Heat-treatment and mechanical properties of cold-sprayed high strength Al alloys from satellited feedstocks
Heat-treatment and mechanical properties of cold-sprayed high strength Al alloys from satellited feedstocks
复制标题
DOI：
10.1016/j.surfcoat.2019.05.043
复制
发表时间：
2019-09-25
影响因子：
5.4
通讯作者：
Clare, Adam T.
中科院分区：
文献类型：
--
作者：
Al-Hamdani, Kamaal S.;Murray, James W.;Clare, Adam T.
在以前的工作中，作者展示了一种通过卫星技术通过冷喷涂在纯铝基中生成含有TiC颗粒的复合涂层的方法。本文研究了“卫星”技术对冷喷涂A6061-TiC涂层沉积和性能的影响。结果表明，利用卫星原料得到的卫星粉末的沉积效率和孔隙率都有明显的提高。为了进一步提高涂层的致密性和耐磨性，对涂层进行了退火热处理。热处理后涂层的片层孔隙率降低了70%左右。在5N的钢质对偶体上进行的干滑动磨损试验表明，与使用纯6061和混合6061-TiC制备的涂层相比，使用带有TiC的卫星喂料的涂层比磨损率分别降低了55%和20%。与6061和混合6061-TiC涂层相比，热处理后的涂层比6061和6061-TiC涂层进一步降低了70%和40%，具有良好的重复性。
In prior work, the authors demonstrated a method for the creation of composite coatings containing TiC particles in a pure Al matrix by cold spray via a satelliting technique. Here, the authors investigate the effects of using the 'Satelliting' technique on the deposition and characteristics of A6061-TiC coatings fabricated by cold-spray. The results showed clear improvements in the deposition efficiency and porosity of the satellited powder obtained by using the satellited feedstock. Annealing heat-treatment was then applied for further enhancement of the coating's density and wear properties. The heat-treated coating exhibited a similar to 70% reduction in interlamellar porosity. Dry sliding wear testing using a steel counter body at 5 N showed that using a satellited feedstock with TiC yielded a 55% and 20% reduction in coating specific wear rate in comparison to coatings made using pure 6061 and blended 6061-TiC, respectively. This was further reduced by similar to 70% and similar to 40% in comparison to the 6061 and blended 6061-TiC coating after heat-treatment with good repeatability.