What is “stationary” deformation of pure Cu?

Blum, W.; Dvořák, Jiří; Král, Pétr; Eisenlohr, Philip; Sklenička, V.

doi:10.1007/s10853-013-7983-4

Cited by 14 publications

(9 citation statements)

References 47 publications

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“…It was found that the creep resistance of the CG and ECAP states is influenced by the type of creep testing. 44) The results demonstrate that UFG Cu tested in tension under constant load exhibits a longer creep live and approximately a similar minimum creep rate as in CG Cu as shown in Fig. 9.…”

Section: Influence Of Testing Modessupporting

confidence: 57%

The Characteristics of Creep in Metallic Materials Processed by Severe Plastic Deformation

et al. 2019

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Processing through the application of severe plastic deformation (SPD), as in equal-channel angular pressing (ECAP), provides an opportunity for achieving exceptional grain refinement to the submicrometer or even the nanometer level. After SPD processing, these materials may be conveniently used for evaluating the effect of a reduced grain size on the creep behaviour at elevated temperatures under testing conditions of constant load or constant stress. This report provides an overview of the creep properties of ECAP-processed metals with an emphasis on the microstructural characteristics developed by SPD, on their thermal stability and especially on the creep mechanisms that control their flow behaviour. For convenience, these properties are generally compared with the creep behaviour of coarse-grained (CG) samples of the same materials tested under identical conditions.

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Section: Influence Of Testing Modessupporting

confidence: 57%

The Characteristics of Creep in Metallic Materials Processed by Severe Plastic Deformation

et al. 2019

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“…is usually called steady state, stationary state or saturation stage (of flow stress) in the literature. We prefer the term quasi-stationary (qs) state [1], because slow changes of microstructure parameters (boundaries [2,3], particles, . .…”

Section: Introductionmentioning

confidence: 99%

Quasi-Stationary Strength of ECAP-Processed Cu-Zr at 0.5 Tm

Blum

Dvořák

Král

et al. 2019

Metals

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The influence of the grain structure on the tensile deformation strength is studied for precipitation-strengthened Cu-0.2%Zr at 673 K . Subgrains and grains are formed by equal channel angular pressing (ECAP) and annealing. The fraction of high-angle boundaries increases with prestrain. Subgrains and grains coarsen during deformation. This leads to softening in the quasi-stationary state. The initial quasi-stationary state of severely predeformed, ultrafine-grained material exhibits relatively high rate-sensitivity at relatively high stresses. This is interpreted as a result of the stress dependences of the quasi-stationary subgrain size and the volume fraction of subgrain-free grains.

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“…The possible mechanisms may be attributed to the recovery of dislocation induced by EPT, which played a crucial role in strengthening the material. [ 34 ] As reported in a previous paper, the decrease of mobile dislocation density leads to an increment in strength and a reduction in ductility when the soften effect induced by grain growth could be ignored. [ 26 ] The TEM image in Figure 7a indicates that the mobile dislocation density of RT‐EPT‐6 sample is lower than that of LN‐EPT‐6 sample in Figure 7b.…”

Section: Discussionmentioning

confidence: 85%

Regulating the Tensile Properties of a Nano‐Lamellar Austenitic Stainless Steel via Cryogenic Electropulsing

et al. 2022

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Electropulsing treatment (EPT) in the liquid nitrogen (LN) circumstances, referred to as LN‐EPT, is utilized to regulate the microstructure and tensile properties of a cold‐rolled 316L austenitic stainless steel. The electropulsing effects between the samples treated in the ambient environment at room temperature (RT) and in the LN temperature are compared. The results confirm that the LN‐EPT‐processed samples can also realize a fully recrystallized microstructure, and even the Joule heat is significantly suppressed compared with the RT‐EPT samples. The tensile properties of the LN‐EPT samples show both higher yield strength and higher ultimate strength while keeping considerable elongations compared with the RT‐EPT samples because of the finer recrystallized structure in the LN‐EPT samples. This attempt of LN‐EPT may shed some new light on developing the cryogenic electropulsing‐assisted forming methods for metals in the future.

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What is “stationary” deformation of pure Cu?

Cited by 14 publications

References 47 publications

The Characteristics of Creep in Metallic Materials Processed by Severe Plastic Deformation

The Characteristics of Creep in Metallic Materials Processed by Severe Plastic Deformation

Quasi-Stationary Strength of ECAP-Processed Cu-Zr at 0.5 Tm

Regulating the Tensile Properties of a Nano‐Lamellar Austenitic Stainless Steel via Cryogenic Electropulsing

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