1,720,981 research outputs found
Ultrafine grained alloys produced by severe Plastic deformation: issues on microstructural control and echanical behaviour
No full textAging behaviour and mechanical prpperties of a solutions treated and ECAP prpcessed commercial AA6082 alloy
No full textIntermetallic particle evolution during ECAP processing of a 6082 alloy
No full textIntermetallics evolution in a commercial 6082 aluminium alloy severely deformed by Equal Channel Angular Pressing was investigated.
Chemical electron probe microanalyses allowed to state that in the severely deformed alloy, Si-rich phases were progressively dissolved whereas the amount and composition of the Fe-Mn-Si containing intermetallics remained substantially unchanged. The moderate hardening effect
measured on isothermal aging at 130C of the ECAP processed samples was accounted for by the reprecipitation of the phases dissolved during severe plastic deformation. Tensile tests and fractographic analyses on the broken specimens showed that the 6082 alloy featured a relatively
high ductility and a substantially unaltered fracture mode even after several ECAP passes
Texture, microstructure and mechanical properties of asymmetrically rolled AA6082 Aluminium alloy
No full textInfluenza della laminazione asimmetrica in condizioni di deformazione severa sulla tessitura di nastri in lega di alluminio
No full textAging behaviour and mechanical properties of a solution treated and ECAP processed 6082 alloy
No full textA study was carried out on the aging behaviour of a solution treated 6082 aluminium alloy deformed by equal channel angular pressing up to six passes. Aging of the so obtained ultrafine alloy was studied by DSC and TEM analyses as well as by isothermal treatments at 130, 160 and 180C. The results showed that the formation of metastable beta double prime and beta prime precipitates were markedly anticipated and that the stable phase was partially suppressed in the alloy processed to 4 and 6 passes, presumably due to anticipated precipitation of Si-rich particles. TEM analyses revealed that a transition in strengthening-precipitate structure occurred in the severely deformed alloy leading to a predominance of globular precipitates over the rod like phases typically found in the undeformed and aged samples. Tensile tests carried out on severely deformed and aged samples allowed to quantify the maximum strength achievable by the 6082 alloy after concurrent grain refinement and peak-hardness aging
at 130C
A comparison between asymmetric rolling and accumulative roll bonding as a means to refine the grain structure of an Al-Mg-Si alloy
No full text
- …
