Effect of Zr content on the precipitation and dynamic softening behavior in Al-Fe-Zr alloys
Effect of Zr content on the precipitation and dynamic softening behavior in Al-Fe-Zr alloys
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Zr含量对Al-Fe-Zr合金析出和动态软化行为的影响
DOI：
10.1016/j.matchar.2020.110181
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发表时间：
2020-04-01
影响因子：
4.7
通讯作者：
Yin, Anmin
中科院分区：
文献类型：
--
作者：
Ye, Jieyun;Guan, Renguo;Yin, Anmin
本文利用透射电子显微镜（TEM）、电子背散射衍射（EBSD）研究了Al-Fe-Zr合金的析出和动态软化行为，并利用JmatPro软件研究了析出热力学。结果表明，Al3Zr析出相的优化温度为350℃，蝶形Al3Zr和棒状Al3Fe的分数在350℃附近达到峰值。随着Zr含量的增加，Al3Zr的分数增加，但其尺寸和形貌几乎没有变化。 Al3Fe 的分数和形貌随 Zr 含量变化较小。挤压过程中发生动态回复和动态再结晶。铝基体中的两种析出粒子钉扎位错，有效抑制动态再结晶。随着Zr含量从0.1wt%增加到0.4wt%，抑制作用更强，再结晶晶粒分数从44.2%下降到86.9%。由于动态再结晶抑制，动态回复成为主要的软化机制。
In this paper, the precipitation and dynamic softening behavior of Al-Fe-Zr alloys were investigated by transmission electron microscopy (TEM), electron back scattering diffraction (EBSD), and the precipitation thermodynamics was studied by JmatPro software. Results show that the optimizing temperature of Al3Zr precipitates was 350 degrees C and the fraction of butterfly-shaped Al3Zr and rod-shaped Al3Fe reached a peak at similar to 350 degrees C. With the increase of Zr content, the fraction of Al3Zr increased, whereas its size and morphology had almost no change. The fraction and morphology of Al3Fe showed less variation with Zr content. Dynamic recovery and dynamic recrystallization occurred during extrusion. The two kinds of precipitation particles in aluminum matrix pinned the dislocations and inhibited dynamic recrystallization effectively. As the Zr content went up from 0.1 to 0.4 wt %, the inhibition got stronger and the fraction of recrystallized grains decreased from 44.2% to 86.9%. As a consequence of the dynamic recrystallization suppression, dynamic recovery became the major softening mechanism.