Yonsei University

DongHyun Bae

Hun Sik Kang

KwangMin Choi

Sangjun Lee

Jonggyu Jeon

SeungWon Kang

An aluminum alloy material according to an embodiment of the present invention is an aluminum alloy including a grain boundary and a plurality of grains divided by the grain boundary, and having a face-centered cubic crystal structure, and includes a band formed by employing one or more non-metallic elements selected from oxygen (O), carbon (C) and nitrogen (N) in an aluminum matrix. Each of the grains includes a plurality of sub-grains divided by a low-angle grain boundary (LAGB), and a band positioned at the low-angle grain boundary may form a coherent interface with an aluminum matrix. Since a plurality of dislocations already are present in the band, a dislocation cell size is reduced during plastic deformation, which greatly contributes to an improvement in elongation. Such an aluminum alloy material can be subjected to cold rolling at a high reduction rate, and as a result, a plate having significantly improved elongation can be obtained.

Aluminium alloy material and method of manufacturing the same

There is provided a Mg&#x2014;N-A based magnesium material (A is a metal or non-metal element configuring a nitride, N: nitrogen originating from the nitride). The magnesium material includes a spherical Mg&#x2014;N-A eutectic phase and nitrogen atoms are dispersed in a magnesium matrix, whereby mechanical and ignition properties of the magnesium material are improved, as compared to a magnesium material or pure magnesium material in which the nitrogen atoms are not included and only the metal or non-metal element is included.

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DongHyun Bae