期刊
MATERIALS CHARACTERIZATION
卷 177, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2021.111204
关键词
Spark plasma sintering; MAX phase; Plastic deformation; Metal matrix composites
类别
资金
- China Postdoctoral Science Foundation [2018M631926 2019T120263]
- Heilongjiang Postdoctoral Science Foundation [LBHZ18079]
- Fundamental Research Funds for the Central Universities
- NSRIF [.2019001]
Ti2AlC/Al composites with 20 vol% Ti2AlC particles were fabricated using spark plasma sintering and hot extrusion, showing high tensile ductility at 590°C sintering temperature due to the good interfacial bonding and uniform strain distribution. The ability of Ti2AlC layered structure to kink and delaminate also contributes to the high plasticity.
The 20 vol% Ti2AlC particles reinforced Al composites were fabricated using spark plasma sintering technique followed by hot extrusion. The relationship between microstructure, phase composition and mechanical properties of composites at different sintering temperatures was investigated in order to achieve high plasticity. The Al matrix composite sintered at 590 degrees C with 20 vol% Ti2AlC particles demonstrates a large tensile ductility, with a uniform strain of 14.8%. The fracture morphology characterizes the kink and delamination ability of Ti2AlC particles and good interfacial bonding between Al matrix and Ti2AlC reinforcement. Furthermore, a combination of in-situ tensile test and digital image correlation (DIC) reveal that the process of uniform strain evolution plays an important role in high elongation. The high plasticity of Ti2AlC/Al composites are attributed to good interfacial bonding and microstructure obtained by SPS method, the ability of layered structure of Ti2AlC to kink and delaminate, and the uniform strain distribution in the multi-regions of Ti2AlC particles wrapped in Al matrix.
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