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测定了机械合金化（ＭＡ）及热静液挤压工艺制备Ａｌ－４．９Ｆｅ－４．９Ｎｉ合金的室温及高温拉伸性能。采用透射电镜观察了４００～５００℃热处理后合金的微观结构。研究结果表明，合金具有较好的高温强度及热稳定性、合金强度和稳定性的改善是由于细小晶粒，以及弥散分布于基体中的Ａｌ＿３（Ｆｅ，Ｎｉ）导致的强化及对晶粒的稳定化作用。经５００℃×２０ｈ热处理后，Ａｌ＿３（Ｆｅ，Ｎｉ）金属间化合物没有明显的粗化。此外，超细晶粒（约０．１５μｍ）使合金产生加工软化，导致变形不均匀性增加，延伸率减少，经热处理后，晶粒长大，加工软化减弱。
The tensile properties at room temperature and high temperature of Al-4.9Fe-4.9Ni alloy prepared by mechanical alloying (MA) and hot hydrostatic extrusion were measured. The microstructure of the alloy after heat treatment at 400-500 ℃ was observed by transmission electron microscopy. The results show that the alloy has good high temperature strength and thermal stability. The improvement of the strength and stability of the alloy is due to the fine grains and the strengthening due to Al 3 (Fe, Ni) dispersed in the matrix, Stabilizing effect. After 500 ℃ × 20h heat treatment, Al_3 (Fe, Ni) intermetallic compound is not obvious coarsening. In addition, the ultra-fine grains (about 0.15μm) make the alloy produce processing and softening, resulting in deformation inhomogeneity increases, the elongation decreases, after heat treatment, the grain growth, processing softening weakened.