Dynamic grain coarsening in creep of pure Cu at 0.42 Tm after predeformation by ECAP

0496155 - ÚFM 2019 RIV CH eng J - Článek v odborném periodiku
Blum, W. - Dvořák, Jiří - Král, Petr - Sklenička, Václav
Dynamic grain coarsening in creep of pure Cu at 0.42 Tm after predeformation by ECAP.
Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. Roč. 731, JUL (2018), s. 520-529. ISSN 0921-5093. E-ISSN 1873-4936
Grant CEP: GA MŠMT(CZ) LQ1601
Institucionální podpora: RVO:68081723
Klíčová slova: Cu * Recovery * Grain coarsening * Creep * Grain boundaries
Obor OECD: Materials engineering
Impakt faktor: 4.081, rok: 2018

Microcrystalline Cu99.99 produced by equal channel angular pressing and static recrystallization was deformed in tensile and compressive creep at 573 K. Discontinuous coarsening of grains led to dramatic changes of creep rate. These reflect general hardening as the grains coarsen, superimposed by transient net softening when grain boundary migration activity peaks. The strength at the first minimum of creep rate is modeled by treating the material as a composite of subgrain-free and subgrain-containing grains with different recovery kinetics.
Trvalý link: http://hdl.handle.net/11104/0288965