K439B铸造高温合金800℃长期时效组织与性能演变

张雷雷, 陈晶阳, 汤鑫, 肖程波, 张明军, 杨卿

Evolution of Microstructures and Mechanical Properties of K439B Superalloy During Long-Term Aging at 800oC

ZHANG Leilei, CHEN Jingyang, TANG Xin, XIAO Chengbo, ZHANG Mingjun, YANG Qing

图6 热处理态K439B合金的碳化物形貌

Fig.6 Carbide in the heat-treated K439B alloy (a) MC carbide distributed in the interdendritic region (b) HRTEM image from the edge of the MC carbide (marked with an arrow in Fig.6a) and the atomic-scale HRTEM images from the regions 1# and 2# with corresponding fast Fourier transform (FFT) patterns (insets) (c, d) MC carbide (c) and M23C6 carbide (d) at the grain boundary with corresponding SAED patterns (insets)