A long-standing controversy exists between molecular dynamics simulations and experiments on the twinning propensity of nanocrystalline (NC) face-centered-cubic metals. For example, three-dimensional molecular dynamics simulations rarely observed twins in NC Ni, whereas experiments readily observed them. Here this discrepancy is resolved by experimental observation of an inverse grain-size effe...

ABSTRACT: Frequent occurrence of seismic activities has drawn attention of various researchers, cutting across science and engineering discipline. The domain of earthquake geotechnical engineering has extended from determination of attenuation of seismic wave to providing suitable foundation under liquefied and unliquefied soil conditions. The seismic data can be fully intrepreated by use of se...

Abstract Solute accumulation/depletion in the liquid around a growing solid particle during solidification of metallic melts creates constitutionally supercooled (CS) zone that has significant effect on final solidified grain structure. In this paper, we introduce two mechanisms related to CS affect size: one is initiation free (GIFZ) describes inability nucleant particles located for and other...