Cyclic stress-strain behavior of 9Cr1Mo steel at positive mean stress

0177647 - UFM-A 20013151 RIV US eng J - Článek v odborném periodiku
Kunz, Ludvík - Lukáš, Petr
Cyclic stress-strain behavior of 9Cr1Mo steel at positive mean stress.
Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. 319-321, - (2001), s. 555-558. ISSN 0921-5093. E-ISSN 1873-4936.
[International Conference on the Strength of Materials /12./. Asilomar, CA, 27.08.2000-01.09.2000]
Grant CEP: GA AV ČR IBS2041001
Výzkumný záměr: CEZ:AV0Z2041904
Klíčová slova: cyclic plasticity * mean stress * cyclic creep
Kód oboru RIV: JL - Únava materiálu a lomová mechanika
Impakt faktor: 0.978, rok: 2001

Cyclic plastic behavior of a ferritic martensite steel was studied under load controlled cycling with positive mean stress. The results were compared with data determined under symmetrical cycling. Cyclic hardening followed by softening was found to be inherent to cycling at positive mean stress contrary to the symmetrical loading where only continuous softening was observed. For given stress amplitude, higher mean stress results in higher plastic strain amplitude. The onset of cyclic softening and the onset of cyclic creep acceleration occur simultaneously. In the region of cyclic softening a unique relation between the instantaneous cyclic creep rate and the instantaneous plastic strain amplitude was found for cycling at constant mean stress.
Trvalý link: http://hdl.handle.net/11104/0074566