Abstract
Crack tip fields in ductile crystals were studied using diffusion bonded copper single crystals for the two orientations studied by Rice. An optical microscope, stylus profilometer, and X-ray were used to study slip traces on specimen surfaces, surface profiles and lattice rotations, respectively. The plastic zone developed as an assemblage of fan-shaped sectors, the details of which depended on the crystal orientation and the latent hardening behaviors of the crystal. Resultantly, deformation fields of the two orientations were substantially different from each other and also from theoretical predictions as well. Etch pit observations of the specimen interior showed slips on the secondary (or tertiary) systems to meet the compatibity requirement, and that crack tip plastic sectors found on specimen surfaces are reasonably valid in the specimen interior as well, particularly for the B orientation. A simple plane strain model based on exclusive latent hardening could explain many features of experimental results observed on specimen surfaces and specimen interiors reasonably.
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Yu, J., Cho, J.W. (2000). Crack Tip Plasticity in Copper Single Crystals. In: Chuang, T.J., Rudnicki, J.W. (eds) Multiscale Deformation and Fracture in Materials and Structures. Solid Mechanics and Its Applications, vol 84. Springer, Dordrecht. https://doi.org/10.1007/0-306-46952-9_17
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DOI: https://doi.org/10.1007/0-306-46952-9_17
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