Overcoming the strength-ductility trade-off in refractory medium-entropy alloys via controlled B2 ordering

Autor:	N. Yurchenko, E. Panina, A. Tojibaev, S. Zherebtsov, N. Stepanov
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	Refractory medium-entropy alloys B2 ordering short-range order strength-ductility trade-off mechanical properties Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 10, Iss 12, Pp 813-823 (2022)
Druh dokumentu:	article
ISSN:	21663831 2166-3831
DOI:	10.1080/21663831.2022.2109442
Popis:	Herein, we showed that controlled additions of Al, which provided a certain degree of B2 ordering, resulted in a ∼ 37%-enhancement of both yield strength and uniform elongation in Alx(NbTiZr)100-x (x = 0; 2.5; 5; 7.5 at.%) refractory medium-entropy alloys. The improvement of properties stemmed from the solid solution and short-range order strengthening, as well as from the alteration in a character of dislocation glide. The B2 ordering caused the formation of multiple dislocation bands and the activation of cross-slip, which improved the macroscopic stability of plastic flow and extended the strengthening stage, thereby postponing necking.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/ae8a5c17ab1747e79f2628824f6775fe Zobrazit plný text záznamu View record in DOAJ