Počet záznamů: 1
High temperature deformation mechanisms in the 14% Cr ODS alloy
- 1.0479202 - ÚFM 2018 RIV CH eng J - Článek v odborném periodiku
Šiška, Filip - Stratil, Luděk - Hadraba, Hynek - Fintová, Stanislava - Kuběna, Ivo - Záležák, Tomáš - Bártková, Denisa
High temperature deformation mechanisms in the 14% Cr ODS alloy.
Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. Roč. 689, MAR (2017), s. 34-39. ISSN 0921-5093. E-ISSN 1873-4936
Grant CEP: GA ČR(CZ) GA14-25246S; GA ČR GJ15-21292Y
Institucionální podpora: RVO:68081723
Klíčová slova: ODS steel * Plasticity * Stress relaxation * Dislocations
Obor OECD: Materials engineering
Impakt faktor: 3.414, rok: 2017
The stress relaxation behavior of the ODM401 ODS steel is tested at the temperature range 400-800(circle)C in order to investigate the deformation mechanisms. The repeated relaxation tests are performed on the tensile specimens within the plastic strain range 10(-4)-10(-1). The deformation mechanisms are analyzed in terms of an activation volume, dislocation density and velocity, a thermal stress component and a strain rate hardening. The deformation is driven by the dislocation glide and climb. Dispersed particle-dislocation interactions is a dominant effect at temperatures 400-600(circle)C. Short-range interactions between dislocations and a lattice are most significant at 600(circle)C. The non-conservative motion of dislocations becomes-active at temperatures above 600(circle)C. The majority of the mobile dislocations is not trapped and is able to move freely in the microstructure.
Trvalý link: http://hdl.handle.net/11104/0276037
Počet záznamů: 1