Modeling the texture evolution of Cu/Nb layered composites during rolling

The Suppression of Instabilities via Biphase Interfaces During Bulk Fabrication of Nanograined Zr

“…The plastic deformation behavior of similar single-phase Zr has been well studied, and it has been found that it deforms primarily by slip with only a modest amount of twinning at room temperature [44][45][46] and by an interplay of slip and twinning at 77 K. [37,46,47] Nb similar to that used here has been found to deform by slip, activating both {110} 111 and {112} 111 slip at room temperature in rolling and uniaxial testing. [38,48] The ARB process (see supplement for more detail concerning this process) consists of a repetitive sequence of cutting, cleaning, stacking, and roll bonding sheets with the initial step in our current process consisting of sandwiching a 2 mm Nb sheet between two 1 mm Zr sheets. Using this cladding technique, new Nb-Zr interfaces are only formed during the first rolling pass.…”

Layer Stability and Material Properties of Friction-Stir Welded Cu–Nb Nanolamellar Composite Plates

“…Friction-stir weld (FSW), a solid-state joining process, is explored as a possible joining process for maintaining high ρ and hence the strength of the material within the weld region. Simulations show that the stability of ω, observed in previous studies, [7,11,12] is derived from the ability of specific interfacial structures to accommodate the plastic deformation of the ARB process. Since the FSW process will introduce additional severe plastic deformation in a manner that differs considerably from that used to synthesize the initial composite, the stability of the preexisting ω is uncertain.…”

Understanding dislocation mechanics at the mesoscale using phase field dislocation dynamics

“…Once the appropriate slip modes are assigned, this modification naturally carries through in the strain energy (equation (2.3)). The slip modes most often studied and used in larger-scale crystal plasticity codes for bcc materials are the {110} and {112} slip modes [63,64]. In a similar fashion, the results presented here will focus on the {110} 111 slip mode.…”