A study has been conducted to determine the cyclic and static thermal stability fo Ti-44Al-11Nb alloy in air in a range of temperature from 900 to 1000 degree. Weight gain method shows that the static oxidation rates are higher than cyclic oxidation rates under identical experimental conditions at a given temperature. The oxide layer at the surface peretrates the base metal in a direction parallel to the lamellae of the two phases, alft sub 2 and lambda, confirmed by scanning electron micrographs. THe thermal stability fo up to 168 hours indicates that there are phase transformatios taking placed afecting the microstructures in such a way that large amount of dislocation activities are involved.
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机译：已经进行了研究以确定Ti-44Al-11Nb合金在900至1000度温度范围内的空气中的循环和静态热稳定性。重量增加法表明，在给定温度下，在相同的实验条件下，静态氧化速率高于循环氧化速率。表面的氧化物层在平行于两个相的薄片Alft sub 2和λ的方向上渗透了贱金属，通过扫描电子显微照片证实。高达168小时的热稳定性表明，发生了相变，影响了微结构，从而涉及大量的位错活动。
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