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Current Issue of Nature

Current Issue : Nature

Current Issue

Volume 545 Number 7652 pp5-128

4 May 2017

About the cover

The cover shows the microstructure of an exceptionally strong thin-film magnesium alloy captured using transmission electron microscopy. Produced by dual-phase nanostructuring, this alloy has a strength that approaches the ideal theoretical limit. Nanostructuring of crystalline metal alloys can yield high-strength materials, but these tend to soften as the strain is increased. In this latest work, Jian Lu and his team combine the benefits of nanocrystallinity with those of single-phase amorphous metallic glasses to yield a dual-phase material — MgCu2 nanocrystalline grains (6 nm) enclosed in an amorphous glassy shell (2 nm) — that resulted in the strongest thin-film magnesium alloy to be made so far. Cover image: Susanna Siu & Ge Wu/City University of Hong Kong

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