摘要
研究了Al-Mg-Mn和Al-Mg-Mn-Sc-Zr合金冷轧后在不同退火温度下合金的组织和性能的变化。结果表明,与不添加钪和锆的合金相比,复合添加0.4%Sc(质量分数)和Zr能使Al-Mg-Mn合金的再结晶开始温度提高120℃左右。添加微量Sc和Zr合金没有明显再结晶终了温度,在接近熔点时显微组织仍是加工态纤维组织。Sc,Zr复合添加形成的纳米级的二次Al3(Sc,Zr)相质点,对位错和亚晶界有强烈的钉扎作用,再结晶难以形核和长大,从而有效地抑制冷轧后退火过程中的再结晶。
The change of Al-Mg-Mn and Al-Mg-Mn-Sc-Zr alloys' structures and properties after cold-rolling at different annealed temperatures was studied. The results show that adding of 0.4% (Sc+Zr) (mass fraction) can increase the recrystallization temperature by 120°C compared with the alloys without minor Sc and Zr. The alloys with minor Sc and Zr have no obvious ending recrystallization temperature, and the microstructure remain fiber structure even at 550°C. Combined adding of Sc and Zr can form the second A13(Sc, Zr) II particles with nanometer size. Those particles can strongly pin dislocation and subgrain boundaries, which effectively inhibit the recrystallization during annealing by inhibiting the nucleation of recrystallization and the growth of subgrains.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2004年第6期3-6,共4页
Journal of Materials Engineering
基金
国家重点基础研究发展规划项目 (G1 9990 6 491 1 )
预研基金项目 (51 41 2 0 2 0 0 4QT71 )
