2024-11-14
• Work hardening: also known as deformation strengthening, through plastic deformation (such as rolling, extrusion, forging, stretching, etc.) so that the alloy to obtain high strength. The increase of dislocation density during plastic deformation is the essence of alloy work hardening.
• Solid solution strengthening: the alloy is heated to a certain temperature, so that all the grains in the alloy reach a solid solution state, and then quickly cooled, so that the grains quickly form a complex physical structure, thereby improving the hardness and strength of the material.
• Heterophase strengthening: also known as excess phase strengthening or complex phase strengthening, adding excessive alloying elements to the matrix metal, part of the solid solution, more than the limit solubility of the part can not be dissolved, the formation of excess of the second phase, the alloy to strengthen the role.
• Dispersion strengthening: the strengthening of aluminum alloys by dispersions of non-coherent hard particles. The dispersoids have low solubility and diffusion rate, high hardness (non-deformable) and small particles (about 0.1 μm) in the aluminum matrix, which can hinder the dislocation movement and affect the recrystallization process, thereby increasing the strength.
• Precipitation strengthening: also known as aging strengthening, from the supersaturated solid solution in the precipitation of a stable second phase, the formation of solute atoms enriched in the transition phase of the metastable zone, thereby strengthening the aluminum alloy.
• Grain boundary strengthening: through specific technological means, improve the structure and properties of grain boundaries, improve the strength of grain boundaries, and then enhance the strength of the entire aluminum alloy.
• Composite strengthening: Combining two or more strengthening methods and using their respective advantages to achieve comprehensive strengthening of aluminum alloys.