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采用多道次搅拌摩擦加工铜粉在Ti6Al4V合金上制备的原位金属间化合物增强复合材料。

In Situ Intermetallics-Reinforced Composite Prepared Using Multi-Pass Friction Stir Processing of Copper Powder on a Ti6Al4V Alloy.

作者信息

Zykova Anna, Vorontsov Andrey, Chumaevskii Andrey, Gurianov Denis, Savchenko Nickolai, Gusarova Anastasija, Kolubaev Evgeny, Tarasov Sergei

机构信息

Institute of Strength Physics and Materials Science, Siberian Branch of Russian Academy of Sciences, 634055 Tomsk, Russia.

出版信息

Materials (Basel). 2022 Mar 25;15(7):2428. doi: 10.3390/ma15072428.

DOI:10.3390/ma15072428
PMID:35407759
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9000171/
Abstract

Multi-pass friction stir processing (FSP) was used to obtain a titanium alloy/copper hybrid composite layer by intermixing copper powder with a Ti6Al4V alloy. A macrostructurally inhomogeneous stir zone was obtained with both its top and middle parts composed of fine dynamically recrystallized α- and β-Ti grains, as well as coarse intermetallic compounds (IMCs) of TiCu and TiCu, respectively. Some β grains experienced β → α decomposition with the formation of acicular α-Ti microstructures either inside the former β-Ti grains or at their grain boundaries. Both types of β → α decomposition were especially clearly manifested in the vicinity of the TiCu grains, i.e., in the copper-lean regions. The middle part of the stir zone additionally contained large dislocation-free β-Ti grains that resulted from static recrystallization. Spinodal decomposition, as well as solid-state amorphization of copper-rich β-Ti grains, were discovered. The FSPed stir zone possessed hardness that was enhanced by 25% as compared to that of the base metal, as well as higher strength, ductility, and wear resistance than those obtained using four-pass FSPed Ti6Al4V.

摘要

采用多道次搅拌摩擦加工（FSP），通过将铜粉与Ti6Al4V合金混合来获得钛合金/铜混合复合层。获得了一个宏观结构不均匀的搅拌区，其顶部和中部由细小的动态再结晶α-Ti和β-Ti晶粒以及分别为TiCu和TiCu的粗大金属间化合物（IMC）组成。一些β晶粒经历了β→α分解，在原β-Ti晶粒内部或其晶界处形成针状α-Ti微观结构。两种类型的β→α分解在TiCu晶粒附近，即在贫铜区域表现得尤为明显。搅拌区中部还包含因静态再结晶而产生的无大位错β-Ti晶粒。发现了富铜β-Ti晶粒的调幅分解以及固态非晶化现象。与母材相比，FSP处理后的搅拌区硬度提高了25%，并且与四通道FSP处理的Ti6Al4V相比，具有更高的强度、延展性和耐磨性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/76d3/9000171/40177714a7f8/materials-15-02428-g020.jpg
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