Publications de Shankha Nag | EPFL Graph Search

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Statistical analyses of the first pop-in stress data, obtained by spherical tip-nanoindentation experiments on different metallic glasses (MGs) with tip radius, R-i, loading rate, (P) over dot, and structural state of the glass as experimental variables, s ...

Dislocation motion through a random alloy is impeded by its interactions with the compositional fluctuations intrinsic to the alloy, leading to strengthening. A recent theory predicts the strengthening as a function of the solute-dislocation interaction en ...

Under common processing conditions, both dilute and complex concentrated alloys are often realized as random alloys, with no correlation in the occupancy of lattice sites by the constituent atom types. The current thesis primary addresses two problems in r ...

The yield strength of random metal alloys, i.e. alloys with random occupation of the crystalline lattice sites by the elemental constituent atoms all considered as solutes, is primarily understood as controlled by solute/dislocation interactions. Solute-so ...

AuNi is a classic long-studied fcc alloy combining a very "large"atom (Au) and a very "small"atom (Ni), and the large atomic size misfits suggest very high strengthening. Here, AuNi is used as a model alloy for the testing of new strengthening theories in ...

Random alloys are multicomponent systems where the atomic type on each lattice site is independent of the atom types on any other lattice site. The fluctuations in local atomic configurations inherent to the random alloy prevents the accurate application o ...

Recent surging interest in strengthening of High Entropy Alloys (HEAs) with possible chemical ordering motivates the development of new theory. Here, an existing theory for random alloys that accounts for solute-dislocation and solute–solute interactions i ...

Shankha Nag

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Statistical nature of the incipient plasticity in amorphous alloys

Solute-strengthening in elastically anisotropic fcc alloys

Concurrent multiscale modeling and theory of solute-strengthening for dilute and complex concentrated alloys

Effect of solute-solute interactions on strengthening of random alloys from dilute to high entropy alloys

Solute misfit and solute interaction effects on strengthening: A case study in AuNi

Atomistic-continuum coupling of random alloys

Effect of Solute-Solute Interactions on Strengthening of Random Alloys from Dilute to High Entropy Alloys (vol 200, pg 659, 2020)

Solute-strengthening in metal alloys with short-range order