%0 Journal Article
%A Soler, R.
%A Evirgen, A.
%A Yao, M.
%A Kirchlechner, C.
%A Stein, F.
%A Feuerbacher, M.
%A Raabe, D.
%A Dehm, G.
%T Microstructural and mechanical characterization of an equiatomic YGdTbDyHo high entropy alloy with hexagonal close-packed structure
%J Acta materialia
%V 156
%@ 1359-6454
%C Amsterdam [u.a.]
%I Elsevier Science85412
%M FZJ-2018-07700
%P 86 - 96
%D 2018
%X The microstructural and mechanical characterization of an equiatomic YGdTbDyHo high entropy alloy with hexagonal close-packed structure was performed. The phase state and chemical homogeneity of the solid solution were analysed with respect to crystal structure, phase stability, and oxide formation. It was found that Y-rich precipitates form at grain boundaries and that the alloy is prone to oxidation, leading to a homogeneous distribution of ∼10 nm-sized oxides in the grain interiors. The plastic response at the sub-grain level was studied in terms of the activated slip systems, critical resolved shear stresses (CRSS), and strain hardening using micropillar compression tests. We observe plastic slip on the basal <a> system, with a CRSS of 196 ± 14.7 MPa. Particle strengthening and strength dependence on sample size are discussed on the basis of dislocation particle interaction and mechanical size effects.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000442062800009
%R 10.1016/j.actamat.2018.06.010
%U https://juser.fz-juelich.de/record/858864