The Theory of the Properties of Metals and Alloys

P, Rohit Gangadhar

doi:10.1038/139348a0

Cited by 9 publications

(3 citation statements)

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“…Local dilation of the crystal lattice at the site of a line defect was hypothised to give rise to this phenomenon. Furthermore, the charge of this dipole has been described by Mott [54,55] as equal to 0.075(z-1), z is the ionic valence state of the matrix of ions. However, the contribution to the Lorentz force does not arise on account of equal +q and -q charge on the dipole.…”

Section: Discussionmentioning

confidence: 99%

“…If a dislocation is considered as having a charge, then the Cottrell-Hunter-Nabarro [53] electrical interaction of dislocation and a solute atom formalism can be invoked. The effective charge on a z valent ion in copper is about 0.075(z −1 ) unit electronic charge [54,55]. Considering pure iron rod and a dislocation to build up a charge (taking an average valence of 2.5 for Fe 2+ and Fe 3+ ), effective charge/dislocation = 0.1125 or 1.8 × 10 −20 C.…”

Section: Appendixmentioning

confidence: 99%

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Electropulsing-induced plastic deformation in an interstitial free steel

Raut

Fuloria

Baka

et al. 2022

Materials Science and Technology

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Direct observations on electropulsing (EP)-induced microstructural evolution, in interstitial free (IF) steel with different prior rolling reductions, brought out clear evidence of plastic deformation, changes in mesostructures and local mechanical properties. Although plastic strains and strain modes differed widely among the surface grains, these appeared orientation-dependent. In particular, the microstructural evolution was more pronounced when prior cold work was present and also along the transverse direction to the introduced EP. Finite element simulations showed a significant difference in locational and directional dependence of simulated magnetic flux density and stored magnetic energy. It appears that magnetic Lorentz force, providing torque to dislocation dipoles, acted as the mechanistic origin behind the microstructural changes.

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Section: Discussionmentioning

confidence: 99%

Section: Appendixmentioning

confidence: 99%

Electropulsing-induced plastic deformation in an interstitial free steel

Raut

Fuloria

Baka

et al. 2022

Materials Science and Technology

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“…61 The Cauchy's pressures C12−C44 can be calculated to analyze the nature of chemical bonding between atoms. 62 The positive values of F-based materials mean the nature of ionic bonds, while the negative values of Cl-based materials mean the nature of the covalent bond. This can be explained with the improved electronegativity of F than Cl, leading to the stronger electron transfer during bonding.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

First-Principles Calculations to Investigate Direct-Band Novel Cobalt-Based Double Perovskite Materials for Optoelectronic Applications

Tang

2022

Energy Fuels

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A series of novel cobalt-based perovskite materials have been studied through density functional theory first-principles calculation. The cubic perovskite structure stability is demonstrated by tolerance factors and Born−Huang stability criteria in mechanics as well as formation energies in thermodynamics. The elastic constant analysis indicates that the fluoride perovskites are ductile and ionic compounds while the chloride perovskites are brittle and covalent. All the perovskites are direct semiconductors with band gaps as 1.644, 0.455, 2.136, and 0.683 eV for K 2 InCoF 6 , K 2 InCoCl 6 , Rb 2 InCoF 6 , and Rb 2 InCoCl 6 , respectively. The absorption coefficient reveals all the materials still have broad absorption spectra compared with solar AM1.5 irradiance despite photon unavailability in the small wavelength range. Taking into account other physical properties, these perovskites still exhibit great potential and deserve further experimental research. Due to a proper band gap value and high light absorption, K 2 InCoF 6 is considered as the best candidate for solar materials.

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