镍基高温合金疲劳裂纹急速扩展敏感温度及成因

江河, 佴启亮, 徐超, 赵晓, 姚志浩, 董建新

Sensitive Temperature and Reason of Rapid Fatigue Crack Propagation in Nickel-Based Superalloy

JIANG He, NAI Qiliang, XU Chao, ZHAO Xiao, YAO Zhihao, DONG Jianxin

图2 温度对粉末高温合金疲劳裂纹扩展行为的影响

Fig.2 Effects of temperature on fatigue propagation behavior of FGH4096 (a, b), FGH4097 (c, d), and FGH4098 (e, f) powder metallurgy superalloys (a, c, e) da / dN-ΔK curves (da / dN—fatigue crack growth rate, ΔK—stress intensity factor range) (b, d, f) fatigue crack growth lifetime (N) vs temperature