Wachowski Marcin, Kosturek Robert, Śnieżek Lucjan, Mróz Sebastian, Stefanik Andrzej, Szota Piotr
Faculty of Mechanical Engineering, Military University of Technology, 00-908 Warsaw, Poland.
Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, 42-201 Częstochowa, Poland.
Materials (Basel). 2020 Apr 19;13(8):1930. doi: 10.3390/ma13081930.
The paper describes an investigation of an explosively welded Mg/Al/Ti multilayer composite. Following the welding, the composite was subjected to hot-rolling in three different temperatures: 300 °C, 350 °C and 400 °C, with a total relative strain of 30%. The rolling speed was 0.2 m/s. The investigation of the composite properties involves microhardness analysis and mini-specimen tensile tests of the joints. The composite Mg/Al and Al/Ti bonds in the as-welded state and after rolling in 400 °C were subjected to microstructure analysis using scanning electron (SEM) and transmission electron microscopy (TEM). In the Al/Ti interface, the presence of melted zones with localized intermetallic precipitates has been reported in the as-welded state, and it has been stated that hot-rolling results in precipitation of intermetallic particles from the melted zone. The application of the hot-rolling process causes the formation of a continuous layer in the Mg/Al joint, consisting of two intermetallic phases, MgAl (β) and MgAl (γ).
本文描述了对爆炸焊接的镁/铝/钛多层复合材料的一项研究。焊接后，该复合材料在三种不同温度下进行热轧：300℃、350℃和400℃，总相对应变为30%。轧制速度为0.2m/s。对复合材料性能的研究包括对接头进行显微硬度分析和小型试样拉伸试验。对镁/铝和铝/钛焊接态及在400℃轧制后的复合材料结合处进行了扫描电子显微镜（SEM）和透射电子显微镜（TEM）微观结构分析。在铝/钛界面，已报道在焊接态存在带有局部金属间化合物析出物的熔化区，并且有人指出热轧会导致熔化区析出金属间化合物颗粒。热轧工艺的应用导致在镁/铝结合处形成一个连续层，该连续层由两个金属间相，即MgAl（β）和MgAl（γ）组成。
