Effect of a defect structure on the static and long-term strength of submicrocrystalline VT1-0 titanium fabricated by plastic deformation during screw and lengthwise rolling

Бетехтин, В. И.; Kolobov, Yu. R.; Sklenička, V.; Кадомцев, А. Г.; Narykova, M. V.; Dvořák, Jiří; Голосов, Е. В.; Kardashev, B. K.; Kuzmenko, Igor

doi:10.1134/s1063784215010041

Cited by 22 publications

(17 citation statements)

References 7 publications

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“…Unique features of the metal flow and the stress-strain state (SSS) during RSR change billet metal properties and the grain structure. The intensive shear strain created by three-roll RSR mini-mills significantly decreases the grain size of different materials such as steels [7], titanium alloys [8,9,10,11], magnesium and its alloys [4,5,6], copper and copper alloys [12,13,14], aluminum alloys [15]. The fine-grain structure increases the range of round bar properties [2]; above all, plasticity and associated properties [5,8].…”

Section: Introductionmentioning

confidence: 99%

Forming Features and Properties of Titanium Alloy Billets After Radial-Shear Rolling

Skripalenko

Галкин

Karpov³

et al. 2019

Materials

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Radial-shear rolling (RSR) of titanium alloy billets was realized in a three-high rolling mill. Experimental rolling was simulated using DEFORM software. The purpose was to reveal how stress-strain state parameters, grain structure and hardness vary along the billet’s radius in the stationary stage of the RSR process. It was also the goal to establish a relation between stress state parameters, hardness and grain structure. Changes in the accumulated strain and the stress triaxiality were established by computer simulation. Hardness and grain size changes were obtained after experimental rolling. The novelty aspect is that both computer simulation and experimental rolling showed that there is a ring-shape area with lowered strength in the billet’s cross-section. The radius of the ring-shape area was predicted as a result of the research.

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Section: Introductionmentioning

confidence: 99%

Forming Features and Properties of Titanium Alloy Billets After Radial-Shear Rolling

Skripalenko

Галкин

Karpov³

et al. 2019

Materials

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“…The first one was prepared from a bar with a diameter of 30 mm. The bar was deformed by one step of helical rolling, one step of lengthwise rolling (both at 673 K), and, finally, again by helical rolling at ambient temperature to reach a final diameter of about 8 mm [ 19 , 20 ]. Thus, the deformed material corresponds to the imposed strain of about 1.5.…”

Section: Methodsmentioning

confidence: 99%

Influence of Cryo-Processing and Post-SPD Annealing on Creep Behavior of CP Titanium

et al. 2022

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The commercial purity of VT1-0 titanium was processed by the rolling process and executed at elevated, room, and cryo-temperatures. These processings led to the formation of an ultrafine-grained microstructure, with the mean grain size at a nanometer level. Some of these materials were statically annealed at a temperature of 823 K for 1 h, which led to significant subgrains and grain coarsening. The constant load creep tests in tension were carried out in argon on all states of materials, at temperatures of 648–723 K and different ranges of applied stresses. From the value of the steady-state creep rate, the control creep mechanisms were determined. The microstructure analyses were carried out via SEM and TEM. It was found that titanium prepared at elevated and room temperatures have a higher creep strength than titanium prepared at cryo-temperatures. Furthermore, the post-SPD —annealing led to a significant decrease in the creep properties. The influence of the preparation temperature on the difference of the creep behavior were discussed and explained using the microstructure analyses of the tests’ samples.

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“…However, after SPD treatment, a decrease in durability of the SMC materials under sustained loading is often observed. In the works of V. I. Betekhtin and coauthors [3,4] it is shown that this effect may be due to the presence of initial cavities in the SMC materials. In the works of Yu.…”

Section: Introductionmentioning

confidence: 99%

The investigation of the evolution of diffusional properties of nonequilibrium grain boundaries during annealing of submicrocrystalline materials

Перевезенцев¹,

Pupynin²,

Ogorodnikov³

2019

LOM

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Effect of a defect structure on the static and long-term strength of submicrocrystalline VT1-0 titanium fabricated by plastic deformation during screw and lengthwise rolling

Cited by 22 publications

References 7 publications

Forming Features and Properties of Titanium Alloy Billets After Radial-Shear Rolling

Forming Features and Properties of Titanium Alloy Billets After Radial-Shear Rolling

Influence of Cryo-Processing and Post-SPD Annealing on Creep Behavior of CP Titanium

The investigation of the evolution of diffusional properties of nonequilibrium grain boundaries during annealing of submicrocrystalline materials

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