The Influence of Ultrafine-Grained State of Zr – 1 wt.% Nb and Ti – 45 wt.% Nb Alloys on their Thermophysical Properties and Energy Dissipation and Accumulation during Deformation

Легостаева, Е. В.; Sharkeev, Yu. P.; Belyavskaya, O. A.; Вавилов, В. П.; Skripnyak, Vladimir A.; Zhilyakov, A. Yu.; Kuznetsov, V. P.; Eroshenko, A. Yu.

doi:10.1007/s11182-021-02270-0

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…It is worth noting that the formation of the α-phase during rotary forging, which has a higher modulus of elasticity than the β- Figure 8c illustrates a characteristic bottom-up dependency of thermal conductivity with increasing heating temperature. A similar trend in thermal conductivity with temperature was observed in the biocompatible β-alloy Ti-45Nb with an ultrafine grain structure in [52]. In this study, the rate of increase, i.e., the slope angle of the conductivity vs. temperature curve, decreases above 450 • C. We attribute this effect to the realization of reverse α+β→β-transformation.…”

Section: Resultssupporting

confidence: 84%

Microstructure and Physico-Mechanical Properties of Biocompatible Titanium Alloy Ti-39Nb-7Zr after Rotary Forging

Illarionov,

Mukanov,

Stepanov

et al. 2024

Metals

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The evolution of microstructure, phase composition and physico-mechanical properties of the biocompatible Ti-39Nb-7Zr alloy (wt.%) after severe plastic deformation by rotary forging (RF) was studied using various methods including light optical microscopy, scanning and transmission electron microscopies, X-ray diffraction, microindentation, tensile testing and investigation of thermophysical properties during continuous heating. The hot-rolled Ti-39Nb-7Zr with initial single β-phase structure is subjected to multi-pass RF at 450 °C with an accumulated degree of true deformation of 1.2, resulting in the formation of a fibrous β-grain structure with imperfect 500 nm subgrains characterized by an increased dislocation density. Additionally, nano-sized α-precipitates formed in the body and along the β-grain boundaries. These structural changes resulted in an increase in microhardness from 215 HV to 280 HV and contact modulus of elasticity from 70 GPa to 76 GPa. The combination of strength and ductility of Ti-39Nb-7Zr after RF approaches that of the widely used Ti-6Al-4V ELI alloy in medicine, however, Ti-39Nb-7Zr does not contain elements with limited biocompatibility and has a modulus of elasticity 1.5 times lower than Ti-6Al-4V ELI. The temperature dependences of physical properties (elastic modulus, heat capacity, thermal diffusivity) of the Ti-39Nb-7Zr alloy after RF are considered and sufficient thermal stability of the alloy up to 450 °C is demonstrated.

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Section: Resultssupporting

confidence: 84%

Microstructure and Physico-Mechanical Properties of Biocompatible Titanium Alloy Ti-39Nb-7Zr after Rotary Forging

Illarionov,

Mukanov,

Stepanov

et al. 2024

Metals

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“…This unique material was provided by the Laboratory of Physics of Nanostructured Biocomposites of the Institute of Strength Physics and Materials Science of the Siberian Branch of Russian Academy of Sciences. The method of obtaining, mechanical testing, as well as structural studies of this material are presented in detail in the works [45][46][47][48][49].…”

Section: Methodsmentioning

confidence: 99%

Behavior of Zr–1Nb alloy in coarse- and ultrafine-grain states under laser-induced shock wave loading

Ledon,

Balakhnin,

Uvarov

et al. 2023

Frattura Ed Integrità Strutturale

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The work is devoted to the study of the Zr-1Nb alloy in coarse-grained and ultrafine-grained states under laser-induced shock-wave loading. This material is of interest due to the application for the manufacture of shells for fuel elements of nuclear reactors. The properties of this alloy in the ultrafine-grained state is attracted for the reliability improvement of fuel rods in wide range of load intensity. Shock wave loading was carried out using a Beamtech SGR-Extra-10 high-energy nanosecond laser. The free surface velocity profiles were registered by the VISAR system. Mechanical characteristics are obtained using velocity profiles. It is shown that the spall strength and dynamic elastic limit for the coarse-grained state are higher than for the ultrafine-grained state. In general, the Zr-1Nb alloy in the ultrafine-grained state is more susceptible to spall fracture, including laser shock peening. Numerical simulation of the process under study has been carried out using statistically based nonlinear model of solid with defects and finite element method to describe the deformation behavior and fracture of the material under shock-wave loading. Simulation results are qualitatively consistent with experiments in the prediction of the conditions of spall failure.

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Influence of Thermal Treatment of Ti–45Nb Alloy in Ultrafine-Grained State on Its Structural Parameters and Heat Capacity

et al. 2022

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The Influence of Ultrafine-Grained State of Zr – 1 wt.% Nb and Ti – 45 wt.% Nb Alloys on their Thermophysical Properties and Energy Dissipation and Accumulation during Deformation

Cited by 5 publications

References 17 publications

Microstructure and Physico-Mechanical Properties of Biocompatible Titanium Alloy Ti-39Nb-7Zr after Rotary Forging

Microstructure and Physico-Mechanical Properties of Biocompatible Titanium Alloy Ti-39Nb-7Zr after Rotary Forging

Behavior of Zr–1Nb alloy in coarse- and ultrafine-grain states under laser-induced shock wave loading

Influence of Thermal Treatment of Ti–45Nb Alloy in Ultrafine-Grained State on Its Structural Parameters and Heat Capacity

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