On the preparation and mechanical properties of in situ small-sized TiB2/Al-4.5Cu composites via ultrasound assisted RD method
On the preparation and mechanical properties of in situ small-sized TiB2/Al-4.5Cu composites via ultrasound assisted RD method
复制标题
超声辅助RD法原位小尺寸TiB2/Al-4.5Cu复合材料的制备及其力学性能
DOI：
10.1016/j.jallcom.2018.06.303
复制
发表时间：
2018-10-15
影响因子：
6.2
通讯作者：
Han, Qingyou
中科院分区：
文献类型：
--
作者：
Liu, Jun;Liu, Zhiwei;Han, Qingyou
采用超声辅助重熔稀释法制备了高强度、高塑性的原位小尺寸TiB 2/Al-4.5Cu复合材料。实验结果表明，在金属盐反应过程中合成了平均粒径为100 nm的小尺寸TiB 2颗粒。在超声作用下，获得了组织均匀的Al-TiB 2复合材料和TiB 2/Al-4.5Cu复合材料。TiB 2颗粒的加入使Al-4.5Cu合金中的α-Al晶粒由大尺寸的枝晶转变为小尺寸的球形。与原始Al-4.5Cu合金相比，5wt%TiB2/Al-4.5Cu复合材料具有最佳的综合力学性能，屈服强度、抗拉强度和伸长率分别提高了39.7%、39.9%和7.9%。此外，还对复合材料的强度和塑性等力学性能提高的机理进行了探讨。(C)2018爱思唯尔B. V.保留所有权利。
In situ small-sized TiB2/Al-4.5Cu composites with high strength and good ductility were prepared via an ultrasound assisted re-melting and diluting (RD) approach in this research. The experimental results showed that small-sized TiB2 particles with an average size of 100 nm were synthesized in the metal-salts reaction. Both the Al-TiB2 mater composite and TiB2/Al-4.5Cu composites with homogeneous microstructures were obtained due to the effects of ultrasound. The alpha-Al grains in Al-4.5Cu alloy transferred from large-sized dendrite to small-sized spherical in morphology by adding the TiB2 particles. Compared with the original Al-4.5Cu alloy, the 5 wt% TiB2/Al-4.5Cu composites exhibited the best comprehensive mechanical properties, and the yield strength, ultimate tensile strength and elongation were improved by 39.7%, 39.9%, and 7.9%, respectively. Furthermore, the mechanisms of the improved mechanical properties, including the strength and ductility, of the composites were discussed. (C) 2018 Elsevier B.V. All rights reserved.