Journal
MATERIALS LETTERS
Volume 107, Issue -, Pages 134-137Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2013.05.142
Keywords
Nanocrystalline materials; Surface circulation rolling treatment (SCRT); Mechanical properties; Fracture behavior; Zirconium (Zr)
Funding
- National Basic Research Program of China [2010CB731606]
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The tensile properties and fracture behavior of gradient nano-grained/coarse-grained zirconium produced by surface circulation rolling treatment were investigated. Experimental results indicated that gradient nano-grained zirconium foil exhibits high yield strength (similar to 748 MPa) and reduced tensile elongation (similar to 3.0%) relative to its coarse-grained counterpart. On the contrary, the gradient nano-grained/coarse-grained zirconium shows good mechanical properties which combine the strengthening from nanocrystalline zirconium with the strain hardening provided by coarse-grained zirconium. Localized plastic deformation is effectively suppressed, instead of a uniform and fish-scale overall deformation. (C) 2013 Elsevier B.V. All rights reserved.
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