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:
All the SPD techniques introduce reversal straining principally, but effects of the reversaldeformation on structure evolution were not studied directly yet. In the present work, an attempt wasmade to manage structure in pure (99.99%) Al by strain reversal through high pressure torsion (HPT).Total accumulated deformation up to equivalent strain ~8 was used. General trend of the grainrefinement is similar for both deformation modes; and it is typical with all other SPD processed FCCmetals. At the same time, the difference in microstructure evolution at the vicinity of the specimenaxis and with increasing distance in the radial direction introduces microstructural heterogeneitieswhich are specific features of the reversal straining. In the monotonic deformation process the A({111}〈011〉) fiber is gradually substituted by the C component ({ 0 0 1}〈 1 1 0〉) with increasingstrain before it is found to weaken. In the reverse straining process the A fiber is found to dominate thedeformation texture in the low strain region. In the reverse straining process at high strain level, a{001}〈100〉 component appear
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.584-586.133.pdf
Permalink