Effects of homogenization on precipitation of Al3(Er,Zr) particles and recrystallization behavior in a new type Al-Zn-Mg-Er-Zr alloy
Effects of homogenization on precipitation of Al3(Er,Zr) particles and recrystallization behavior in a new type Al-Zn-Mg-Er-Zr alloy
复制标题
均匀化对新型Al-Zn-Mg-Er-Zr合金中Al-3(Er,Zr)颗粒析出及再结晶行为的影响
DOI：
10.1016/j.msea.2017.02.071
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发表时间：
2017-03-24
期刊：
影响因子：
6.4
通讯作者：
Nie, Z. R.
中科院分区：
文献类型：
--
作者：
Wu, H.;Wen, S. P.;Nie, Z. R.
研究了均匀化处理对新型Al-Zn-Mg-Er-Zr合金中Al-3（Er，Zr）相析出行为及其对再结晶抗力的影响。进行了常规一级均匀化、双级均匀化和斜坡加热均匀化四种不同的均匀化处理。与常规一级均匀化处理相比，其它3种均匀化处理均能获得更细的Al-3（Er，Zr）颗粒，并提高其数密度和体积分数。此外，双级均匀化和斜坡加热均匀化均能改善Al-3（Er，Zr）颗粒的分布，减小晶界附近无沉淀区的宽度，对Al-Zn-Mg-Er-Zr合金具有不可忽视的强化作用。Al-3（Er，Zr）颗粒析出行为的不同导致了其再结晶抗力的不同。Al-Zn-MgEr-Zr合金具有较高的再结晶抗力是由于Al-3（Er，Zr）颗粒具有较大的fv/r比，从而产生较大的Zener阻力，有效地抵抗了热变形及后续热加工过程中的再结晶。因此，在相同的退火时间下，双级均匀化和斜坡加热均匀化的样品可以达到一个显着较低的再结晶分数相比，传统的一级均匀化的样品。
The effects of homogenization treatments on the precipitation behavior of Al-3(Er,Zr) particles and theirs effects on recrystallization resistance in a new type Al-Zn-Mg-Er-Zr alloy have been investigated. Four different homogenization treatments, conventional one-stage homogenization, double-stage homogenization and ramp heating homogenization are carried out. Compared with that in the conventional one-stage homogenization, a finer particle size, higher number density and volume fraction of Al-3(Er,Zr) particles can be obtained in other three homogenization treatments. In addition, the double-stage homogenization and the ramp heating homogenization can improve the Al-3(Er,Zr) particles distribution and minimize the width of precipitation free zone in the region near the grain boundary, and provide an additional but nonnegligible strengthening effect for the Al-Zn-Mg-Er-Zr alloy. The difference in precipitation behavior of Al-3(Er,Zr) particles lead to different recrystallization resistance. The high recrystallization resistance can be attributed to the larger fv/r ratio of Al-3(Er,Zr) particles, which resulting in a higher Zener drag to effectively resist the recrystallization in Al-Zn-MgEr-Zr alloy during hot deformation and the subsequent thermal processing. Therefore, under the same annealing time, the double-stage homogenized and the ramp heating homogenized samples can achieve a significant lower recrystallized fraction compared with the conventional one-stage homogenized samples.