L Patriarca

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We develop an analytical expression for twin nucleation stress in bcc metal and alloys considering generalized planar fault energy and the dislocations bounding the twin nucleus. We minimize the total energy to predict the twinning stress relying only on parameters that are obtained through atomistic calculations, thus excluding the need for any empirical(More)
Although tumefactive multiple sclerosis is a well recognized variant of multiple sclerosis, prognostic uncertainty still exists about long term prognosis. The aim of this study was to estimate the occurrence and long term outcome of tumefactive demyelinating lesions (TDLs) in a cohort of multiple sclerosis patients. We reviewed brain MRI of 443 patients(More)
The Fe 3 Ga base alloy is known to exhibit pseudoelasticity and the solute hardened Fe 3 GaB holds considerable promise as well. The present work aims at developing a theoretical model to establish the critical twinning stress in Fe 3 Ga with varying boron concentration. The theoretical model is based on the atomisticemicromechanical approach where we(More)
We establish an overall energy expression to determine the twin migration stress in bcc metals. Twin migration succeeds twin nucleation often after a load drop, and a model to establish twin migration stress is of paramount importance. We compute the planar fault energy barriers and determine the elastic energies of twinning dislocations including the role(More)
a r t i c l e i n f o We present an experimental and theoretical study of slip nucleation in high entropy FeNiCoCrMn alloy which possesses superb mechanical properties. Uniaxial compression experiments were conducted on the ½591Š oriented single crystals. The single crystals permit evaluation of critical resolved shear stress (CRSS), and using Digital Image(More)
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