The microstructural characteristics of ultrafine-grained nickel
作者： AP Zhilyaev , B-K Kim , JA Szpunar , MD Baró , TG Langdon
DOI: 10.1016/J.MSEA.2004.09.030
关键词:
摘要: A detailed investigation was conducted to evaluate the microstructural characteristics in samples of pure nickel processed using three different procedures severe plastic deformation (SPD): equal-channel angular pressing (ECAP), high-pressure torsion (HPT) and a combination ECAP HPT. Several experimental techniques were employed measure grain size distributions, textures, distributions misorientation angles boundary surface energies as-processed materials. It is shown that HPT leads both greater refinement microstructure smaller fraction boundaries having low misorientation. The estimated higher than anticipated from data for coarse-grained materials difference attributed non-equilibrium character many interfaces after SPD processing.
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