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采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)等设备,以及拉伸和蠕变试验系统研究微量间隙元素C,B对高铌TiAl合金显微组织与力学性能的影响.微量B元素对高铌TiAl合金没有明显的强化作用,但是微量B元素在合金中以条状或点状的TiB2存在,TiB2细化了高铌TiAl合金原始片层团晶粒,对改善高铌TiAl合金片层组织的室温塑性有利.加微量C元素的高铌TiAl合金在长时间的蠕变过程中,大量Ti3AlC沉淀相的析出提高了高铌TiAl合金全片层组织蠕变抗力.

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