%0 Journal Article %T CYCLIC PLASTIC BEHAVIOUR OF UFG COPPER UNDER CONTROLLED STRESS AND STRAIN LOADING %A Lucie Navr¨¢tilov¨¢ %A Karel Obrtl¨ªk %A Ludv¨ªk Kunz %J Materials Engineering %D 2012 %I Faculty of Mechanical Engineering, Univerzity of Zilina %X The influence of stress- and strain-controlled loading on microstructure and cyclic plastic behaviour of ultrafine-grained copper prepared by equal channel angular pressing was examined. The stability of microstructure is a characteristic feature for stress-controlled test whereas grain coarsening and development of bimodal structure was observed after plastic strain-controlled tests. An attempt to explain the observed behaviour was made. %K UFG Cu %K ECAP %K Fatigue %K Stress- and strain-controlled loading %U http://fstroj.uniza.sk/journal-mi/PDF/2012/03-2012.pdf