The "strength-plasticity" inverted relationship that has long restricted the development of traditional metal structural materials is widespread in high-entropy alloys, because its plastic deformation mechanism is often considered to be essentially indistinguishable from traditional metal materials
In response to this scientific problem, the researchers of the Institute of Metals have adopted a simple and efficient small-angle reciprocating torsion gradient plastic deformation technology to keep the original crystal grains in the Al0.
Combined with the multi-scale microstructure characterization technology, it is found that the gradient dislocation structure in the high-entropy alloy activates the partial dislocation-stacking fault-induced plastic deformation mechanism during the plastic deformation process
This work reveals the unique deformation mechanism of high-entropy alloys, and also shows that simple and easy reciprocating torsion gradient plastic deformation technology can be widely used in the construction and preparation of gradient structure materials, and has important basic research and application value
Figure 1 Typical gradient dislocation structure in Al 0.
Figure 2 Mechanical properties and deformation mechanism of Al 0.
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