选区激光熔化 γ' 相强化镍基高温合金裂纹形成机理与抗裂纹设计研究进展

祝国梁, 孔德成, 周文哲, 贺戬, 董安平, 疏达, 孙宝德

Research Progress on the Crack Formation Mechanism and Cracking-Free Design of γ' Phase Strengthened Nickel-Based Superalloys Fabricated by Selective Laser Melting

ZHU Guoliang, KONG Decheng, ZHOU Wenzhe, HE Jian, DONG Anping, SHU Da, SUN Baode

图8 不同厚度样品基板预热前后底部开裂情况[60]，基板预热温度对高强镍基高温合金裂纹密度及残余应力的影响规律[51]

Fig.8 Bottom cracking of samples with different sample heights (h) before and after preheating (a)[60], effect of substrate preheating temperature on crack density and residual stress of high-strength nickel-based superalloy (b)[51]