Al-Zn-Mg-Cu合金多尺度第二相粒子与性能关系研究-综述

Understanding the relationship between multi-scale second phase particles and properties of Al-Zn-Mg-Cu alloys: A review

摘要:

本文综述了Al-Zn-Mg-Cu合金多尺度第二相粒子与性能关系研究。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；涉及的相关性能主要指强度、断裂韧性以及腐蚀性能。通过回顾相关文献,结合作者所在课题组所做工作,可以得出以下结论：金属间化合物主导了合金的断裂韧性和腐蚀抗力；弥散相通过抑制基体再结晶方式,主导合金的强度、断裂韧性以及腐蚀抗力；晶界析出相主导合金的断裂韧性和腐蚀抗力；晶内析出相主导合金的强度和断裂韧性。

Abstract:

The review summarized the relationship between multi-scale second phase particles and properties of Al-Zn-Mg-Cu alloys by reviewing related literatures and works done by authors’ group. Multi-scale second phase particles contain micro-scale intermetallic particles, submicro-scale dispersoids, nano-scale inter-granular precipitates and nano-scale intra-granular precipitates. The related properties mainly refer to strength, fracture toughness and corrosion resistance. it is concluded that, in Al-Zn-Mg-Cu alloys, intermetallic particles dominate fracture toughness and corrosion resistance, the dispersoids dominate strength, fracture toughness and corrosion resistance via inhibiting the recrystallization of the matrix, the inter-granular precipitates dominate fracture toughness and corrosion resistance, whereas the intra-granular precipitates dominate strength and fracture toughness. Furthermore, the development of technologies to manipulate multi-scale second phase was reviewed. The aim for the review is to help technical personnel to analyse the possible causes and develop the feasible technologies to synergistically improve the properties of Al-Zn-Mg-Cu alloys.