Influence of preloading on formation of adiabatic localized shear in copper

Pushkov, V. A.; Yurlov, Alexey; Podurets, A. M.; Tsibikov, A. N.; Novikov, K.P.; Pukhov, M.A.

doi:10.1051/epjconf/20122602001

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…One such forced shear sample, termed the "top-hat" specimen was originated by Hartman, Kunze, and Meyer [41] and Meyer and Manwaring [12] and thereafter further developed by several investigators [23,25,56]. This sample design has seen wide application due to its compact geometry making it readily amenable to testing on quasi-static, intermediate strain-rate testing platforms, and using split-Hopkinson/Kolsky Pressure Bars [57,58]. In addition, the 'top-hat' sample design has been modeled using finite-element methods, where the modeling results have been shown to positively compare with experimental results [58,59].…”

Section: Introductionmentioning

confidence: 99%

“…This sample design has seen wide application due to its compact geometry making it readily amenable to testing on quasi-static, intermediate strain-rate testing platforms, and using split-Hopkinson/Kolsky Pressure Bars [57,58]. In addition, the 'top-hat' sample design has been modeled using finite-element methods, where the modeling results have been shown to positively compare with experimental results [58,59].…”

Section: Introductionmentioning

confidence: 99%

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Compact forced simple-shear sample for studying shear localization in materials

2016

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A new specimen geometry, the compact forced-simple-shear specimen (CFSS), has been developed as a means to achieve simple shear testing of materials over a range of temperatures and strain rates. The stress and strain state in the gage section is designed to produce essentially "pure" simple shear, mode II in-plane shear, in a compact-sample geometry. The 2-D plane of shear can be directly aligned along specified directional aspects of a material's microstructure of interest; i.e., systematic shear loading parallel, at 45 degrees, and orthogonal to anisotropic microstructural features in a material such as the pancake-shaped grains typical in many rolled structural metals, or to specified directions in fiber-reinforced composites. The shear-stress shear-strain response and the damage evolution parallel and orthogonal to the pancake grain morphology in 7039-Al are shown to vary significantly as a function of orientation to the microstructure.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compact forced simple-shear sample for studying shear localization in materials

2016

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“…Shear stress-shear displacement curves of various microstructures at (A) RT and (B) CT. Shear stress-nominal shear strain curves of various microstructures for the experiments conducted at (C) RT and (D) CT. (E) Uniform dynamic shear strain vs. dynamic shear YS for the present MEA, along with data for other metals and alloys. (F) Impact shear toughness vs. dynamic shear YS for the present MEA, along with data for other metals and alloys[64,[150][151][152][153][154][155][156][157][158] . MEA: Medium-entropy alloy; RT: room temperature; YS: yield stress; CT: cryogenic temperatures.…”

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A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Xu¹,

Wang²,

Li³

et al. 2022

Microstructures

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The CoCrFeMnNi alloy is one of the most notable first-generation high-entropy alloys and is also known as a Cantor alloy. This alloy was first proposed in 2004 and shows promising performance at cryogenic temperatures (CTs). Subsequent research has indicated that the equiatomic ternary CoCrNi medium-entropy alloy (MEA), as a subset of the Cantor alloy family, has better mechanical properties than the CoCrFeMnNi alloy. Interestingly, both the strength and ductility of the CoCrNi MEA are higher at CTs than at room temperature. CoCrNi-based alloys have attracted considerable attention in the metallic materials community and it is therefore important to generalize and summarize the latest progress in CoCrNi-based MEA research. The present review initially briefly introduces the discovery of the CoCrNi MEA. Subsequently, its tensile response and deformation mechanisms are summarized. In particular, the effects of parameters, such as critical resolved shear stress, stacking fault energy and short-range ordering, on the deformation behavior are discussed in detail. The methods for strengthening the CoCrNi MEA are then reviewed and divided into two categories, namely, modifying microstructures and adjusting chemical compositions. In addition, the mechanical performance of CoCrNi-based MEAs, including their dynamic shear properties, creep behavior and fracture toughness, is also deliberated. Finally, the development prospects of CoCrNi-based MEAs are proposed.

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Influence of preloading on formation of adiabatic localized shear in copper

Cited by 2 publications

References 13 publications

Compact forced simple-shear sample for studying shear localization in materials

Compact forced simple-shear sample for studying shear localization in materials

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

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