(北京航空材料研究院 二室， 北京 100095)
摘 要: 研究了高強鋁合金的力學性能與Zr含量的關系， 計算了合金的各種強化因素值。研究發(fā)現(xiàn)： 合金的抗拉強度σb和屈服強度σ0.2均隨Zr含量的增加而增大， 增幅分別達到11.8%和12.6%； 合金延伸率δ在Zr添加量不高時隨Zr含量的增加而增大， 在Zr含量為0.06%時出現(xiàn)峰值， 隨后合金延伸率/δ/逐漸穩(wěn)定在8%左右。 結(jié)合合金顯微特征， 合金強化機理主要包括晶粒細化、 顆粒彌散強化及形變強化， 在Zr含量為0.16%的合金中相應的強化值分別為21, 35和14MPa。
關鍵字: 鋯； 高強鋁合金；力學性能； 強化機理
（The second department, Beijing Institute of Aeronautical Materials,
Beijing 100095, China）
Abstract:The relationship between Zr content and mechanical properties of high strength aluminum alloys was examined, and the strengthening values of several factors were calculated. The values of σb and σ0.2 are improved with increasing of Zr content, and the improving amplitude reach to 11.8% and 12.6% respectively. The elongation δ increases with increasing Zr content while Zr content is low, and reaches a peak at 0.06%Zr, then gradually stabilizes at about 8% Zr. Combined with microstructure of alloys, strengthening mechanism are mainly grain-refine, particles dispersion strengthening and improvement of deformation strengthening. The strengthening values of 0.16%Zr alloy is 21, 35, and 14MPa, respectively.
Key words: zirconium; high strength aluminum alloys; mechanical properties; strengthening mechanism
