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:
Deformation structures produced by high pressure torsion (HPT) and accumulativeroll-bonding (ARB) were characterized by transmission electron microscopy and electron backscatterdiffraction, and the mechanical properties of the ARB samples were determined by uniaxial tensiletesting. The structural evolution during HPT in high purity nickel has been examined and an extendedlamellar boundary structure was observed at high strains. For ARB samples deformed to high strains,an almost similar structural morphology has been observed in both interstitial free steel and incommercial purity aluminum, whereas a relatively equiaxed structural morphology was observed inhigh purity aluminum samples. In all samples, both deformed by HPT and ARB, the deformationstructures were composed of a large fraction of high-angle boundaries, together with low-angleboundaries and isolated dislocations between the boundaries. Common characteristics have beenidentified in the mechanical behavior of the ARB samples, namely a very high strength, a smalluniform elongation and a relatively large post-uniform elongation after necking. For HPT and ARBthe structural morphology and structural parameters are compared, and for the ARB samplesstructure-property relationships are also discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.579.135.pdf
