Chumaevskii Andrey, Zykova Anna, Sudarikov Alexandr, Knyazhev Evgeny, Savchenko Nickolai, Gubanov Alexander, Moskvichev Evgeny, Gurianov Denis, Nikolaeva Aleksandra, Vorontsov Andrey, Kolubaev Evgeny, Tarasov Sergei
Institute of Strength Physics and Materials Science, Siberian Branch of Russian Academy of Sciences, 634055 Tomsk, Russia.
Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia.
Materials (Basel). 2023 Jan 14;16(2):817. doi: 10.3390/ma16020817.
In the presented work, the effect of friction stir processing admixing the zirconium tungstate ZrWO powder on the microstructure, mechanical and tribological properties of the AA5056 Al-Mg alloy stir zone has been studied. The FSP resulted in obtaining dense composite stir zones where α-ZrWO underwent the following changes: (i) high-temperature transformation into metastable β'-ZrWO and (ii) decomposition into WO and ZrO oxides followed by the formation of intermetallic compounds WAl and ZrA. These precipitates served as reinforcing phases to improve mechanical and tribological characteristics of the obtained fine-grained composites. The reduced values of wear rate and friction coefficient are due to the combined action the Hall-Petch mechanism and reinforcement by the decomposition products, including AlO, ZrO, β'-ZrWO and intermetallic compounds such as WAl and ZrAl. Potential applications of the above-discussed composites maybe related to their improved tribological characteristics, for example in aerospace and vehicle-building industries.
在本研究工作中，对搅拌摩擦加工掺混钨酸锆（ZrWO）粉末对AA5056铝镁合金搅拌区的微观结构、力学性能和摩擦学性能的影响进行了研究。搅拌摩擦加工导致获得致密的复合搅拌区，其中α-ZrWO发生了以下变化：（i）高温转变为亚稳β'-ZrWO，以及（ii）分解为WO和ZrO氧化物，随后形成金属间化合物WAl和ZrA。这些析出物作为增强相，改善了所得细晶复合材料的力学和摩擦学特性。磨损率和摩擦系数的降低值归因于霍尔-佩奇机制和分解产物（包括AlO、ZrO、β'-ZrWO以及金属间化合物如WAl和ZrAl）的强化作用的共同作用。上述复合材料的潜在应用可能与其改善的摩擦学特性有关，例如在航空航天和汽车制造行业。
