3D characterization of ultrasonic melt processing on the microstructural refinement of Al-Cu alloys using synchrotron X-ray tomography
3D characterization of ultrasonic melt processing on the microstructural refinement of Al-Cu alloys using synchrotron X-ray tomography
复制标题
使用同步加速器 X 射线断层扫描技术对 Al-Cu 合金微观结构细化的超声波熔体加工进行 3D 表征
DOI：
10.1016/j.matchar.2019.04.040
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发表时间：
2019
影响因子：
4.7
通讯作者：
Zhang Weiwen
中科院分区：
文献类型：
--
作者：
Zhao Yuliang;Song Dongfu;Lin Bo;Zhang Chun;Zheng Donghai;Inguva Saikumar;Li Tao;Sun Zhenzhong;Wang Zhi;Zhang Weiwen
The effect of ultrasonic melt processing (USP) on the three-dimensional (3D) architecture of intermetallic phases and pores in two multicomponent cast Al–5.0Cu–0.6Mn–0.5(1.0) Fe alloys is characterized using conventional microscopy and synchrotron X-ray microtomography. The two alloys are found to contain intermetallic phases, such as α-Al15(FeMn)3Cu2, β-Al7Cu2Fe, Al3(FeMn), Al6(FeMn), and Al2Cu, that have complex networked morphology in 3D. The refined and equiaxed microstructures can be obtained by the application of USP. The results show that USP effectively reduce the volume fraction, interconnectivity, and equivalent diameter of the intermetallic phases in both alloys. The grain sizes of 0.5Fe and 1.0Fe alloys are decreased from 16.9 μm and 15.8 μm without USP to 13.3 μm and 12.2 μm with USP, respectively. USP can effectively reduce the volume fraction of pores in both alloys due to the ultrasonic degassing effect. The main refinement mechanisms are fragmentation of primary and secondary dendrites induced by acoustic bubbles and acoustic streaming flow.
