Al-Zn-Mg-Cu合金多尺度第二相粒子与性能关系研究

Research Progress of Relationship Between Multi-scale Second Phase Particles and Properties of Al-Zn-Mg-Cu Alloys

介绍了Al-Zn-Mg-Cu合金多尺度第二相粒子与性能关系的研究。涉及的多尺度第二相粒子包括微米尺度的金属间化合物、亚微米尺度的弥散相、纳米尺度的晶内析出相和晶界析出相;涉及的相关性能为强度、断裂韧性以及腐蚀性能。结合相关文献与作者的研究工作,可以得出以下结论:金属间化合物会影响合金的断裂韧性和腐蚀抗力;弥散相通过抑制基体再结晶的方式影响合金的强度、断裂韧性以及腐蚀抗力;晶界析出相会影响合金的断裂韧性和腐蚀抗力;晶内析出相影响合金的强度和断裂韧性。

The relationship between multi-scale second phase particles and properties of Al-Zn-Mg-Cu alloys was reviewed by related literatures and works.Multi-scale second phase particles contain micro-scale intermetallic particles,submicro-scale dispersoid,nano-scale intergranular precipitates and nano-scale intragranular precipitates.The related properties mainly refer to strength,fracture toughness and corrosion resistance.It is concluded that in Al-Zn-Mg-Cu alloys,the intermetallic particles dominate the fracture toughness and corrosion resistance,the dispersoid dominates the strength,fracture toughness and corrosion resistance via inhibiting the recrystallization of matrix,the intergranular precipitates dominate the fracture toughness and corrosion resistance,whereas the intragranular precipitates dominate the strength and fracture toughness.Furthermore,the development of techniques to manipulate multi-scale second phase was reviewed.So the possible causes and feasible technologies to synergistically improve the properties of Al-Zn-Mg-Cu alloys were pointed out,which is of great guiding significance.