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本文研究了Mo,Si,B和化学计量成分对Fe_3Al和FeAl合金室温和高温拉伸性能以及组织结构的影响,结果表明,三种合金元素都使两种铁铝化物得到明显强化,但Mo和Si使其严重变脆,硼使FeAl增加塑性,断口由沿晶型变为穿晶准解理型。富Al的Fe_3Al和富Fe的FeAl合金室温塑性较化学计量化合物有明显提高。Fe_3Al从400—550℃,FeAl从400—500℃出现反常温度关系,用组织结构方面的结果对此进行了讨论。
The effects of Mo, Si, B and stoichiometric compositions on the tensile properties and microstructure of Fe 3 Al and FeAl alloys at room temperature and elevated temperature were studied. The results showed that both Al 2 O 3 and Al 2 O 3 significantly enhanced the properties of both Fe and Al aluminides. However, Si makes it a serious brittle, boron to increase the plasticity of FeAl, fracture by the crystal into a transcrystalline quasi-cleavage type. The room-temperature plasticity of Al-rich Fe 3 Al and Fe-rich FeAl alloys is obviously higher than that of stoichiometric compounds. Fe_3Al from 400-550 ℃, FeAl from 400-500 ℃ anomalous temperature relationship, with the organizational structure of the results of this discussion.