700℃热暴露对 β 凝固 γ-TiAl合金表面组织及形貌的影响

刘仁慈, 王鹏, 曹如心, 倪明杰, 刘冬, 崔玉友, 杨锐

Influence of Thermal Exposure at 700oC on the Microstructure and Morphology in the Surface of β-Solidifying γ-TiAl Alloys

LIU Renci, WANG Peng, CAO Ruxin, NI Mingjie, LIU Dong, CUI Yuyou, YANG Rui

表2 TNM-0.5B合金铸件初始组织组成相EDS结果 (mass fraction / %)

Table 2 Chemical composition of different phases in the initial microstructure of TNM-0.5B alloy in Fig.1b

Position Specific constitute Al Ti Nb Mo B 1 Equiaxed β0 20.64 60.96 11.86 6.54 0 2 Equiaxed γ 31.20 56.00 11.10 1.70 0 3 α2 + γ lamellar 27.55 59.54 9.96 2.95 0 4 Boride 8.06 43.91 13.98 3.17 30.88