Elevated temperature deformation of Zr to large strains

Kassner, M.E.; Pérez‐Prado, M.T.; Hayes, Troy A.; Jiang, Liangliang; Barrabes, S.R.; Lee, I. F.

doi:10.1007/s10853-012-7060-4

Cited by 20 publications

(14 citation statements)

References 55 publications

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“…Plastic creep of polycrystals is described macroscopically by the constitutive equation (the relation between steadystate strain rate and stress) of a nonlinearly viscous solid, the microstructural basis of which is usually related to the glide and climb process of dislocations [30]. Since the void growth law described by Eq.…”

Section: Void Growth Due To Viscous Dislocation Motionmentioning

confidence: 99%

Void growth in copper during high-temperature power-law creep

et al. 2011

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Section: Void Growth Due To Viscous Dislocation Motionmentioning

confidence: 99%

Void growth in copper during high-temperature power-law creep

et al. 2011

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“…Prior attempts to refine the grain structure in Zr via SPD either led to submicron grains with grain diameters >100 nm [23,24,39,40] or a fraction of nanograins of Zr with an alternate crystal structure (omegaZr, beta-Zr or fcc Zr) [23][24][25]41]. With single-phase commercial purity Zr, the final grain size reached with the ARB technique was 400 nm [42]. Bimetallic composites with hcp constituents such as Mg-Al [18], Ti-Al [20], CuZn [16], Cu-Zr [17], Zr-Nb [40], and Al-Zn [15] have been synthesized using ARB.…”

Section: Introductionmentioning

confidence: 99%

Bulk texture evolution of nanolamellar Zr–Nb composites processed via accumulative roll bonding

et al. 2015

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It was recently demonstrated that bulk two-phase 50/50 Zr-Nb nanolayered composites with 90 nm individual layers can be fabricated from an initial coarse-layered composite with 1 mm layers via the severe plastic deformation process of accumulative roll bonding. During the deformation, the Zr phase retained its hcp crystal structure and the Zr-Nb interface remained sharp. Here we use a combination of neutron diffraction and dislocation-based polycrystal plasticity constitutive modeling to assess the evolution of texture and deformation mechanisms over a four order-ofmagnitude range in layer thickness. The phase textures in the nanocomposite strongly deviate from that of Zr or Nb rolled in monolithic form, becoming highly peaked and intense. The model suggests that texture development in the Nb phase is associated with multiple slip and contributions from both {1 1 2}h1 1 0i slip and {1 1 0}h1 1 0i slip. In the Zr phase the model suggests that the texture develops due to a predominance of prismatic hai and basal hai slip.

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“…Unlike crystalline metals, for which the creep behavior has been extensively studied and several well documented deformation mechanisms, e.g., dislocation and grain boundary related processes [1,2], have been developed, the creep behavior in metallic glass (MG) received much less attention [3e5], especially when the deformed volume is in nanoscale [6,7]. In principle, due to the lack of long range structural order, the mechanisms mediated via dislocation or grain boundary are not operative in MG [3,8,9].…”

Section: Introductionmentioning

confidence: 99%