Szczegóły publikacji
Opis bibliograficzny
The effect of temperature on detwinning and mechanical properties of face-centered cubic deformation twins / M. S. SZCZERBA, M. J. Szczerba // Acta Materialia ; ISSN 1359-6454 . — Tytuł poprz.: Acta Metallurgica et Materialia. — 2024 — vol. 263 art. no. 119491, s. 1–13. — Bibliogr. s. 13, Abstr. — Publikacja dostępna online od: 2023-11-03
Autorzy (2)
- AGHSzczerba Marek
- Szczerba Maciej Jakub
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 151417 |
|---|---|
| Data dodania do BaDAP | 2024-02-27 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.actamat.2023.119491 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Acta Materialia |
Abstract
Inverse temperature dependences of the detwinning stress of face-centered cubic deformation twins were discovered by studying the effect of elevated temperatures on plastic deformation properties of multilayer twin/matrix structure of the Cu-8at.%Al alloy. The critical stress of detwinning was found to increase remarkably with temperature when plastic yielding of the twin/matrix structure occurred by the π detwinning mode. However, when the alternative π/3 mode of detwinning was involved, a decrease of the detwinning stress with an increase of temperature was observed, instead. Thus, the twin/matrix structure behaved in two opposite ways, showing anneal hardening (the case of π mode) or anneal softening (the case of π/3 mode) upon temperature increase. As concluded, the dual effect of temperature on the detwinning stress resulted from irreversible reduction of internal stresses pre-existing within the deformation twins. The complete reduction of the internal stresses at about 530 °C led to the equivalence of the critical stresses of different detwinning modes and a large decrease of the yield stress anisotropy of the twin/matrix structure. It was postulated that temperature induced annihilation of the internal stresses resulted from constriction of extended cube dislocations pre-existing within deformation twins. The temperature limit of about 540 °C, beyond which the twin/matrix structure became unstable due to recrystallization, was also established. Moreover, transfer of plastic shear throughout the twin/matrix structure was found to be predominantly controlled by internal dislocation substructure of deformation twins, not by the twin/matrix interfaces. © 2023 The Author(s)
