Usov

Shkatulyak

Sovkova

et al. 2022

Phys. Chem. Solid St.

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This work aimed to experimentally determine of the Kearns texture parameters, elastic moduli, mechanical properties (ultimate tensile strength and yield strength) of sheets of an alloy of Mg 5 wt. % Li after various types of processing: 1) extrusion at 350 ° C through a rectangular die; 2) rolling with a change in its direction by 90° and intermediate annealing at 350°C after each pass; 3) after the subsequent alternating bending (AB) by 0.5; one; 3 and 5 cycles and evaluation of the elastic and mechanical properties of the corresponding single crystal of the alloy under study using the indicated data. The moduli of elasticity and strength characteristics of the studied polycrystalline samples were determined in the rolling direction (RD) and transverse direction (TD). Using the found parameters of the Kearns texture and the elastic and mechanical properties of the sheets, the values of the elastic modules and the ultimate strength and yield strength of the single crystal of the above alloy were estimated. The found modules of elasticity of a single crystal of an alloy Mg-5 wt. % Li deviate from their values found in previous studies by no more than 7.5%. Elastic modules and strength characteristics of the studied samples of magnesium alloy Mg 5 wt. % Li calculated from the single crystal data deviate from the experimental data by no more than 10%.

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“…The disadvantage of this method is the limited experimental points on the IPF, while there is no data on the estimation of the error in determining the LTEC and other physical properties, depending on the number of experimental points on the IPF. In [17], the accuracy of estimating the Kearns coefficients and Young's modulus from quantitative IPF was analyzed as a function of the discreteness of the experimental points for various variants of averaging properties on the IPF for HCP alloys, and in this work, such an analysis is implemented for LTEC as applied to Zr and its alloys.…”

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confidence: 99%

“…This approach can also be used to assess the accuracy of determining the characteristics of the LTEC anisotropy. In this case, as in [17,18], the pole density dependences for model textures can be represented as:…”

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confidence: 99%

Development of a method for calculating the LTEC anisotropy of Zr alloys

Betsofen

Speransky

Беспалов

et al. 2021

J. Phys.: Conf. Ser.

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The accuracy of determining the LTEC with respect to metals and alloys with an HCP lattice based on inverse pole figures (IPF) is analyzed depending on the number of experimental points on the IPF using three averaging options: (1) taking into account the irregular arrangement of reflections on the stereographic triangle according to Morris; (2) by the multiplicity factor and (3) with the same weight of each orientation. It is shown that when evaluating the LTEC for semi-finished products with a basal texture, 17 reflections on the IPF are sufficient to provide an error of <1% when using Morris averaging and the multiplicity factor; in the case of a prismatic texture, an error of <1% is provided by all three averaging options, while Morris averaging is minimal.

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Methodological aspects of the quantitative texture analysis of HCP Alloy (Ti, Zr) sheet semiproducts

Cited by 4 publications

References 11 publications

Kearns texture parameters, mechanical properties and damageability of titanium sheet after alternating bending

Kearns texture parameters, mechanical properties and damageability of titanium sheet after alternating bending

Single crystal characteristics of the Mg - 5% Li alloy, found from the polycrystalline experimental data and the Kearns texture parameters

Development of a method for calculating the LTEC anisotropy of Zr alloys

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