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:
A study was conducted on 7055 Al alloys processed by Equal-channel Angular Pressing(ECAP). The quantitative information about precipitate size, distribution and volume fraction inECAPed samples was investigated by small-angle X-ray scattering (SAXS) and transmission electronmicroscopy (TEM). It is found that with the number of ECAP increasing, the quantitative informationabout volume fraction (fv), precipitate size (R), specific inner surface of particle-matrix (Sp), andintegrated intensity (Q0) all increased, indicating that ECAP enhanced the nucleation and growth ofprecipitates. The microhardness of samples after two passes of ECAP is higher than that of T6 treatedsamples even after 96 h at 120℃. The formation of fine grains, higher volume fraction of precipitates,together with strain hardening induced by severe deformation are the main factors leading to a highmicrohardness in ECAPed samples
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.839.pdf
Permalink