摘要
研究了Zr对Al-Zn-Mg-Cu系超高强铝合金力学性能和显微组织的影响 结果表明,合金的强度随着Zr含量的增加而提高,含Zr量为0.06％（质量分数）时延伸率出现峰值.添加Zr可抑制合金的再结晶,使合金组织细化,并使该合金的断裂机制由沿晶断裂转变为穿晶断裂.对于所研究的超高强度铝合金,Zr的最佳添加量为006％～0.14％.
The influence of the content of zirconium on mechanical properties and microstructure of a type of super-high strength Al-Zn-Mg-Cu alloy was studied in this paper. The result shows that the strength of the alloys increases with the content of zirconium. The elongation reaches to a peak and the strength has a sharp increase accordingly when content of Zr in the alloy is 0.06% (mass fraction). Zirconium can significantly retard the recrystallization and refine the microstructure of the alloys. Moreover, the fracture mechanism of the alloys is converted from intergranular brittle to transgranular ductile model with the change of the content of zirconium. The optimum content of Zr is between 0.06%-0.14% for the super-high strength Al-Zn-Mg-Cu.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2002年第4期406-412,共7页
Chinese Journal of Materials Research
基金
国家重点基础研究发展规划项目(973)资助G1999064907
关键词
超高强度铝合金
力学性能
显微组织
断裂
锆
Fracture
Mechanical properties
Microstructure
Recrystallization (metallurgy)
Zirconium
