Fabrication, microstructure and micromechanical properties of Fe-based metallic glass coating manufactured by laser

SURFACE & COATINGS TECHNOLOGY

卷:405

Article

Zhang, Peilei^1,2,3  Zhang, Qi^1,2  Yan, Hua^1,2  Yu, Zhishui^1,2  Yang, Jin^1,2  Chen, Jieshi^1,2  Wu, Di^1,2  Shi, Haichuan^1,2  Tian, Yingtao⁴  Ma, Songyun⁵  Lei, Weisheng^1,2 

[1] Shanghai Univ Engn Sci, Sch Mat Engn, Shanghai 201620, Peoples R China

[2] Shanghai Collaborat Innovat Ctr Laser Adv Mfg Tec, Shanghai 201620, Peoples R China

[3] Fraunhofer Inst Laser Technol ILT, D-52074 Aachen, Germany

[4] Univ Lancaster, Dept Engn, Lancaster LA1 4YW, England

[5] Rhein Westfal TH Aachen, Inst Gen Mech, D-52062 Aachen, Germany

关键词: Laser cladding;    Amorphous coating;    Composite coating;    Metallic glass;    Nanoindentation;   

DOI  :  10.1016/j.surfcoat.2020.126726

来源: Elsevier

【 摘 要 】

Iron-based amorphous alloys have received extensive attention due to their high hardness, elastic modulus/limit and wear/corrosion resistance. In this research, an attempt has been made to develop an amorphous coating of Fe-Cr-Mo-C-B-Y metallic glass coating on the steel substrate through laser surface treatment. During the test, various process parameters are used to determine the position of the amorphous phase. After coating, the microstructure and phase distribution of the coating were analyzed by scanning electron microscope, X-ray diffraction and transmission electron microscope. Mechanical properties of the coating were analyzed by using microhardness testing, abrasion resistance and nanoindentation methods. The results show that the coating thickness varies directly with the incident laser power and interaction time. The microstructure of the coating can be divided into three layers: the first layer (columnar crystals), the second layer (the crystalline phase filled with the unit structure) and the third layer (the unit structure consists of a crystalline phase and an amorphous phase). As the heat input of laser cladding decreases, the volume fraction of the amorphous phase increases, and the average microhardness and nanohardness increase.

【 授权许可】

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