Linking properties of the amorphous phase to response of driven metals

TYPECondensed Matter Seminar
Speaker:Yinon Ashkenazy
Affiliation:Racah Institute of Physics, Hebrew University of Jerusalem
Location:Lidow Nathan Rosen (300)
Abstract:I will demonstrate the strong relation between response of the amorphous phase of a metal to its response to external load with and without irradiation. This will be shown to have a determinatal role in a variety of scenarios; from spall due to external shock [1], to crystallization velocities in deeply undercooled metals [2], to creep (both with and without irradiation) [3,4,5].

The focus of the presentation would be a description of a new creep mechanism controlled by response of amorphous like grain boundaries[3]. I will then try and indicate how this new understanding can lead to develocpment of improved radiation resistant materials and alternatively, how it can facilitate understanding of currently proposed nano-structured materials such as oxide dispersion strengthened steels

1App. Phys. Lett. 86 (2005) 51907, 2 acta mat 58 (2010) 524; Phys Rev Lett 102 (2009), 3 Nano Letters., 12 (2012) 4084, 4, J. Mat. Res., 27 (2012) 1621