V-stabilized γ′′ phase: a new pathway to enhanced intermediate-temperature ductility in NiCoCr-based multi-component alloys

Autor:	Yunwei Pan, Anping Dong, Yang Zhou
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	Multi-component alloy D022 superlattice metastable phases precipitation strengthening intermediate-temperature ductility Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Pp 1-8 (2024)
Druh dokumentu:	article
ISSN:	21663831 2166-3831
DOI:	10.1080/21663831.2024.2429594
Popis:	This work proposes a new design strategy for overcoming the strength-ductility trade-off of γ′′-strengthened multi-component alloys at intermediate-temperatures. By increasing the V content, the alloy’s ductility is enhanced accordingly (650°C tensile-elongation, 9.85%→15.97%) without compromising strength. This enhancement is attributed to the improved stability of γ′′, which results in a suppression of brittle ε lamellae forming at grain boundaries after deformation and a reduction in γ/γ′′ lattice misfit. Concurrently, the increasing V content increases the γ′′ volume fraction, offsetting potential strength loss due to the lattice misfit reduction.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/545b5463b4104d5ba5c361deb2a165f2 Zobrazit plný text záznamu View record in DOAJ