2 GPa超高强中锰钢中的夹杂物对其高周疲劳性能的影响

李昌鹏, 庞建超, 王子龙, 李云杰, 李琳琳

Effect of Size and Distribution of Inclusions on High-cycle Fatigue Properties of a 2 GPa-graded Ultra-high-strength Medium-Mn Steel

LI Changpeng, PANG Jianchao, WANG Zilong, LI Yunjie, LI Linlin

图6 亚表面夹杂物疲劳开裂断口形貌

Fig.6 Fatigue fracture morphology of subsurface inclusion-induced cracking at different propagation stages (a) macroscopic fracture morphology, (b) microstructural characteristics of crack origin and associated inclusion chemistry, (c) morphology of the crack steady-state propagation zone, (d) morphology of the crack rapid propagation zone