2024-11-12
• Processing strengthening: in the process of plastic deformation, increase the dislocation density of the alloy, so that the dislocation cross winding, enhance the resistance of dislocation movement, so as to improve the strength of the alloy. However, it will reduce the shaping, and the shape and size will change, which is not applicable to profiles with dimensional accuracy requirements.
• Solid solution strengthening: adding alloying elements to pure aluminum to form an aluminum-based solid solution, resulting in lattice distortion, hindering dislocation movement, and improving the strength of the aluminum-based solid solution. The greater the degree of lattice distortion, the more obvious the effect of solid solution strengthening.
• Aging strengthened aluminum alloy is heated to a certain temperature after quenching to obtain supersaturated aluminum-based solid solution, and then the supersaturated aluminum-based solid solution is placed at room temperature or heated to a certain temperature, so that its strength and hardness increase with time, but plasticity and toughness decrease.
• Over-phase strengthening: when the alloy element exceeds the limit solubility, the second phase (excess phase) that cannot be dissolved in the solid solution will appear in the heating solution treatment, hindering the dislocation in the alloy