Strong Crack Blunting by Hierarchical Nanotwins in Ultrafine/Nano-grained Metals
نویسندگان
چکیده
منابع مشابه
Effect of Crack Blunting on Subsequent Crack Propagation
Theories of toughness of materials depend on an understanding of the characteristic instabilities of the crack tip, and their possible interactions. In this paper we examine the effect of dislocation emission on subsequent cleavage of a crack and on further dislocation emission. The work is an extension of the previously published Lattice Greens Function methodology[1, 2, 3]. We have developed ...
متن کاملUltrafine-Grained Metals
Ultrafine-grained (UFG) metallic materials are at the cutting edge of modern materials science as they exhibit outstanding properties which make them very interesting for prospective structural or functional engineering applications. Due to the progress in severe plastic deformation techniques during the last decade, ultrafine-grained microstructures are no longer only restricted to easy to def...
متن کاملCrack blunting, crack bridging and resistance-curve fracture mechanics in dentin: effect of hydration.
Few studies have focused on a description of the fracture toughness properties of dentin in terms of resistance-curve (R-curve) behavior, i.e., fracture resistance increasing with crack extension, particularly in light of the relevant toughening mechanisms involved. Accordingly, in the present study, fracture mechanics based experiments were conducted on elephant dentin in order to determine su...
متن کاملSuper-strengthening and stabilizing with carbon nanotube harnessed high density nanotwins in metals by shock loading
CNTs reinforced metal composites has great potential due to their superior properties, such as light weight, high strength, low thermal expansion and high thermal conductivity. The current strengthening mechanisms of CNT/metal composite mainly rely on CNTs' interaction with dislocations and CNT's intrinsic high strength. Here we demonstrated that laser shock loading the CNT/metal composite resu...
متن کاملCrack blunting and the strength of soft elastic solids
When a material is so soft that the cohesive strength (or adhesive strength, in the case of interfacial fracture) exceeds the elastic modulus of the material, we show that a crack will blunt instead of propagating. Large-deformation nite-element model (FEM) simulations of crack initiation, in which the debonding processes are quanti ed using a cohesive zone model, are used to support this hy...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Materials Research Letters
سال: 2015
ISSN: 2166-3831
DOI: 10.1080/21663831.2015.1048905