Twin structures in copper after shock and Shockless high-rate loading

Podurets, A. M.; Raevskii, V. A.; Khanzhin, V. G.; Lebedev, A. I.; Aprelkov, O. N.; Igonin, V. V.; Kondrokhina, I. N.; Баландина, А. Н.; Tkachenko, M. I.; Petit, J.; Zocher, M. A.

doi:10.1134/s0010508211050157

Cited by 11 publications

(6 citation statements)

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Section: Materials and Procedures Of Studiesmentioning

confidence: 98%

“…As depicted in [11] such twins are formed in copper by pressure of higher than 20 GPa at dynamic loading and with a strain rate of more than 10 6 s −1 . The formation of a great deal of twins increases strength characteristics of materials [11]. The similar data, but with This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.…”

Section: Materials and Procedures Of Studiesmentioning

confidence: 98%

“…The similar data, but with This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. the appearance of intragranular parallel bands of localized strain, were revealed for copper after shock-wave loading by pressure of 30 GPa [11]. Dynamic compression diagrams for these two types of copper at strain rates of 2100-2500 s −1 were constructed in true coordinates of σ i -ε I and they are presented in figure 2.…”

Section: Materials and Procedures Of Studiesmentioning

confidence: 99%

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Influence of preloading on formation of adiabatic localized shear in copper

Pushkov¹,

Yurlov²,

Podurets³

et al. 2012

EPJ Web of Conferences

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Abstract. This paper is devoted to results of investigation of localized shear in as-received copper, and which was subjected to preliminary quasi-isentropic shock loading by the pressure of ∼ 30 GPa. Tests were performed with hat-shaped samples by the Split Hopkinson Pressure Bar method (SHPB). The authors present estimation of quantitative characteristics of localized shear in tested materials (shear stress, relative shear strain, shear band width, relative strain rate in shear band). The paper includes data of metallographic investigations of the tested samples. Also the authors made an attempt of numerical simulation of stress field change during formation.

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Section: Materials and Procedures Of Studiesmentioning

confidence: 98%

Section: Materials and Procedures Of Studiesmentioning

confidence: 98%

Section: Materials and Procedures Of Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Influence of preloading on formation of adiabatic localized shear in copper

Pushkov¹,

Yurlov²,

Podurets³

et al. 2012

EPJ Web of Conferences

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“…Podurets et al [172] reported that the deformation twins in copper were grouped into packets with widths of 2 to 15μm when certain threshold values of pressure (20GPa) and strain rate (>10 6 s -1 ) were exceeded. Below these thresholds, the deformation twins were more…”

Section: Precipitation Phase Transformation and Mechanical Twinningmentioning

confidence: 99%

“…Li et al [171] observed pin-like deformation twins in the microstructure of TWIP steel after high strain rate deformations. Podurets et al [172] reported that the deformation twins in copper were grouped into packets with widths of 2 to 15μm when certain threshold values of pressure (20GPa) and strain rate (>10 6 s -1 ) were exceeded. Below these thresholds, the deformation twins were more uniformly distributed in the matrix.…”

Section: Constitutive Models For Titanium Alloysmentioning

confidence: 99%

The dynamic response of β titanium alloys to high strain rates at room and elevated temperatures

Zhan¹

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Titanium and its alloys fulfil a wide range of applications involving aerospace, biomedical, chemical and petroleum industries due to their extraordinary properties such as high specific strength, excellent biocompatibility and corrosion resistance. Among different types of titanium alloys, β titanium alloys have a unique range of properties such as an excellent combination of high strength and fracture toughness and low Young's modulus. Therefore, the usage of β titanium alloys in the manufacturing of some key components in aerospace and biomedical industries has continually increased in the past decade.Nowadays many commercial manufacturing processes for metallic materials such as machining, explosive welding, hot forging and extrusion employ high strain rates and are conducted at elevated temperatures. Also, high-strain-rate deformation can be encountered in collisions such as in car crashes, bird strikes on airplanes and micrometeorite impacts on space structures. Hence a large number of studies have been conducted on the dynamic response of metallic materials including copper, steels, tantalum, Ti-6Al-4V alloy and commercially pure titanium to high strain rates. Due to limited knowledge of the dynamic behaviour of β titanium alloys, this thesis mainly investigates the stress-strain behaviour and microstructural evolution of β titanium alloys under high strain rates at room and elevated temperatures.Split Hopkinson Pressure Bar compressive tests were carried out on two new types of β titanium alloys with different levels of β phase stability, the Ti-6Cr-5Mo-5V-4Al (wt. %) and Ti-25Nb-3Zr-3Mo-2Sn (wt.%) alloys, at strain rates ranging from 10 -3 s -1 to 10 4 s -1 and temperatures ranging from 293K to 1173K. The Ti-6Cr-5Mo-5V-4Al alloy, with relatively high β phase stability, represents an alloy type which can be engineered through heat treatment or thermo-mechanical processing to achieve a superior combination of strength and fracture toughness. While the Ti-25Nb-3Zr-3Mo-2Sn alloy with relatively low β phase stability represents an alloy type which can be applied in biomedical applications due to their low Young's modulus and superelastic properties.For the Ti-6Cr-5Mo-5V-4Al alloy, dislocation slip is dominant at all testing strain rates and temperatures in this research. The flow stress increases with increasing strain rate but decreasing temperature. Also, it is more sensitive to temperature than strain rate. At ambient temperatures, the strain hardening rate exhibited by the Ti-6Cr-5Mo-5V-4Al alloy at high strain rates is much lower than that at quasi-static strain rates, which is attributed to the thermal softening effect brought byHongyi Zhan II The University of Queensland adiabatic heating. While for the Ti-25Nb-3Zr-3Mo-2Sn alloy, multiple deformation mechanisms including dislocation slip, {332} <113> and {112} <111> mechanical twinning, stress-induced martensitic α" and ω phase transformations can be activated simultaneously and among them {332} <113> twinning is dominant at 293K regardless of...

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