Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy

Autor:	Z. G. Zhu, X. H. An, W. J. Lu, Z. M. Li, F. L. Ng, X. Z. Liao, U. Ramamurty, S. M. L. Nai, J. Wei
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	high entropy alloy selective laser melting hierarchical microstructure deformation twinning phase transformation Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 7, Iss 11, Pp 453-459 (2019)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2019.1650131
Popis:	An interstitial solute strengthened high entropy alloy (iHEA), Fe49.5Mn30Co10Cr10C0.5 (at.%), was successfully additively manufactured via selective laser melting. The as-built iHEA exhibits a hierarchically heterogeneous microstructure with length scales across several orders of magnitude, which engenders an enhanced strength–ductility combination relative to those fabricated by conventional processing routes. The high yield strength mainly stemmed from the dislocation strengthening besides the friction stress and grain boundary strengthening. The joint activation of multiple deformation mechanisms involving dislocation slip, deformation twinning and phase transformation can maintain the steady work-hardening behavior at high stress levels, leading to a high ductility.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/493761c6b2ee44048febef6e96dee604 Zobrazit plný text záznamu View record in DOAJ