Quasi-Stationary Strength of ECAP-Processed Cu-Zr at 0.5 T-m

0517117 - ÚFM 2020 RIV CH eng J - Journal Article
Blum, W. - Dvořák, Jiří - Král, Petr - Eisenlohr, P. - Sklenička, Václav
Quasi-Stationary Strength of ECAP-Processed Cu-Zr at 0.5 T-m.
Metals. Roč. 9, č. 11 (2019), č. článku 1149. E-ISSN 2075-4701
Institutional support: RVO:68081723
Keywords : Cu-Zr * ECAP * deformation * quasi-stationary * subgrains * grains * coarsening
OECD category: Materials engineering
Impact factor: 2.117, year: 2019
Method of publishing: Open access
https://www.mdpi.com/2075-4701/9/11/1149/htm

The influence of the grain structure on the tensile deformation strength is studied for precipitation-strengthened Cu-0.2%Zr at 673K. Subgrains and grains are formed by equal channel angular pressing (ECAP) and annealing. The fraction of high-angle boundaries increases with prestrain. Subgrains and grains coarsen during deformation. This leads to softening in the quasi-stationary state. The initial quasi-stationary state of severely predeformed, ultrafine-grained material exhibits relatively high rate-sensitivity at relatively high stresses. This is interpreted as a result of the stress dependences of the quasi-stationary subgrain size and the volume fraction of subgrain-free grains.
Permanent Link: http://hdl.handle.net/11104/0302510