Aluminium Allyos - New Trends in Fabrication and Applications

0386286 - ÚFM 2013 RIV HR eng M - Monography Chapter
Sklenička, Václav - Dvořák, Jiří - Svoboda, Milan - Král, Petr - Kvapilová, Marie
Equal-Channel Angular Pressing and Creeep in Ultrafine-Grained Aluminium and its Alloys.
Aluminium Allyos - New Trends in Fabrication and Applications. Rijeka: InTech, 2012 - (Zaki, A.), s. 3-45. ISBN 978-953-51-0861-0
R&D Projects: GA ČR(CZ) GAP108/11/2260; GA MŠMT(CZ) ED1.1.00/02.0068
Institutional support: RVO:68081723
Keywords : ultrafine-grained aluminium * ECAP * creep
Subject RIV: JG - Metallurgy

Creep strength and ductility are the key creep properties of creep-resistant materials but these properties typically have opposing characteristics. Thus, materials with conventional grain sizes may be strong or ductile but there are rarely both. In this connection, recent findings of high strength and good ductility in several submicrometer metals and alloys are of special interest. Processing through the application of severe plastic deformation (SPD) is now an accepted procedure for producing bulk ultrafine-grained materials having grain sizes in the submicrometer or nanometer range. The use of SPD enhances certain material properties through the introduction of an ultrafine-grained microstructure. The ultrafine size of the grains in the bulk materials generally leads to significantly improved properties by comparison with polycrystalline materials having conventional grain sizes of the same chemical composition. Several SPD processing techniques are currently available but the most attractive technique is equal-channel angular pressing (ECAP), where the sample is pressed through a die constrained within a channel bent through an abrupt angle.
Permanent Link: http://hdl.handle.net/11104/0219656