Structure Factors That Influence the Stability of Plastic Strain of BCC Metals under Tensile Load

Malygin, G. A.

doi:10.1134/1.1924852

Cited by 26 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apparently, the mechanisms of self-organization and formation of dislocation ensembles were considered most consistent and rigorously in [73][74][75][76]. Thus, in [74] the relationship between the strength and plasticity was analyzed on the examples of work hardening curves for some metals and alloys with the Face Centered Cube (FCC) lattice.…”

Section: On the Application Of The Autowave Representationsmentioning

confidence: 99%

“…The influence of the Peierls stress on the strength and strain before the neck formation was studied in [75] for metals and alloys in tension. The analysis was based on the equation of dynamics of dislocation density with strain determining the character of work hardening of the material and the influence of the Peierls stress on the parameters of this equation in terms of the annihilation coefficient of screw dislocations.…”

Section: On the Application Of The Autowave Representationsmentioning

confidence: 99%

See 1 more Smart Citation

Autowave Physics of Material Plasticity

Зуев

Баранникова

2019

Crystals

View full text Add to dashboard Cite

The notions of plastic flow localization are outlined in the paper. It is shown that each type of localized plasticity pattern corresponds to a definite stage of deformation hardening. In the course of plastic flow development, a changeover in the types of localization patterns occurs. The types of localization patterns are limited in number: four pattern types are all that can be expected. A correspondence was set up between the emergent localization pattern and the respective flow stage. It is found that the localization patterns are manifestations of the autowave nature of plastic flow localization process, with each pattern type corresponding to a definite mode of autowave. In the course of plastic flow development, the following modes of autowaves will form in the following sequence: switching autowave → phase autowave → stationary dissipative structure → collapse of the autowave. Of particular interest are the phase autowave and the respective pattern observed. Propagation velocity, dispersion, and grain size dependence of wavelength were determined experimentally for the phase autowave. An elastic-plastic strain invariant was also introduced to relate the elastic and plastic properties of the deforming medium. It is found that the autowave characteristics follow directly from this invariant.

show abstract

Section: On the Application Of The Autowave Representationsmentioning

confidence: 99%

Section: On the Application Of The Autowave Representationsmentioning

confidence: 99%

Autowave Physics of Material Plasticity

Зуев

Баранникова

2019

Crystals

View full text Add to dashboard Cite

show abstract

“…The first term in the right-hand part of equation ( 9) is the dislocation source that is written from the energy-wise consideration; 0.1 η = is the portion of dissipated power, which is spent on the generation of new defects. The second term in the right-hand part of equation ( 9) describes annihilation and is written similar to [54]. For nanocrystalline materials, one has to take into account the runoff dislocations on grain boundaries, which is described by the last term in the right-hand part of equation (9).…”

Section: Dislocations Slipmentioning

confidence: 99%

Theoretical interpretation of abnormal ultrafine-grained material deformation dynamics

Mayer

2016

Modelling Simul. Mater. Sci. Eng.

View full text Add to dashboard Cite

Some recent experiments with ultrafine-grained metal samples reveal that it has an abnormal mechanical response on the intensive dynamical loading caused by its impact or electron beam irradiations. On the basis of the original plasticity model, which takes into account dislocation slip and grain boundary sliding, we show that this response is usual for such structure. Moreover, our calculations predict an inverse Hall–Petch relation for ultrafine grained metals at extremely high strain rates (above 107 s−1), while the classical low strain rate experiments and molecular dynamic simulations detects such inverse Hall–Petch relation only for nanocrystalline materials. The main outcomes of present work are the described plasticity model and the conclusions that the ultrafine-grained metals (with grains of about 100–200 nm in diameter) has to have maximal dynamic shear strength and it is the most persistent to dynamic spall fracture because of maximal energy dissipation in it.

show abstract

Influence of Loading Direction on the Mechanical Parameters of Pre-formed Materials in Tensile Test

Norz,

Volk

2022

The Minerals, Metals &Amp; Materials Series

View full text Add to dashboard Cite

Structure Factors That Influence the Stability of Plastic Strain of BCC Metals under Tensile Load

Cited by 26 publications

References 9 publications

Autowave Physics of Material Plasticity

Autowave Physics of Material Plasticity

Theoretical interpretation of abnormal ultrafine-grained material deformation dynamics

Influence of Loading Direction on the Mechanical Parameters of Pre-formed Materials in Tensile Test

Contact Info

Product

Resources

About