摘要
研究了Mg-6Zn-0.5Zr-0.5Ce镁合金的显微结构和热变形行为,并构建了该合金的热加工图。结果表明,铸态和退火态Mg-6Zn-0.5Zr-0.5Ce镁合金主要由α-Mg基体和分布在晶界和晶粒内部的第二相构成。随着真应变的不断变大,流变应力先变大后下降,并逐渐趋于平稳。加工失稳区位于ε=0.1～1.0 s-1,T=523～573 K区域,ε=1.0 s-1,T=673 K,η=44%是Mg-6Zn-0.5Zr-0.5Ce镁合金最佳的加工条件。
The microstructures and thermal deformation behavior of the magnesium alloy Mg-6Zn-0.5Zx-0.5Ce were investigated, and the thermal processing map of the alloy was established. The results show that the alloys Mg-6Zn-0.5Zr- 0.5Cewith both as-cast and annealed states are made of the matrix α-Mg and the second phase distributing at grain boundary and inner grain. The flow stress increases first and then decreases and tends to stable gradually with the increase of the true strain. The processing instability zone is the scale of ε=0.1-1.0 s^-1 and T=-523-573 K. The optimal processing condition is ε=1.0 s^-1, 7=-673 K and η=44%.
出处
《铸造技术》
CAS
北大核心
2014年第12期2780-2782,共3页
Foundry Technology
