Dölling, Julia (2025) Precipitation and strengthening mechanisms in Cu-0.27wt.% Sc alloy: Linking thermomechanical treatment, microstructure and properties. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 945 (149022), Seiten 1-17. Elsevier. doi: 10.1016/j.msea.2025.149022. ISSN 0921-5093.
|
PDF
- Verlagsversion (veröffentlichte Fassung)
12MB |
Offizielle URL: https://www.sciencedirect.com/science/article/pii/S0921509325012468?via%3Dihub
Kurzfassung
Enhanced mechanical and electrical conductivity of low alloyed Cu-Sc alloys were systematically investigated with a focus on precipitation, solid solution, and dislocation strengthening. A Cu-0.27 wt% Sc alloy subjected to 50 % cold rolling and peak aged for 0.5 h at 450 °C achieved a high yield strength of 434 MPa and a conductivity of 42.5 MS/m (73.3 % IACS). The microstructural evolution during aging was characterized by SEM, TEM, and APT, revealing the rapid formation of nanoscale, plate-like Cu4Sc precipitates growing with increasing aging time. The enhanced precipitation response in cold-worked conditions was attributed to dislocation-assisted nucleation and solute flux driven by strain fields. A mechanistic strengthening model incorporating work, solid solution, and particle hardening accurately predicts the time-dependent mechanical response. The results underline the capability of Sc as an effective alloying element for high-strength, high-conductivity copper alloys. Based on the observed kinetics and mechanisms, a multi-stage thermomechanical treatment involving intermediate deformation steps is proposed to further exploit this strengthening potential.
| elib-URL des Eintrags: | https://elib.dlr.de/216120/ | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Dokumentart: | Zeitschriftenbeitrag | ||||||||
| Titel: | Precipitation and strengthening mechanisms in Cu-0.27wt.% Sc alloy: Linking thermomechanical treatment, microstructure and properties | ||||||||
| Autoren: |
| ||||||||
| Datum: | 28 August 2025 | ||||||||
| Erschienen in: | Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing | ||||||||
| Referierte Publikation: | Ja | ||||||||
| Open Access: | Ja | ||||||||
| Gold Open Access: | Nein | ||||||||
| In SCOPUS: | Ja | ||||||||
| In ISI Web of Science: | Ja | ||||||||
| Band: | 945 | ||||||||
| DOI: | 10.1016/j.msea.2025.149022 | ||||||||
| Seitenbereich: | Seiten 1-17 | ||||||||
| Verlag: | Elsevier | ||||||||
| ISSN: | 0921-5093 | ||||||||
| Status: | veröffentlicht | ||||||||
| Stichwörter: | Atom probe tomography Microstructure evolution Strengthening mechanisms Precipitation modeling | ||||||||
| HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||
| HGF - Programm: | Verkehr | ||||||||
| HGF - Programmthema: | Straßenverkehr | ||||||||
| DLR - Schwerpunkt: | Verkehr | ||||||||
| DLR - Forschungsgebiet: | V ST Straßenverkehr | ||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | V - FFAE - Fahrzeugkonzepte, Fahrzeugstruktur, Antriebsstrang und Energiemanagement | ||||||||
| Standort: | Stuttgart | ||||||||
| Institute & Einrichtungen: | Institut für Fahrzeugkonzepte > Werkstoff- und Verfahrensanwendungen Gesamtfahrzeug | ||||||||
| Hinterlegt von: | Dölling, Julia | ||||||||
| Hinterlegt am: | 24 Sep 2025 09:26 | ||||||||
| Letzte Änderung: | 17 Okt 2025 12:58 |
Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags