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000858864 245__ $$aMicrostructural and mechanical characterization of an equiatomic YGdTbDyHo high entropy alloy with hexagonal close-packed structure
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000858864 520__ $$aThe 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.
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000858864 7001_ $$0P:(DE-HGF)0$$aYao, M.$$b2
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000858864 7001_ $$0P:(DE-HGF)0$$aStein, F.$$b4
000858864 7001_ $$0P:(DE-Juel1)130637$$aFeuerbacher, M.$$b5
000858864 7001_ $$00000-0003-0194-6124$$aRaabe, D.$$b6
000858864 7001_ $$0P:(DE-HGF)0$$aDehm, G.$$b7$$eCorresponding author
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