ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The evolution of texture and deformation in the grains during one pass of equal-channelangular pressing (ECAP) was examined for fine grained high strength and low strength Al alloysand a coarse grained low strength Al alloy. The materials were analysed using electron back-scatterdiffraction (EBSD). The results are consistent with the materials responding to the intensemacroscopic shear stress by deformation of individual grains through movement of dislocations onone or more of the slip crystallographic slip planes {hkl} that are favourably oriented, combinedwith the rotation of grains to directions that bring main crystallographic slip planes parallel to themacroscopic shear direction and crystallographic slip directions 〈uvw〉 parallel to two main sheardirections. Contrary to reports claiming up to 4 slip systems are activated, it was observed that onlythe {111}〈110〉 and {001}〈110〉 shear systems are activated. Macroscopic shear deformationoccurs on two shear planes: the main shear plane (MSP), equivalent to the simple shear plane, and asecondary shear plane which is perpendicular to the MSP
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.584-586.679.pdf
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