γ-TiAl合金在700 ℃空气中的长时高温氧化行为和组织演变

周志春, 刘仁慈, 张建达, 杨超, 崔玉友, 杨锐

Long-Term Oxidation Behavior and Microstructural Evolution of γ-TiAl Alloys at 700 oC in Air

ZHOU Zhichun, LIU Renci, ZHANG Jianda, YANG Chao, CUI Yuyou, YANG Rui

表2 45XD和4822合金样品表面氧化产物化学成分分析 (atomic fraction / %)

Table 2 Chemical composition of oxides on the surface of 45XD and 4822 alloy specimens

Alloy Position O Al Ti Nb Mn Cr 45XD 1 53.95 21.11 23.82 0.71 0.41 - 2 64.53 16.86 17.90 0.37 0.34 - 3 68.28 14.62 16.65 0.28 0.17 - 4822 4 56.80 19.25 22.30 0.85 - 0.80 5 69.61 0.42 29.75 0.19 - 0.03 6 58.88 22.70 17.61 0.45 - 0.36 7 72.72 0.40 26.68 0.16 - 0.04