Competition between prismatic and basal slip in hexagonal titanium–aluminum alloys with short-range order

Autor:	P. Kwasniak, S. Delannoy, F. Prima, E. Clouet
Jazyk:	angličtina
Rok vydání:	2023
Předmět:	Titanium–aluminum alloys ordering plasticity dislocations Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 11, Iss 6, Pp 407-413 (2023)
Druh dokumentu:	article
ISSN:	21663831 2166-3831
DOI:	10.1080/21663831.2023.2169082
Popis:	Plasticity of hexagonal titanium–aluminum alloys depends on the solute concentration and the order state of Al atoms. Development of short-range order (SRO) modifies Al strengthening and impacts the competition between prismatic and basal slip modes. Using ab initio calculations, we study the interaction of a screw dislocation with isolated Al atoms and Al pairs in an hcp Ti existing in short-range ordered Ti–Al alloys. Calculated activation energies reveal pronounced hardening caused by Al addition for both slip systems, which become competitive. This hardening is enhanced for Al pairs, resulting in a reduced plastic anisotropy of Ti–Al alloys with SRO.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/57f5ca96dfaa42abbb0327836565e7fb Zobrazit plný text záznamu View record in DOAJ