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A novel structural gradient metallic glass composite was formed by subjecting fully glassy alloy to surface mechanical attrition treatment. The structural gradient consisted of submicron-scale crystallites on the top surface, followed by nano-scale crystallites and a fully amorphous glass matrix inside. Plasticity was greatly improved by up to about 400% comparing with that of as-cast metallic glass...
NbCr 2 Laves phase alloys doped by rare earth yttrium were fabricated by mechanical alloying and hot pressing. The effect of yttrium addition content on the fracture toughness of these alloys was investigated. The experimental results show that a minor addition of yttrium can refine the microstructure and toughen NbCr 2 Laves phase. When the content of yttrium in NbCr 2 is...
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