Single Crystal Magnesium Lithium Alloy Elastic Constants

Shkatulyak, N. M.; Usov, V. V.; Смирнова, С. В.

doi:10.14810/ijamse.2015.4401

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…It has been found that the averaged values of the elastic moduli of a single crystal of the Mg-5% Li (wt.) alloy have the value 𝐸 𝑐 = 56.5 GPa; 𝐸 𝑎 = 41.5 GPa and differ from those given in [20] by no more than 4.8% and 7.5%, respectively. The ultimate tensile strength and yield strength of a single crystal of the alloy Mg-5 % Li (wt.)…”

Section: Discussionmentioning

confidence: 56%

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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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Section: Discussionmentioning

confidence: 56%

“…Estimates of the elasticity modulus after the abovementioned types of processing using the found Kearns texture parameters and the elasticity constants of a single crystal of the Mg-5% Li (wt.) alloy, taken from [20], showed that the calculated and experimental values of the elasticity modulus of the alloy sheets differ by no more than 10%.…”

Section: Discussionmentioning

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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“…Changes in the values of crystalline domains sizes D, lattice distortion ε, dislocations density ρ, elastic modulus E, and damage parameters ω are mainly due to the crystallographic texture formed during thermomechanical processing and cycle's number of subsequent alternating bending of sheets. The corresponding regularities have been described by regression equations ( 14) -( 19), as well as (21)(22)(23)(24)(25)(26). екструзією, прокаткою після екструзії (в поєднанні з відпалом і зміною напрямку прокатки) і подальшого знакозмінного вигину (ЗІ) з числом циклів 0,5, 1, 3 і 5 на модуль пружності (E), параметр накопичення пошкоджень (параметр пошкоджуваності ω), кристалографічну текстуру і параметри субструктури бінарного сплаву Mg -5% Li (ваг.).…”

Section: Discussionunclassified

“…The elastic constants of the Mg-5%Li alloy were calculated by us earlier [23]. The results are shown in Table 1.…”

Section: Eejp 1 (2020)mentioning

confidence: 99%

Effect of Kind of Deformation on Young's Modulus, Damage Parameter, Texture and Structure of Alloy Mg – 5% Li (wt)

Usov

Brokmeier²,

Shkatulyak

et al. 2020

EEJP

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Effect of deformation by extrusion, rolling after extrusion (in combination with annealing and changing the rolling direction), and subsequent alternating bending (AB) with the number of cycles 0.5, 1, 3, and 5 on the elastic modulus (E), damage accumulation parameter (damage parameter ω), crystallographic texture, and substructure parameters of the binary Mg-5%Li alloy have been studied. The damage parameter (0 ≤ ω ≤ 1), which is interpreted as the relative reduction in the effective load-bearing cross-sectional area due to damage accumulation, was found by the change in the elastic modulus after various above types of deformation. At this, we used to compare equivalent deformation and equivalent elastic energy models. The substructure parameters (crystalline domains sizes D, lattice distortion ε, dislocation density ρ) were estimated by analyzing the physical broadening of the lines diffraction on the crystal lattice of studied alloy of the penetrating hard X-ray synchrotron radiation. It was found that in the studied alloy, sheet forms a texture, at which the hexagonal prism axis is 90° deviated from the normal direction (ND) to the sheet up to transverse direction (TD) after extrusion of the ingot at 350°C in combination with its further rolling in the direction of extrusion axis (rolling direction RD) to a thickness of 4.5 mm and annealing at 350°C after each pass. At this the crystallographic directions and coincide with RD. The texture, at which the hexagonal prism axis is deviated from ND to TD by angles ranging from 15 to 70° (unlike from texture of basal type of the pure magnesium) is formed after further rolling of studied alloy to a thickness of 1 mm with the changing of the RD on 90° in combination with annealing at 350°C after each pass. The crystallographic direction coincides with RD. The anisotropy of above mentioned characteristics was found. Correlation and regression analysis showed that the anisotropy and the values of E, D, ε, and ρ, are decreased, and the values of ω are increased with an increase of alternating bend cycles’ number. It is shown that changes in the above characteristics are mainly due to the crystallographic texture formed during thermomechanical processing and subsequent alternating bending of Mg-5%Li alloy sheets, which is confirmed by data of correlation and regression analysis.

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Single Crystal Magnesium Lithium Alloy Elastic Constants

Abstract: ABSTRACT

Cited by 2 publications

References 7 publications

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

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

Effect of Kind of Deformation on Young's Modulus, Damage Parameter, Texture and Structure of Alloy Mg – 5% Li (wt)

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