期刊
MATERIALS
卷 13, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/ma13081930
关键词
explosive welding; light alloys; hot rolling; composite; microstructure; intermetallic
类别
资金
- Polish Ministry of National Defence [PBG/13-998]
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 degrees C, 350 degrees C and 400 degrees 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 degrees 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, Mg2Al3 (beta) and Mg17Al12 (gamma).
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