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:
It is known that well developed 〈111〉//ND texture increases Lankford value (r-value) ofnot only bcc metals but also fcc metals and alloys. However, 〈111〉//ND texture cannot be formedin fcc metals by conventional rolling and annealing processes. The 〈111〉//ND orientation is one ofthe major components of shear texture. Accordingly, this orientation develops in aluminum sheetwhen shear deformation is introduced.Al-Mg-Si alloy 6016 sheet was processed by two-pass differential speed rolling at roomtemperature under a high friction conditions. The rolling direction of the second pass was soselected that the direction of shear deformation introduced in the second pass was either similar(unidirectional shear rolling) to or opposite (reverse shear rolling) to that in the first pass. The rollspeed ratio was 2.0. Large shear strain was successfully introduced through the thickness uniformlyby the differential speed rolling. The shear texture with major components of {001}〈110〉 and{111}〈110〉 were developed throughout the thickness. Though large reduction in thickness of 75%was applied to the sheets by the rolling, conventional rolling texture such as {112}〈111〉 or{123}〈643〉 orientation was not detected in any part of the thickness. By solution treatment afterthe rolling, intensity of shear texture weakened and grain size decreased. It has been found thatr-value is improved by the differential speed rolling subsequently followed by solution treatment
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.558-559.1443.pdf
Permalink
