Effect of Mo on microstructure and mechanical properties of bulk nanocrystalline Fe3Al materials prepared by aluminothermic reaction

作者：Peiqing La, Xuefeng Lu, Yong Yang, Yinghui Wei, Yanchun Zhao, Can Cheng · 发表于：Materials Science and Technology · 年份：2010 · DOI：10.1179/026708310x12738371693094 · 被引用次数：11 · 研究领域：Intermetallics and Advanced Alloy Properties、Aluminum Alloys Composites Properties、Microstructure and mechanical properties

Bulk nanocrystalline Fe 3 Al based materials with 5, 10 and 15 wt-Mo were prepared by aluminothermic reaction. The microstructure and mechanical properties of the materials were investigated. It was shown that the materials consisted of a nanocrystalline matrix phase that was composed of Fe, Al and Mo and a little Al 2 O 3 contamination phase. The nanocrystalline phase had a disordered bcc crystal structure. Average grain sizes of the nanocrystalline phase of the materials with 5, 10 and 15 wt-Mo were 19, 31 and 24 nm respectively and that of the material with 5 wt-Mo was the smallest. The materials with 10 and 15 wt-Mo exhibited brittle behaviour in compression, whereas the material with 5 wt-Mo had a large plastic deformation. The material with 5 wt-Mo had the highest bending strength and the lowest compressive yield strength.