Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7971713 | Materials Science and Engineering: A | 2018 | 19 Pages |
Abstract
Changes in the structure of coarse-grained nickel due to ultrasonic treatment (UST) are studied. For this purpose, commercially pure nickel was annealed at a temperature of 1300â¯Â°C for 1â¯h to obtain a coarse-grained structure with a low dislocation density. On the electrolytically polished surface of the sample, a 2â¯Ãâ¯2â¯mm2 sized area was marked and investigated by EBSD analysis. Further, the sample was subjected to UST with an oscillating stress amplitude of 20â¯MPa, and the marked area was polished and scanned again. X-ray diffraction analysis and microhardness measurements were carried out before and after UST as well. It is shown that UST leads to dislocation generation, an increase in the fraction of low-angle boundaries, changes in the shape of twins and grain boundaries. The dependence of structural parameters and microhardness on the UST amplitude is also described.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
A.P. Zhilyaev, A.A. Samigullina, A.A. Nazarov, E.R. Shayakhmetova,