Superior tensile properties of in situ nano-sized TiCp/Al-Cu composites fabricated by reaction in melt method
Superior tensile properties of in situ nano-sized TiCp/Al-Cu composites fabricated by reaction in melt method
复制标题
熔融法反应制备原位纳米 TiCp/Al-Cu 复合材料的优异拉伸性能
DOI：
10.1016/j.msea.2016.02.015
复制
发表时间：
2016-03-21
期刊：
影响因子：
6.4
通讯作者：
Jiang, Qi-Chuan
中科院分区：
文献类型：
--
作者：
Tian, Wei-Si;Zhou, Dong-Shuai;Jiang, Qi-Chuan
采用AI-Ti-CNT中间合金在熔融铝合金中自蔓延高温合成（SHS）反应制备了纳米TiCp/Al-Cu复合材料。纳米TiC颗粒的加入使合金的抗拉强度和塑性同时得到提高。与未增强Al-Cu合金（303 MPa、485 MPa和6.6%）相比，0.3 wt%纳米TiC颗粒增强Al-Cu基复合材料的屈服强度、极限抗拉强度和断裂应变分别提高了15.5%、14.2%和123.5%，达到350 MPa、554 MPa和14.75%。力学性能的增强主要是由于α - al枝晶的细化、大量的较小θ′析出和分散的纳米级TiC颗粒。本研究为制备具有优异强度和延展性的纳米TiCp/Al-Cu复合材料提供了一种可行的方法。(C) 2016 Elsevier B.V.版权所有
The nano-sized TiCp/Al-Cu composites were fabricated using the self-propagating high-temperature synthesis (SHS) reaction of AI-Ti-CNT master alloys in molten aluminum alloys. The tensile strength and ductility of the alloys were simultaneously improved by the addition of nano-sized TiC particles. The yield strength, ultimate tensile strength and fracture strain of the 0.3 wt% nano-sized TiC particles reinforced Al-Cu matrix composite increased to 350 MPa, 554 MPa and 14.75%, improved by 15.5%, 14.2% and 123.5%, respectively, compared with the unreinforced Al-Cu alloy (303 MPa, 485 MPa and 6.6%). The enhanced mechanical properties are attributed to the refined alpha-Al dendrites, a larger amount of smaller theta' precipitates and the dispersed nano-sized TiC particulates. This study provides a feasible method to fabricate the nano-sized TiCp/Al-Cu composites with superior strength and ductility. (C) 2016 Elsevier B.V. All rights reserved.