Study on high-cycle fatigue behavior of laser-cladding Stellite6 on 17-4PH stainless steel

被引：0

作者：

Zhao, Wenyu ^{[1
]}

Lu, Fenggui ^{[1
]}

Li, Zhuguo ^{[1
]}

Wang, Dong ^{[1
]}

Wang, Xiaojuan ^{[2
]}

Liu, Xia ^{[2
]}

Yang, Renjie ^{[3
]}

机构：

[1] Shanghai Key Laboratory of Material Laser Processing and Modification, Shanghai Jiao Tong University, Shanghai

[2] Shanghai Turbine Plant, Shanghai Electric Power Generation Equipment Co., Ltd., Shanghai

[3] Shanghai Turbine Company, Ltd., Shanghai

来源：

Zhao, Wenyu | 1600年 / Science Press卷 / 41期

关键词：

Erosion-resistant coating; Fatigue fracture surface; High-cycle fatigue life; Laser cladding; Optical fabrication;

D O I：

10.3788/CJL201441.1003014

中图分类号：

学科分类号：

摘要：

Stellite6 coating is cladded on the 17-4PH stainless steel using a diode laser. Fatigue behaviors of substrate specimens, as-cladded specimens and the cladded specimens with heat treatment (550 ℃ for 6 h) are tested with the tension and compression loading method. The fracture surface is characterized by scanning electron microscopy (SEM). The results show that the fatigue strength with 107 cycles of substrate specimens is 470 MPa which is higher than that of the as-cladded specimens with 380 MPa, while the fatigue strength of cladded specimens with heat treatment can reach to 440 MPa. The fatigue surface of substrate specimen shows that the fatigue crack initiates at the surface or inner defects, then propagates forward with the parallel fatigue striations and dimple appearance, while the crack of cladded specimens initiates at the defects in the coating or the interface between the coating and the substrate, then extends to the coating which shows the brittle inter-dendritic fracture and the substrate shows the ductile fatigue fracture respectively.

引用

页数：6

共 12 条

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