Thermo-mechanical response of single-phase face-centered-cubic AlxCoCrFeNi high-entropy alloy microcrystals

Autor:	Quan Jiao, Gi-Dong Sim, Mageshwari Komarasamy, Rajiv S. Mishra, Peter K. Liaw, Jaafar A. El-Awady
Jazyk:	angličtina
Rok vydání:	2018
Předmět:	High-entropy alloys solid-solution strengthening in situ experiments high-temperature deformation Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 6, Iss 5, Pp 300-306 (2018)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2018.1446468
Popis:	The response of [100]-oriented single-crystal face-centered-cubic Al0.1CoCrFeNi and Al0.3CoCrFeNi high-entropy alloy (HEA) microcrystals tested from 293 to 573 K by means of in situ micro-compression is reported. At all temperatures, plasticity is governed by dislocation slip with significant strain hardening and intermittent strain bursts observed. A model, which is in good agreement with experimental measurements, is also developed to predict the effects of Al concentration, temperature, and crystal size on the strength of HEAs. The model interestingly predicts a softening response with an increase in Al concentration when the crystal size is ≤0.1 µm. Finally, this model can guide the development of advanced HEAs for small-scale applications.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/ea4652924533441fad8c0806023ab381 Zobrazit plný text záznamu View record in DOAJ