ISSN:
1013-9826
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:
Oxygen-free copper was processed by equal channel angular pressing with differentnumbers of ECAP process cycles, NP. Tensile strength was increased with an increase in NP, but ittended to saturate after NP = 4. Conversely, elongation was dramatically decreased by first pressing,but it tended to saturate up to NP = 3, followed by slight increasing trend after NP = 4. Fatigue tests ofspecimens processed with NP = 4 and 8 were performed. The change in surface morphologies duringfatigue was monitored successively. In addition to this, the change in surface hardness was measured.Significant decrease in surface hardness due to cyclic stresses was measured. The physical basis offatigue damage of UFG copper was discussed based on the experimental results
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1649.pdf