The United States has developed super-strong aluminum alloy materials

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Researchers at purdue university in the United States have developed a kind of super-strong aluminum alloy material with great industrial application potential. The softness and low mechanical strength of most lightweight aluminum alloys have affected extensive industrial applications, and the strength of this high-strength lightweight aluminum alloy is comparable to that of stainless steel.
The findings are published in the current issue of advanced materials and nature communications in November 2017. This paper focuses on how to change the microstructure of aluminum materials to obtain high strength and ductility. This high-strength aluminium alloy is produced by introducing "stack dislocation" or distortion in crystal structures. The metal lattice consists of a series of repeated atomic layers, which, if one layer is missing, become a stack fault. The twin boundary is composed of two layers of stack fault.
A stacking fault called 9R phase has special significance. The researchers used a special method to introduce 9R phase and twin boundary into aluminum, increasing the strength and ductility and thermal stability. The industrial application of the material will revolutionize the automotive and aerospace industries.

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