Predicting ductility in quaternary B2 -like alloys

Abstract

Although intermetallics with a B2-type crystal structure are typically brittle, a class of B2 intermetallics that demonstrates unusually high ductility has been reported. A set of recently developed B2-like quaternary precious metal-rare earth alloys also includes compositions with significant ductility. To predict ductility in these systems, we have adapted a computational energy-based metric based on slip systems and relative stability of planar defects, developed to predict ductility in B2 binary systems, for use with quaternary B2-like alloys. The computational metric successfully predicts the experimentally-determined ductility or brittleness of 15 B2-like quaternary precious metal-rare earth and refractory alloys.

Mechanical Characterization of Anhydrous Microporous Aluminophosphate Materials: Tridimensional Incompressibility, Ductility, Isotropy and Negative Linear Compressibility

“…CP is also related with the brittle/ductile character of crystals [198,[200][201][202][203][204]. Large values of CP are associated with highly ductile materials.…”

“…Knowledge of the full elastic tensor is fundamental for assessing the mechanical stability of a given material or structure [189][190][191][192]. In materials science and technology, mechanical engineering, the phar-maceutical industry, and many other branches of science , the knowledge of the anisotropic mechanical properties, including the Young and shear moduli, Poisson's ratio, and elastic anisotropy measures, is fundamental for the assessment of many important properties of materials, composites and products as their hardness [193][194][195][196][197] ductility [198][199][200][201][202][203][204], anisotropy [205][206][207][208][209][210][211][212] shear strength [74,82,[215][216][217][225][226][227] compaction, tableting and milling performance [88,217,218,221,222,227,234,235], durability and degradability [207,208,238,239], and for the ma...…”