Discontinuous plastic flow in stainless steels subjected to combined loads at extremely low temperatures
Authors:
- J. Tabin,
- B. Skoczeń,
- J. Bielski
Abstract
In the present paper, the question of the mechanism of discontinuous plastic flow (DPF) occurring at extremely low temperatures (in the proximity of absolute zero), is for the first time raised in the context of kinematically controlled combined loads (independent control of displacement and rotation) and non-proportional loading paths. In order to identify the multiaxial stress state during DPF, a unique set-up for testing tubular samples under kinematically controlled traction and torsion in liquid helium (4.2 K) has been developed. The results of tests performed on grade 304 stainless steel thin-walled tubular samples subjected to combined loads (traction and torsion) in the proximity of absolute zero are for the first time reported. These novel results confirm the assumptions accepted when building the multiaxial constitutive model of discontinuous plastic flow, namely, the production of lattice barriers, the pile-ups of dislocations and the criterion of their collective failure, as well as the assumption that the serrations may be recorded by force and torque transducers independently. Thus, the numerically implemented model allows to reproduce the observed serrations, and to redistribute them between the loading directions.
- Record ID
- CUT08e3549264604924a619965638bc9bc0
- Publication categories
- ;
- Author
- Journal series
- International Journal of Mechanical Sciences, ISSN 0020-7403, e-ISSN 1879-2162
- Issue year
- 2021
- Vol
- 200
- Pages
- [1-42]
- Article number
- 106448
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 37-40; Oznaczenie streszczenia - Abstr.; Data udostępnienia on-line - 2021-04-14; Numeracja w czasopiśmie - Vol. 200
- Keywords in English
- plasticity, discontinuous plastic flow, cryogenic temperatures, combined loads, non-proportional loading paths
- DOI
- DOI:10.1016/j.ijmecsci.2021.106448 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/abs/pii/S0020740321001831 Opening in a new tab
- Related project
- Wieloskalowy model mechanizmów pękania materiałów niejednorodnych w warunkach obciążeń złożonych w ekstremalnie niskich temperaturach. . Project leader at PK: , ,
Projects financed by NSC [Projekty finansowane przez NCN] - Language
- eng (en) English
- Score (nominal)
- 140
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT08e3549264604924a619965638bc9bc0/
- URN
urn:pkr-prod:CUT08e3549264604924a619965638bc9bc0
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.