Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7972651 | Materials Science and Engineering: A | 2018 | 8 Pages |
Abstract
The Zn-0.5Cu alloy was investigated in as-cast, homogenized state and after carrying out equal channel angular pressing four times at room temperature via route BC. Microstructure analysis using light microscopy and SEM/EBSD was performed, as well as tensile tests, misorientation angle distribution and texture analysis. The initial microstructure with the average grain size of 560â¯Âµm was refined to a grain size of approx. 1â¯Âµm. The obtained microstructure consists of uniaxial grains separated mostly by high angle grain boundaries. Mechanical characterization was performed at strain rates from 2â¯Ãâ¯10â6 sâ1 to 1â¯sâ1 at room temperature. Ultrafine-grained zinc-copper alloy exhibited 510% elongation with the strain rate sensitivity equal 0.31, which was the first observation of room temperature superplasticity in Zn-Cu alloys. Based on the microstructure, misorientation angle and texture analysis, the main operating deformation mechanisms were distinguished for samples deformed at strain rates from 2â¯Ãâ¯10â5 sâ1 to 10â1 sâ1.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Wiktor Bednarczyk, Jakub KawaÅko, Maria WÄ
troba, Piotr BaÅa,